$69+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PHX
Sep 3 — Sep 101
Round-trip
1 adult, Economy
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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 August 4, 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 August 4, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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 11/152:38 pm
MLI
- LAS
Nonstop3h 32m
Allegiant Air
Tue 11/242:58 pm
LAS
- MLI
Nonstop3h 08m
Allegiant Air
Deal found 7/30![Allegiant Air logo]()
$129
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:29 am
STL
- LAS
1 stop11h 03m
Alaska Airlines
Sat 9/198:02 am
LAS
- STL
1 stop7h 08m
Alaska Airlines
Deal found 7/30![Alaska Airlines logo]()
$137
This Cheapflightsfares deal was found by Cheapflights users on 8/3. 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 10/112:05 pm
MLI
- LAS
Nonstop3h 32m
Allegiant Air
Thu 10/157:05 am
LAS
- MLI
Nonstop3h 10m
Allegiant Air
Deal found 8/3![Allegiant Air logo]()
$154
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/143:19 pm
STL
- LAS
1 stop8h 22m
Alaska Airlines
Sat 9/198:02 am
LAS
- STL
1 stop7h 08m
Alaska Airlines
Deal found 7/30![Alaska Airlines logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 9/168:10 pm
STL
- PHX
1 stop13h 50m
Frontier
Wed 9/239:15 am
PHX
- STL
1 stop8h 02m
Frontier
Deal found 7/31![Frontier logo]()
$158
This Cheapflightsfares deal was found by Cheapflights users on 8/1. 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.
Sun 8/1612:31 pm
MLI
- LAS
Nonstop3h 32m
Allegiant Air
Thu 8/207:05 am
LAS
- MLI
Nonstop3h 11m
Allegiant Air
Deal found 8/1![Allegiant Air logo]()
$161
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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 10/182:00 pm
MLI
- LAS
Nonstop3h 32m
Allegiant Air
Thu 10/226:35 am
LAS
- MLI
Nonstop3h 10m
Allegiant Air
Deal found 7/30![Allegiant Air logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 9/85:27 pm
STL
- PHX
1 stop7h 33m
Frontier
Tue 9/158:56 pm
PHX
- STL
1 stop20h 21m
Frontier
Deal found 7/31![Frontier logo]()
$168
This Cheapflightsfares deal was found by Cheapflights users on 7/31. 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 7/31![Allegiant Air logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 9/308:10 pm
STL
- LAS
1 stop14h 18m
Frontier
Sat 10/36:45 am
LAS
- STL
1 stop10h 32m
Frontier
Deal found 7/31![Frontier logo]()
$170
This Cheapflightsfares deal was found by Cheapflights users on 8/1. 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.
Sun 11/82:38 pm
MLI
- LAS
Nonstop3h 32m
Allegiant Air
Thu 11/126:35 am
LAS
- MLI
Nonstop3h 18m
Allegiant Air
Deal found 8/1![Allegiant Air logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 9/85:27 pm
STL
- PHX
1 stop7h 33m
Frontier
Wed 9/96:25 am
PHX
- STL
1 stop10h 52m
Frontier
Deal found 7/30![Frontier logo]()
$171
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 August 4, 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 August 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 8/239:35 pm
RFD
- LAS
Nonstop3h 46m
Multiple Airlines
Wed 8/2612:57 am
LAS
- RFD
2 stops12h 12m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$203
This Justfly.com deal was found by Cheapflights users on 8/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:03 pm
RFD
- LAS
Nonstop3h 43m
Allegiant Air
Sun 10/43:26 pm
LAS
- RFD
Nonstop3h 20m
Allegiant Air
Deal found 8/3![Allegiant Air logo]()
$205
This Southwest deal was found by Cheapflights users on 8/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/55:40 am
MDW
- PHX
Nonstop3h 35m
Southwest
Fri 9/113:05 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Deal found 8/1![Southwest logo]()
$253
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/105:00 am
ORD
- PHX
1 stop6h 04m
United Airlines
Mon 9/148:45 am
PHX
- ORD
Nonstop3h 43m
United Airlines
Deal found 7/29![United Airlines logo]()
$263
This Trip.com deal was found by Cheapflights users on 7/29. 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.
Fri 8/216:01 am
ORD
- PHX
1 stop7h 30m
Alaska Airlines
Mon 8/243:15 pm
PHX
- ORD
1 stop6h 44m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$282
This Delta deal was found by Cheapflights users on 8/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/129:59 am
MDW
- PHX
1 stop7h 59m
Delta
Tue 9/156:00 am
PHX
- MDW
1 stop8h 15m
Delta
Deal found 8/3![Delta logo]()
$299
This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:35 pm
RFD
- LAS
Nonstop3h 46m
Allegiant Air
Sun 8/233:18 pm
LAS
- RFD
Nonstop3h 27m
Allegiant Air
Deal found 7/29![Allegiant Air logo]()
$223
This Southwest deal was found by Cheapflights users on 7/29. 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 8/277:55 pm
MDW
- PHX
Nonstop3h 35m
Southwest
Mon 8/314:00 pm
PHX
- MDW
1 stop5h 45m
Southwest
Deal found 7/29![Southwest logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 8/309:35 pm
RFD
- LAS
Nonstop3h 46m
Multiple Airlines
Wed 9/212:57 am
LAS
- RFD
2 stops12h 06m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$260
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Sat 9/51:30 pm
ORD
- PHX
1 stop5h 40m
United Airlines
Tue 9/84:26 pm
PHX
- ORD
Nonstop3h 39m
United Airlines
Deal found 7/29![United Airlines logo]()
$263
This Mytrip deal was found by Cheapflights users on 8/3. 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.
Sun 8/309:35 pm
RFD
- LAS
Nonstop3h 46m
Allegiant Air
Sun 9/63:15 pm
LAS
- RFD
Nonstop3h 24m
Allegiant Air
Deal found 8/3![Allegiant Air logo]()
$246
This Southwest deal was found by Cheapflights users on 7/30. 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.
Thu 8/208:00 am
MDW
- PHX
1 stop5h 50m
Southwest
Wed 8/2610:35 am
PHX
- MDW
1 stop4h 35m
Southwest
Deal found 7/30![Southwest logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/106:26 pm
RFD
- LAS
1 stop19h 38m
Multiple Airlines
Thu 8/137:10 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$267
This CheapOair deal was found by Cheapflights users on 8/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/412:09 pm
RFD
- AZA
Nonstop3h 25m
Allegiant Air
Mon 9/77:40 am
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Deal found 8/2![Allegiant Air logo]()
$246
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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.
Fri 9/113:52 pm
ORD
- LAS
1 stop9h 25m
Alaska Airlines
Tue 9/158:45 am
LAS
- ORD
1 stop8h 36m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$301
This United Airlines deal was found by Cheapflights users on 8/3. 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.
Wed 9/166:32 am
MLI
- LAS
2 stops9h 27m
United Airlines
Wed 9/2312:40 pm
LAS
- MLI
1 stop6h 20m
United Airlines
Deal found 8/3![United Airlines logo]()
$276
This Delta deal was found by Cheapflights users on 7/31. 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.
Wed 8/2612:46 pm
MDW
- PHX
1 stop6h 53m
Delta
Fri 8/2811:05 pm
PHX
- MDW
1 stop8h 12m
Delta
Deal found 7/31![Delta logo]()
$311
This United Airlines deal was found by Cheapflights users on 8/3. 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.
Sun 9/69:05 am
MLI
- LAS
2 stops8h 11m
United Airlines
Wed 9/99:08 am
LAS
- MLI
1 stop6h 18m
United Airlines
Deal found 8/3![United Airlines logo]()
$276
This Southwest deal was found by Cheapflights users on 7/30. 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 9/228:20 pm
MDW
- LAS
Nonstop3h 55m
Southwest
Fri 9/2512:20 am
LAS
- MDW
Nonstop3h 20m
Southwest
Deal found 7/30![Southwest logo]()
$283
This Delta deal was found by Cheapflights users on 8/1. 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.
Fri 10/307:16 am
ORD
- LAS
1 stop6h 36m
Delta
Mon 11/212:47 pm
LAS
- ORD
1 stop6h 45m
Delta
Deal found 8/1![Delta logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 8/2. 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.
Thu 10/19:03 pm
RFD
- LAS
Nonstop3h 43m
Allegiant Air
Sun 10/183:23 pm
LAS
- RFD
Nonstop3h 20m
Allegiant Air
Deal found 8/2![Allegiant Air logo]()
$260
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/222:18 pm
ORD
- PHX
1 stop6h 49m
Alaska Airlines
Wed 8/2612:13 pm
PHX
- ORD
1 stop29h 08m
Alaska Airlines
Deal found 7/30![Alaska Airlines logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/179:24 pm
RFD
- LAS
2 stops22h 05m
Multiple Airlines
Thu 8/203:18 pm
LAS
- RFD
Nonstop3h 27m
Multiple Airlines
Deal found 8/3![Multiple Airlines logo]()
$293
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Wed 8/268:45 pm
ORD
- LAS
Nonstop4h 07m
United Airlines
Wed 9/211:55 pm
LAS
- ORD
Nonstop3h 30m
United Airlines
Deal found 7/29![United Airlines logo]()
$283
This Southwest deal was found by Cheapflights users on 7/30. 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 9/145:30 pm
MDW
- LAS
Nonstop3h 55m
Southwest
Wed 9/237:55 am
LAS
- MDW
Nonstop3h 35m
Southwest
Deal found 7/30![Southwest logo]()
$283
This Mytrip deal was found by Cheapflights users on 8/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/149:24 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Mon 8/173:25 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Deal found 8/2![Allegiant Air logo]()
$261
This Delta deal was found by Cheapflights users on 8/2. 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.
Mon 9/285:10 pm
ORD
- LAS
1 stop6h 35m
Delta
Mon 10/1210:35 pm
LAS
- ORD
1 stop7h 06m
Delta
Deal found 8/2![Delta logo]()
$325
This Southwest deal was found by Cheapflights users on 7/29. 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 8/268:35 am
MDW
- LAS
Nonstop3h 55m
Southwest
Wed 9/27:55 am
LAS
- MDW
Nonstop3h 35m
Southwest
Deal found 7/29![Southwest logo]()
$283
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:00 am
ORD
- LAS
2 stops11h 24m
Alaska Airlines
Sat 9/191:25 pm
LAS
- ORD
1 stop8h 34m
Alaska Airlines
Deal found 7/30![Alaska Airlines logo]()
$346
This United Airlines deal was found by Cheapflights users on 8/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/274:30 pm
ORD
- PHX
Nonstop3h 53m
United Airlines
Mon 8/313:19 pm
PHX
- ORD
1 stop6h 40m
United Airlines
Deal found 8/2![United Airlines logo]()
$289
Last-minute flights from Illinois to ArizonaDiscover last-minute flight deals from Illinois to Arizona. Data last updated August 4, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Arizona. Data last updated August 4, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 8/1. 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.
Sun 8/1612:31 pm
MLI
- LAS
Nonstop3h 32m
Allegiant Air
Thu 8/207:05 am
LAS
- MLI
Nonstop3h 11m
Allegiant Air
Deal found 8/1![Allegiant Air logo]()
$161
This Cheapflightsfares deal was found by Cheapflights users on 8/1. 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.
Sun 8/1612:31 pm
MLI
- LAS
Nonstop3h 32m
Allegiant Air
Sun 8/307:05 am
LAS
- MLI
Nonstop3h 11m
Allegiant Air
Deal found 8/1![Allegiant Air logo]()
$177
This Cheapflightsfares deal was found by Cheapflights users on 7/31. 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 7/31![Allegiant Air logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 9/85:27 pm
STL
- PHX
1 stop7h 33m
Frontier
Wed 9/99:15 am
PHX
- STL
1 stop8h 02m
Frontier
Deal found 7/31![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Sun 9/131:02 pm
STL
- LAS
1 stop21h 26m
Frontier
Wed 9/169:45 am
LAS
- STL
1 stop7h 32m
Frontier
Deal found 7/30![Frontier logo]()
$176
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/143:19 pm
STL
- LAS
1 stop8h 22m
Alaska Airlines
Tue 9/158:02 am
LAS
- STL
1 stop7h 08m
Alaska Airlines
Deal found 7/30![Alaska Airlines logo]()
$157
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/143:19 pm
STL
- LAS
1 stop8h 22m
Alaska Airlines
Fri 9/187:02 am
LAS
- STL
1 stop8h 08m
Alaska Airlines
Deal found 7/30![Alaska Airlines logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:29 am
STL
- LAS
1 stop11h 03m
Alaska Airlines
Sat 9/198:02 am
LAS
- STL
1 stop7h 08m
Alaska Airlines
Deal found 7/30![Alaska Airlines logo]()
$137
This Orbitz deal was found by Cheapflights users on 7/31. 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 9/156:29 am
STL
- LAS
1 stop11h 03m
Multiple Airlines
Fri 9/186:10 am
LAS
- STL
Nonstop3h 17m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 9/168:10 pm
STL
- PHX
1 stop13h 50m
Frontier
Wed 9/239:15 am
PHX
- STL
1 stop8h 02m
Frontier
Deal found 7/31![Frontier logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 9/308:10 pm
STL
- LAS
1 stop14h 18m
Frontier
Sat 10/36:45 am
LAS
- STL
1 stop10h 32m
Frontier
Deal found 7/31![Frontier logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 9/308:10 pm
STL
- PHX
2 stops18h 12m
Frontier
Wed 10/79:15 am
PHX
- STL
1 stop8h 02m
Frontier
Deal found 7/31![Frontier logo]()
$175
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 August 4, 2026.
Search for one-way flight options from Illinois to Arizona. Find affordable one-way fares based on user searches. Data last updated August 4, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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.
Wed 10/287:02 am
STL
- LAS
1 stop9h 58m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 9/168:10 pm
STL
- LAS
1 stop14h 18m
Frontier
Deal found 7/29![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Sun 9/61:13 pm
MLI
- LAS
Nonstop3h 24m
Allegiant Air
Deal found 7/30![Allegiant Air logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 9/288:10 pm
STL
- LAS
1 stop19h 57m
Frontier
Deal found 7/31![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 10/268:10 pm
STL
- LAS
1 stop15h 20m
Frontier
Deal found 7/29![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 10/168:10 pm
STL
- LAS
1 stop19h 17m
Frontier
Deal found 8/2![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Wed 9/308:10 pm
STL
- PHX
1 stop13h 50m
Frontier
Deal found 7/30![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Fri 10/28:10 pm
STL
- LAS
1 stop19h 57m
Frontier
Deal found 8/1![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Sun 9/131:02 pm
STL
- PHX
1 stop8h 49m
Frontier
Deal found 7/30![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/218:10 pm
STL
- LAS
1 stop13h 15m
Frontier
Deal found 8/3![Frontier logo]()
$93
This Delta deal was found by Cheapflights users on 7/31. 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.
Wed 9/306:55 pm
STL
- LAS
1 stop6h 40m
Delta
Deal found 7/31![Delta logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 9/308:10 pm
STL
- LAS
2 stops29h 18m
Frontier
Deal found 7/31![Frontier logo]()
$95
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 August 4, 2026.
Round-trip from | $137 (Alaska Airlines) |
|---|---|
One-way from | $69 (Alaska Airlines) |
Popular in | June |
Cheapest in | January |
Average price | $267 |
Good round-trip deal | $142 or less |
Good one-way deal | $85 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 August 4, 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
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Sun 8/23
9:35 pm-11:21 pm
Nonstop3h 46m
Las Vegas Harry Reid Intl
Wed 8/26
12:57 am-3:09 pm
2 stops12h 12m
$203
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Thu 10/1
9:03 pm-10:46 pm
Nonstop3h 43m
Las Vegas Harry Reid Intl
Sun 10/4
3:26 pm-8:46 pm
Nonstop3h 20m
$205
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Thu 8/20
9:35 pm-11:21 pm
Nonstop3h 46m
Las Vegas Harry Reid Intl
Sun 8/23
3:18 pm-8:45 pm
Nonstop3h 27m
$223
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Sun 8/30
9:35 pm-11:21 pm
Nonstop3h 46m
Las Vegas Harry Reid Intl
Sun 9/6
3:15 pm-8:39 pm
Nonstop3h 24m
$246
Quickest round-trip
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Fri 9/4
12:09 pm-1:34 pm
Nonstop3h 25m
Phoenix-Mesa Gateway
Mon 9/7
7:40 am-12:49 pm
Nonstop3h 09m
$246
ChicagoPhoenix
MDW - PHX
MDWPHX
Chicago Midway
Sat 9/5
5:40 am-7:15 am
Nonstop3h 35m
Phoenix Sky Harbor Intl
Fri 9/11
3:05 pm-8:20 pm
Nonstop3h 15m
$253
ChicagoPhoenix
MDW - PHX
MDWPHX
Chicago Midway
Thu 8/27
7:55 pm-9:30 pm
Nonstop3h 35m
Phoenix Sky Harbor Intl
Mon 8/31
4:00 pm-11:45 pm
1 stop5h 45m
$259
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Sun 8/30
9:35 pm-11:21 pm
Nonstop3h 46m
Las Vegas Harry Reid Intl
Wed 9/2
12:57 am-3:03 pm
2 stops12h 06m
$260
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Thu 10/1
9:03 pm-10:46 pm
Nonstop3h 43m
Las Vegas Harry Reid Intl
Sun 10/18
3:23 pm-8:43 pm
Nonstop3h 20m
$260
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Fri 8/14
9:24 pm-10:59 pm
Nonstop3h 35m
Phoenix-Mesa Gateway
Mon 8/17
3:25 pm-8:34 pm
Nonstop3h 09m
$261
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.
RFD-LAS
MDW-PHX
ORD-PHX
RFD-AZA
ORD-LAS
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
RFD-LAS
MDW-PHX
ORD-PHX
RFD-AZA
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 $247). Flying from Illinois to Arizona in June is currently the most expensive (average of $360). 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 August 4, 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 12% on airfare.
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 August 4, 2026.
The most flights from USIL to USAZ are scheduled on a Monday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).
How much does it cost to fly round-trip from Illinois to Arizona?
Airfare is typical for this route at the moment.
Illinois to Arizona flights typically cost between $217 and $378 in September.The cheapest round-trip price found within the last 5 days was $245 on Frontier (Sep 16-Sep 20).
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 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 August 1, 2026.
Travelers seeking maximum savings on their Illinois to Arizona flight should consider departing on Friday afternoons when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
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 August 4, 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.
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
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.
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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 August 4, 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 August 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$64 | Average$219 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$108 | Average$432 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$118 | Average$224 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$186 | Average$417 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$188 | Average$310 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$196 | Average$477 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$214 | Average$388 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$220 | Average$269 | FlexibilityNo cancel fee | On-time75% |