$80+ Cheap flights from Illinois to Arizona
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PHX
Jun 4 — Jun 111
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Illinois to Arizona with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Illinois to Arizona
Cheapest
Best
Last-minute
One-way
Cheapest flights from Illinois to ArizonaExplore the most affordable flight options available from Illinois to Arizona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 5, 2026.
Explore the most affordable flight options available from Illinois to Arizona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 5, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1612:31 pm
MLI
- LAS
Nonstop3h 32m
Allegiant Air
Thu 8/277:05 am
LAS
- MLI
Nonstop3h 11m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$129
This Cheapflightsfares deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/912:31 pm
MLI
- LAS
Nonstop3h 32m
Allegiant Air
Thu 8/136:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$161
This Cheapflightsfares deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1212:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Thu 7/166:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$168
This Cheapflightsfares deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2312:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Thu 8/66:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Deal found 5/5![Allegiant Air logo]()
$174
This Cheapflightsfares deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1412:19 pm
MLI
- LAS
Nonstop3h 38m
Allegiant Air
Sun 5/246:15 am
LAS
- MLI
Nonstop3h 15m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$183
This Cheapflightsfares deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/61:13 pm
MLI
- LAS
Nonstop3h 24m
Allegiant Air
Thu 9/107:05 am
LAS
- MLI
Nonstop3h 18m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$184
This Cheapflightsfares deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/512:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Thu 7/96:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$186
This Cheapflightsfares deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/912:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Thu 7/166:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$193
This Cheapflightsfares deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:09 pm
STL
- LAS
1 stop21h 07m
Frontier
Fri 8/148:45 am
LAS
- STL
Nonstop3h 22m
Frontier
Deal found 4/30![Frontier logo]()
$197
This Booking.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/249:37 pm
ORD
- PHX
1 stop12h 07m
Frontier
Tue 6/29:15 am
PHX
- ORD
1 stop11h 46m
Frontier
Deal found 5/2![Frontier logo]()
$198
This Orbitz deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:58 pm
STL
- LAS
Nonstop3h 41m
Frontier
Sat 8/229:25 am
LAS
- STL
1 stop12h 49m
Frontier
Deal found 5/2![Frontier logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/178:50 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Wed 6/242:51 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Deal found 5/1![Allegiant Air logo]()
$198
Best flights from Illinois to ArizonaDiscover carefully curated flight deals from Illinois to Arizona that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 5, 2026.
Discover carefully curated flight deals from Illinois to Arizona that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 5, 2026.
This Mytrip deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/201:04 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Mon 6/223:11 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Deal found 4/30![Allegiant Air logo]()
$197
This United Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/21:30 pm
ORD
- PHX
Nonstop3h 45m
United Airlines
Tue 6/92:45 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Deal found 5/3![United Airlines logo]()
$255
This Southwest deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:35 am
MDW
- PHX
Nonstop3h 55m
Southwest
Wed 6/36:05 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Deal found 5/4![Southwest logo]()
$271
This Delta deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:24 am
ORD
- PHX
1 stop6h 25m
Delta
Fri 5/2910:55 pm
PHX
- ORD
1 stop7h 50m
Delta
Deal found 5/2![Delta logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/311:11 pm
RFD
- LAS
Nonstop3h 41m
Multiple Airlines
Thu 6/44:54 pm
LAS
- RFD
2 stops37h 23m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$299
This Mytrip deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/19:13 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Mon 6/83:11 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$200
This Alaska Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/118:50 am
ORD
- LAS
1 stop7h 09m
Alaska Airlines
Mon 5/117:42 pm
LAS
- ORD
1 stop15h 31m
Alaska Airlines
Deal found 5/4![Alaska Airlines logo]()
$417
This Mytrip deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/39:13 pm
RFD
- AZA
Nonstop3h 22m
Allegiant Air
Mon 7/63:15 pm
AZA
- RFD
Nonstop3h 08m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$203
This Gotogate deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/259:13 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Wed 5/272:59 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$206
This United Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/293:47 pm
ORD
- LAS
1 stop6h 34m
United Airlines
Wed 7/17:00 am
LAS
- ORD
Nonstop3h 48m
United Airlines
Deal found 4/30![United Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:15 pm
ORD
- PHX
Nonstop3h 55m
Southwest
Sat 5/304:55 pm
PHX
- ORD
Nonstop3h 25m
Southwest
Deal found 5/2![Southwest logo]()
$271
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/231:01 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Wed 5/272:59 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Deal found 5/1![Allegiant Air logo]()
$207
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/43:54 pm
ORD
- LAS
Nonstop4h 03m
United Airlines
Mon 6/811:59 pm
LAS
- ORD
Nonstop3h 41m
United Airlines
Deal found 5/4![United Airlines logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/108:50 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Mon 6/223:11 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$210
This Southwest deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/166:45 am
MDW
- PHX
Nonstop3h 40m
Southwest
Tue 6/236:50 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Deal found 5/2![Southwest logo]()
$286
This Delta deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/23:55 pm
ORD
- PHX
1 stop6h 15m
Delta
Tue 7/77:15 am
PHX
- ORD
1 stop9h 30m
Delta
Deal found 5/1![Delta logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/199:19 am
RFD
- LAS
1 stop13h 15m
Multiple Airlines
Thu 7/237:00 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/88:35 pm
RFD
- AZA
Nonstop3h 34m
Allegiant Air
Fri 5/223:17 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$211
This United Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/19:43 pm
ORD
- PHX
Nonstop3h 54m
United Airlines
Sat 6/61:31 pm
PHX
- ORD
1 stop7h 18m
United Airlines
Deal found 5/1![United Airlines logo]()
$281
This Southwest deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/295:20 am
MDW
- PHX
Nonstop3h 35m
Southwest
Tue 7/286:50 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Deal found 4/30![Southwest logo]()
$286
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/49:17 am
MDW
- LAS
1 stop6h 20m
Delta
Tue 7/71:18 pm
LAS
- MDW
1 stop6h 57m
Delta
Deal found 5/4![Delta logo]()
$327
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/268:18 pm
ORD
- PHX
Nonstop3h 57m
United Airlines
Thu 6/44:21 pm
PHX
- ORD
1 stop6h 23m
United Airlines
Deal found 5/4![United Airlines logo]()
$283
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/309:19 am
RFD
- LAS
2 stops10h 10m
Multiple Airlines
Sun 8/27:00 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$346
This Mytrip deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/158:35 pm
RFD
- AZA
Nonstop3h 34m
Allegiant Air
Mon 5/182:44 pm
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Deal found 4/30![Allegiant Air logo]()
$220
This Southwest deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/193:00 pm
MDW
- PHX
1 stop6h 20m
Southwest
Wed 5/2711:55 pm
PHX
- MDW
Nonstop3h 05m
Southwest
Deal found 4/30![Southwest logo]()
$300
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/287:37 pm
ORD
- LAS
1 stop6h 07m
Delta
Thu 7/26:19 am
LAS
- ORD
1 stop8h 43m
Delta
Deal found 5/5![Delta logo]()
$345
This United Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/229:43 pm
ORD
- PHX
Nonstop3h 54m
United Airlines
Sat 6/271:28 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Deal found 5/1![United Airlines logo]()
$286
This Trip.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:11 pm
RFD
- LAS
Nonstop3h 41m
Allegiant Air
Thu 6/47:00 am
LAS
- RFD
Nonstop3h 23m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$221
This Southwest deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/49:55 pm
MDW
- PHX
Nonstop3h 40m
Southwest
Sun 6/75:40 am
PHX
- MDW
Nonstop3h 15m
Southwest
Deal found 5/4![Southwest logo]()
$302
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/145:00 am
ORD
- PHX
1 stop6h 00m
United Airlines
Sat 6/205:49 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Deal found 5/4![United Airlines logo]()
$296
Last-minute flights from Illinois to ArizonaDiscover last-minute flight deals from Illinois to Arizona. Data last updated May 5, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Arizona. Data last updated May 5, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1012:19 pm
MLI
- LAS
Nonstop3h 38m
Allegiant Air
Thu 5/146:20 am
LAS
- MLI
Nonstop3h 09m
Allegiant Air
Deal found 4/30![Allegiant Air logo]()
$195
This Cheapflightsfares deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1412:19 pm
MLI
- LAS
Nonstop3h 38m
Allegiant Air
Sun 5/246:15 am
LAS
- MLI
Nonstop3h 15m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$183
This Cheapflightsfares deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/161:59 pm
ORD
- PHX
1 stop10h 27m
Frontier
Tue 5/199:15 am
PHX
- ORD
1 stop11h 46m
Frontier
Deal found 4/30![Frontier logo]()
$199
This Cheapflightsfares deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/167:08 pm
STL
- LAS
1 stop6h 46m
Frontier
Wed 5/202:49 pm
LAS
- STL
1 stop26h 34m
Frontier
Deal found 5/1![Frontier logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/208:55 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Fri 5/223:17 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Deal found 5/1![Allegiant Air logo]()
$199
This Booking.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/249:37 pm
ORD
- PHX
1 stop12h 07m
Frontier
Tue 6/29:15 am
PHX
- ORD
1 stop11h 46m
Frontier
Deal found 5/2![Frontier logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/259:13 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Sat 5/307:05 am
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/299:13 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Mon 6/13:17 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:27 pm
STL
- LAS
1 stop21h 26m
Frontier
Thu 6/48:00 am
LAS
- STL
1 stop13h 57m
Frontier
Deal found 5/1![Frontier logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/178:50 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Wed 6/242:51 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Deal found 5/1![Allegiant Air logo]()
$198
This Mytrip deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/201:04 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Mon 6/223:11 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Deal found 4/30![Allegiant Air logo]()
$197
This Cheapflightsfares deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/2112:29 pm
MLI
- LAS
Nonstop3h 26m
Allegiant Air
Thu 6/256:25 am
LAS
- MLI
Nonstop3h 14m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$199
One-way flights from Illinois to ArizonaSearch for one-way flight options from Illinois to Arizona. Find affordable one-way fares based on user searches. Data last updated May 5, 2026.
Search for one-way flight options from Illinois to Arizona. Find affordable one-way fares based on user searches. Data last updated May 5, 2026.
This Frontier deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:30 pm
STL
- PHX
1 stop6h 54m
Frontier
Deal found 5/1![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/85:27 pm
STL
- LAS
1 stop29h 12m
Frontier
Deal found 5/2![Frontier logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/306:31 pm
STL
- PHX
1 stop29h 49m
Frontier
Deal found 5/1![Frontier logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/107:04 pm
STL
- PHX
1 stop6h 00m
Frontier
Deal found 5/2![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1012:19 pm
MLI
- LAS
Nonstop3h 38m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:08 pm
STL
- PHX
2 stops21h 04m
Frontier
Deal found 5/4![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/268:08 pm
STL
- PHX
1 stop21h 15m
Frontier
Deal found 5/2![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/286:31 pm
STL
- LAS
1 stop20h 04m
Frontier
Deal found 5/5![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/268:08 pm
STL
- LAS
2 stops42h 54m
Frontier
Deal found 5/1![Frontier logo]()
$95
This Cheapflightsfares deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1212:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/23:07 pm
MDW
- PHX
1 stop23h 03m
Frontier
Deal found 4/30![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/279:37 pm
ORD
- PHX
2 stops19h 35m
Frontier
Deal found 5/5![Frontier logo]()
$98
Find flight deals from Illinois to Arizona
Keep the following information in mind while searching for Illinois to Arizona flight deals. Data was last updated May 5, 2026.
Round-trip from | $129 (Cheapflightsfares) |
|---|---|
One-way from | $80 (Frontier) |
Popular in | March |
Cheapest in | August |
Average price | $296 |
Good round-trip deal | $161 or less |
Good one-way deal | $60 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Arizona that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 5, 2026.
Use the filters below to find and compare flights from Illinois to Arizona that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Sat 6/20
1:04 pm-2:28 pm
Nonstop3h 24m
Phoenix-Mesa Gateway
Mon 6/22
3:11 pm-8:20 pm
Nonstop3h 09m
$197
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Mon 6/1
9:13 pm-10:48 pm
Nonstop3h 35m
Phoenix-Mesa Gateway
Mon 6/8
3:11 pm-8:20 pm
Nonstop3h 09m
$200
Quickest round-trip
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Fri 7/3
9:13 pm-10:35 pm
Nonstop3h 22m
Phoenix-Mesa Gateway
Mon 7/6
3:15 pm-8:23 pm
Nonstop3h 08m
$203
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Mon 5/25
9:13 pm-10:48 pm
Nonstop3h 35m
Phoenix-Mesa Gateway
Wed 5/27
2:59 pm-8:05 pm
Nonstop3h 06m
$206
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Sat 5/23
1:01 pm-2:36 pm
Nonstop3h 35m
Phoenix-Mesa Gateway
Wed 5/27
2:59 pm-8:05 pm
Nonstop3h 06m
$207
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Wed 6/10
8:50 pm-10:14 pm
Nonstop3h 24m
Phoenix-Mesa Gateway
Mon 6/22
3:11 pm-8:20 pm
Nonstop3h 09m
$210
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Fri 5/8
8:35 pm-10:09 pm
Nonstop3h 34m
Phoenix-Mesa Gateway
Fri 5/22
3:17 pm-8:23 pm
Nonstop3h 06m
$211
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Fri 5/15
8:35 pm-10:09 pm
Nonstop3h 34m
Phoenix-Mesa Gateway
Mon 5/18
2:44 pm-7:45 pm
Nonstop3h 01m
$220
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Thu 5/28
1:11 pm-2:52 pm
Nonstop3h 41m
Las Vegas Harry Reid Intl
Thu 6/4
7:00 am-12:23 pm
Nonstop3h 23m
$221
ChicagoPhoenix
ORD - PHX
ORDPHX
Chicago O'Hare Intl
Tue 6/2
1:30 pm-3:15 pm
Nonstop3h 45m
Phoenix Sky Harbor Intl
Tue 6/9
2:45 pm-8:27 pm
Nonstop3h 42m
$255
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to Arizona
Have a flexible travel schedule? Discover the best time to fly to Arizona from Illinois with our price prediction graph.
MLI-LAS
RFD-AZA
ORD-PHX
STL-LAS
MDW-PHX
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Illinois to Arizona
USIL-USAZ
MLI-LAS
RFD-AZA
ORD-PHX
STL-LAS
How far ahead should I book a flight from Illinois to Arizona?
Booking 80 days in advance of your planned departure date is, on average, the best time to get cheap flights from Illinois to Arizona. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Illinois to Arizona?
Currently, January is the cheapest month in which you can book a flight from Illinois to Arizona (average of $225). Flying from Illinois to Arizona in December is currently the most expensive (average of $368). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from IL to AZ?
Find hourly flight availability from Illinois to Arizona. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 5, 2026.
One of the essential ways to save on airfare from Illinois to Arizona is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 13% on airfare.
What is the cheapest day to fly from Illinois to Arizona?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Arizona. Price data was last updated on May 2, 2026.
Travelers seeking maximum savings on their Illinois to Arizona flight should consider departing on Tuesday evenings when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Illinois to Arizona
Explore weekly flight availability from Illinois to Arizona. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 5, 2026.
The most flights from USIL to USAZ are scheduled on a Monday (53 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (29 on average).
How much does it cost to fly round-trip from Illinois to Arizona?
Reviews of airlines servicing Arizona
Get insights into the airlines that provide service to Arizona. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Arizona. Reviews last updated May 5, 2026.
Read through reviews of airlines operating flights from Illinois to Arizona, such as Southwest,United Airlines, andAllegiant Air. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Illinois to Arizona. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Return Flight Options
Top destinations
Alternative routes for Illinois to Arizona
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Arizona by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Arizona by cabin class
Find flights from Illinois to Arizona, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Arizona flights
Browse other Illinois and Arizona flight options. Last updated on May 5, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Arizona
Find the right flight back to Illinois after your stay in Arizona
Illinois to Arizona flights
Consider these flights traveling from Illinois to Arizona.
Top 8 airlines flying from Illinois to Arizona
Discover the top 8 airlines that operate flights from Illinois to Arizona. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$66 | Average$226 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$79 | Average$232 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$108 | Average$286 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$154 | Average$251 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$183 | Average$425 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$188 | Average$328 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$194 | Average$464 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$201 | Average$371 | FlexibilityNo cancel fee | On-time63% |