$70+ Cheap flights from Arizona to Illinois
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 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Jun 3 — Jun 101
Round-trip
1 adult, Economy
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Cheapest flights from Arizona to IllinoisExplore the most affordable flight options available from Arizona to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 4, 2026.
Explore the most affordable flight options available from Arizona to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 4, 2026.
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1212:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Mon 8/172:52 pm
STL
- LAS
Nonstop3h 36m
Frontier
Deal found 5/4![Frontier logo]()
$156
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 8/511:40 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Wed 8/127:15 am
ORD
- LAS
Nonstop4h 03m
Frontier
Deal found 5/2![Frontier logo]()
$166
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:15 am
LAS
- ORD
1 stop12h 37m
Frontier
Tue 8/117:15 am
ORD
- LAS
Nonstop4h 03m
Frontier
Deal found 5/2![Frontier logo]()
$169
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.
Fri 5/2212:29 am
LAS
- ORD
1 stop18h 03m
Frontier
Wed 5/279:37 pm
ORD
- LAS
1 stop27h 52m
Frontier
Deal found 4/30![Frontier logo]()
$170
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.
Wed 8/1211:40 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Mon 8/175:46 pm
ORD
- LAS
1 stop23h 14m
Frontier
Deal found 4/30![Frontier logo]()
$172
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 8/86:00 am
LAS
- ORD
1 stop8h 08m
Frontier
Wed 8/127:15 am
ORD
- LAS
Nonstop4h 03m
Frontier
Deal found 5/1![Frontier logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 5/206:30 am
LAS
- ORD
1 stop12h 02m
Multiple Airlines
Fri 5/298:46 pm
ORD
- LAS
1 stop12h 55m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$174
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 6/812:59 am
LAS
- STL
1 stop16h 24m
Frontier
Tue 6/167:03 pm
STL
- LAS
1 stop7h 01m
Frontier
Deal found 5/2![Frontier logo]()
$175
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1111:40 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Fri 8/147:15 am
ORD
- LAS
Nonstop4h 03m
Frontier
Deal found 5/3![Frontier logo]()
$176
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.
Thu 6/2511:20 pm
LAS
- ORD
Nonstop3h 47m
Frontier
Wed 7/17:20 am
ORD
- LAS
Nonstop4h 16m
Frontier
Deal found 5/1![Frontier logo]()
$177
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:00 am
LAS
- MDW
1 stop6h 12m
Frontier
Wed 5/203:07 pm
MDW
- LAS
1 stop10h 47m
Frontier
Deal found 4/30![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Tue 8/116:53 pm
PHX
- STL
1 stop22h 30m
Frontier
Tue 8/188:08 pm
STL
- PHX
1 stop21h 16m
Frontier
Deal found 4/29![Frontier logo]()
$180
Best flights from Arizona to IllinoisDiscover carefully curated flight deals from Arizona to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 4, 2026.
Discover carefully curated flight deals from Arizona to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 4, 2026.
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:05 am
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Sat 6/61:04 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$190
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.
Tue 6/22:45 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Wed 6/39:05 am
ORD
- PHX
Nonstop4h 01m
United Airlines
Deal found 5/1![United Airlines logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 6/1011:36 am
LAS
- STL
2 stops28h 42m
Frontier
Fri 6/267:38 pm
STL
- LAS
1 stop5h 51m
Frontier
Deal found 4/29![Frontier logo]()
$255
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:30 pm
PHX
- ORD
Nonstop3h 25m
Southwest
Tue 6/26:15 am
ORD
- PHX
1 stop8h 40m
Southwest
Deal found 5/3![Southwest logo]()
$265
This Spirit 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:59 pm
LAS
- ORD
Nonstop3h 30m
Spirit Airlines
Tue 9/297:30 pm
ORD
- LAS
1 stop15h 49m
Spirit Airlines
Deal found 5/2![Spirit Airlines logo]()
$268
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:55 am
PHX
- MDW
1 stop5h 54m
Delta
Wed 10/286:00 am
MDW
- PHX
1 stop8h 31m
Delta
Deal found 5/3![Delta logo]()
$275
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:05 am
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Mon 5/259:13 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$193
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.
Wed 7/292:51 pm
AZA
- RFD
Nonstop3h 08m
Allegiant Air
Mon 8/39:13 pm
RFD
- AZA
Nonstop3h 22m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$195
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/272:59 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Wed 6/38:50 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$197
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1111:11 am
LAS
- STL
2 stops10h 48m
Alaska Airlines
Sat 6/139:42 am
STL
- LAS
2 stops10h 59m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$505
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/139:00 am
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Fri 5/158:35 pm
RFD
- AZA
Nonstop3h 34m
Allegiant Air
Deal found 5/1![Allegiant Air logo]()
$197
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.
Tue 6/211:30 pm
LAS
- ORD
Nonstop3h 41m
United Airlines
Mon 6/84:30 pm
ORD
- LAS
Nonstop4h 03m
United Airlines
Deal found 5/1![United Airlines logo]()
$263
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 8/193:50 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Sat 8/2910:10 am
MDW
- PHX
1 stop6h 40m
Southwest
Deal found 5/2![Southwest logo]()
$265
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.
Tue 10/2712:05 pm
PHX
- MDW
1 stop7h 40m
Delta
Sat 10/315:35 pm
MDW
- PHX
1 stop7h 39m
Delta
Deal found 5/1![Delta logo]()
$275
This Super.com deal was found by Cheapflights users on 4/29. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/171:23 pm
LAS
- STL
Nonstop3h 28m
Frontier
Sat 6/202:56 pm
STL
- LAS
Nonstop3h 35m
Frontier
Deal found 4/29![Frontier logo]()
$286
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/223:17 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Wed 5/278:55 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$199
This United Airlines deal was found by Cheapflights users on 4/29. 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 6/204:21 pm
PHX
- ORD
1 stop6h 23m
United Airlines
Tue 6/239:28 pm
ORD
- PHX
Nonstop3h 54m
United Airlines
Deal found 4/29![United Airlines logo]()
$265
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/111:55 pm
LAS
- MDW
Nonstop3h 30m
Southwest
Mon 6/88:15 pm
MDW
- LAS
Nonstop3h 50m
Southwest
Deal found 5/3![Southwest logo]()
$269
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/92:45 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Tue 7/215:00 am
ORD
- PHX
1 stop6h 00m
United Airlines
Deal found 5/2![United Airlines logo]()
$265
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.
Fri 6/123:11 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Mon 6/159:10 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$200
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/211:23 pm
PHX
- ORD
1 stop6h 27m
Delta
Tue 5/262:11 pm
ORD
- PHX
1 stop5h 54m
Delta
Deal found 4/29![Delta logo]()
$293
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:30 pm
PHX
- ORD
Nonstop3h 25m
Southwest
Mon 6/17:20 pm
ORD
- PHX
Nonstop3h 55m
Southwest
Deal found 5/3![Southwest logo]()
$271
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 5/267:10 pm
LAS
- ORD
Nonstop3h 49m
United Airlines
Fri 5/293:47 pm
ORD
- LAS
1 stop6h 34m
United Airlines
Deal found 5/3![United Airlines logo]()
$267
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:05 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Mon 6/11:50 pm
MDW
- PHX
Nonstop3h 45m
Southwest
Deal found 5/3![Southwest logo]()
$271
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/152:44 pm
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Mon 5/188:35 pm
RFD
- AZA
Nonstop3h 34m
Allegiant Air
Deal found 5/1![Allegiant Air logo]()
$206
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/31:20 pm
PHX
- ORD
1 stop6h 37m
Delta
Fri 7/101:44 pm
ORD
- PHX
1 stop9h 50m
Delta
Deal found 4/30![Delta logo]()
$306
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.
Wed 6/1710:25 am
LAS
- ORD
Nonstop3h 56m
United Airlines
Wed 6/245:00 am
ORD
- LAS
1 stop6h 07m
United Airlines
Deal found 5/3![United Airlines logo]()
$267
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2611:55 am
LAS
- MDW
1 stop5h 35m
Southwest
Mon 6/810:00 am
MDW
- LAS
1 stop5h 15m
Southwest
Deal found 5/3![Southwest logo]()
$274
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/182:44 pm
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Mon 5/259:13 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Deal found 4/29![Allegiant Air logo]()
$220
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/111:30 pm
LAS
- ORD
Nonstop3h 41m
United Airlines
Mon 6/87:50 pm
ORD
- LAS
Nonstop4h 09m
United Airlines
Deal found 5/2![United Airlines logo]()
$269
Last-minute flights from Arizona to IllinoisDiscover last-minute flight deals from Arizona to Illinois. Data last updated May 4, 2026 and is based on user searches.
Discover last-minute flight deals from Arizona to Illinois. Data last updated May 4, 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.
Fri 5/158:00 am
LAS
- ORD
1 stop13h 13m
Frontier
Sat 5/234:05 pm
ORD
- LAS
1 stop8h 18m
Frontier
Deal found 4/30![Frontier logo]()
$184
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:00 am
LAS
- MDW
1 stop6h 12m
Frontier
Wed 5/203:07 pm
MDW
- LAS
1 stop10h 47m
Frontier
Deal found 4/30![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 5/206:30 am
LAS
- ORD
1 stop12h 02m
Multiple Airlines
Fri 5/298:46 pm
ORD
- LAS
1 stop12h 55m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$174
This Frontier deal was found by Cheapflights users on 4/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:30 am
LAS
- ORD
1 stop12h 02m
Frontier
Sat 5/301:50 pm
ORD
- LAS
1 stop9h 01m
Frontier
Deal found 4/29![Frontier logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 5/206:30 am
LAS
- ORD
1 stop12h 02m
Frontier
Thu 5/289:37 pm
ORD
- LAS
1 stop11h 33m
Frontier
Deal found 4/29![Frontier logo]()
$189
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.
Fri 5/2212:29 am
LAS
- ORD
1 stop18h 03m
Frontier
Wed 5/279:37 pm
ORD
- LAS
1 stop27h 52m
Frontier
Deal found 4/30![Frontier logo]()
$170
This eDestinos 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:40 pm
PHX
- ORD
1 stop8h 54m
Frontier
Thu 6/49:10 am
ORD
- PHX
1 stop11h 25m
Frontier
Deal found 5/1![Frontier logo]()
$190
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:05 am
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Sat 6/61:04 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$190
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 6/13:17 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Sat 6/131:04 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$191
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/53:11 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Mon 6/89:10 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 4/30![Allegiant Air logo]()
$189
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 6/812:59 am
LAS
- STL
1 stop16h 24m
Frontier
Tue 6/167:03 pm
STL
- LAS
1 stop7h 01m
Frontier
Deal found 5/2![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Sat 6/137:05 am
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Wed 6/178:50 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 4/29![Allegiant Air logo]()
$188
One-way flights from Arizona to IllinoisSearch for one-way flight options from Arizona to Illinois. Find affordable one-way fares based on user searches. Data last updated May 4, 2026.
Search for one-way flight options from Arizona to Illinois. Find affordable one-way fares based on user searches. Data last updated May 4, 2026.
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/812:59 am
LAS
- STL
1 stop16h 24m
Frontier
Deal found 4/30![Frontier logo]()
$70
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Tue 5/268:59 pm
LAS
- STL
1 stop20h 24m
Frontier
Deal found 4/29![Frontier logo]()
$76
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.
Fri 8/212:10 pm
LAS
- STL
Nonstop3h 26m
Frontier
Deal found 4/30![Frontier logo]()
$78
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:40 am
PHX
- STL
1 stop7h 54m
Frontier
Deal found 5/3![Frontier logo]()
$80
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2610:27 pm
PHX
- STL
1 stop17h 39m
Frontier
Deal found 5/2![Frontier logo]()
$85
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/208:59 pm
LAS
- STL
1 stop20h 24m
Frontier
Deal found 4/30![Frontier logo]()
$85
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:51 pm
PHX
- STL
1 stop22h 32m
Frontier
Deal found 5/3![Frontier logo]()
$88
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 6/276:24 am
PHX
- STL
1 stop10h 10m
Frontier
Deal found 5/1![Frontier logo]()
$89
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 6/111:26 am
PHX
- STL
2 stops29h 57m
Frontier
Deal found 5/4![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Fri 5/2212:29 am
LAS
- STL
1 stop16h 54m
Frontier
Deal found 4/29![Frontier logo]()
$93
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 6/256:24 am
PHX
- STL
1 stop9h 54m
Frontier
Deal found 4/30![Frontier logo]()
$95
This Super.com 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:40 am
PHX
- STL
1 stop8h 26m
Frontier
Deal found 5/3![Frontier logo]()
$99
Find flight deals from Arizona to Illinois
Keep the following information in mind while searching for Arizona to Illinois flight deals. Data was last updated May 4, 2026.
Round-trip from | $170 (Kiwi.com) |
|---|---|
One-way from | $70 (Trip.com) |
Popular in | December |
Cheapest in | February |
Average price | $295 |
Good round-trip deal | $166 or less |
Good one-way deal | $116 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Arizona to Illinois 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 4, 2026.
Use the filters below to find and compare flights from Arizona to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Sat 5/30
7:05 am-12:11 pm
Nonstop3h 06m
Chicago Greater Rockford
Sat 6/6
1:04 pm-2:28 pm
Nonstop3h 24m
$190
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Sat 5/23
7:05 am-12:11 pm
Nonstop3h 06m
Chicago Greater Rockford
Mon 5/25
9:13 pm-10:48 pm
Nonstop3h 35m
$193
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Wed 7/29
2:51 pm-7:59 pm
Nonstop3h 08m
Chicago Greater Rockford
Mon 8/3
9:13 pm-10:35 pm
Nonstop3h 22m
$195
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Wed 5/27
2:59 pm-8:05 pm
Nonstop3h 06m
Chicago Greater Rockford
Wed 6/3
8:50 pm-10:14 pm
Nonstop3h 24m
$197
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Wed 5/13
9:00 am-2:01 pm
Nonstop3h 01m
Chicago Greater Rockford
Fri 5/15
8:35 pm-10:09 pm
Nonstop3h 34m
$197
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 5/22
3:17 pm-8:23 pm
Nonstop3h 06m
Chicago Greater Rockford
Wed 5/27
8:55 pm-10:30 pm
Nonstop3h 35m
$199
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 6/12
3:11 pm-8:20 pm
Nonstop3h 09m
Chicago Greater Rockford
Mon 6/15
9:10 pm-10:34 pm
Nonstop3h 24m
$200
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 5/15
2:44 pm-7:45 pm
Nonstop3h 01m
Chicago Greater Rockford
Mon 5/18
8:35 pm-10:09 pm
Nonstop3h 34m
$206
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Mon 5/18
2:44 pm-7:45 pm
Nonstop3h 01m
Chicago Greater Rockford
Mon 5/25
9:13 pm-10:48 pm
Nonstop3h 35m
$220
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Tue 6/2
2:45 pm-8:27 pm
Nonstop3h 42m
Chicago O'Hare Intl
Wed 6/3
9:05 am-11:06 am
Nonstop4h 01m
$255
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Arizona to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Arizona with our price prediction graph.
LAS-STL
LAS-ORD
LAS-MDW
PHX-STL
AZA-RFD
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 Arizona to Illinois
USAZ-USIL
LAS-STL
LAS-ORD
LAS-MDW
PHX-STL
How far ahead should I book a flight from Arizona to Illinois?
The price you pay for your flight from Arizona to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 38 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Arizona to Illinois?
Currently, September is the cheapest month in which you can book a flight from Arizona to Illinois (average of $265). Flying from Arizona to Illinois in January is currently the most expensive (average of $573). 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 AZ to IL?
Find hourly flight availability from Arizona to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 4, 2026.
It’s typically best to fly out from Arizona to Illinois at noon. Doing so could potentially save you 22% on the flight price compared to flying in the afternoon, which is usually more expensive.
What is the cheapest day to fly from Arizona to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Arizona to Illinois. Price data was last updated on May 2, 2026.
Travelers seeking maximum savings on their Arizona to Illinois flight should consider departing on Monday mornings when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Arizona to Illinois
Explore weekly flight availability from Arizona to Illinois. 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 4, 2026.
The most flights from USAZ to USIL are scheduled on a Sunday (59 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (29 on average).
How much does it cost to fly round-trip from Arizona to Illinois?
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated May 4, 2026.
See what other customers who have flown with Southwest,United Airlines, andAllegiant Air from Arizona to Illinois have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Arizona to Illinois. 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 Arizona to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Arizona to Illinois by cabin class
Find flights from Arizona to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Arizona and Illinois flights
Browse other Arizona and Illinois flight options. Last updated on May 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Illinois
Find the right flight back to Arizona after your stay in Illinois
Arizona to Illinois flights
Consider these flights traveling from Arizona to Illinois.
Top 7 airlines flying from Arizona to Illinois
Discover the top 7 airlines that operate flights from Arizona to Illinois. 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 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$64 | Average$217 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$93 | Average$211 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$158 | Average$206 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$187 | Average$360 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$187 | Average$404 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$197 | Average$434 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$210 | Average$328 | FlexibilityNo cancel fee | On-time75% |