$67+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Aug 31 — Sep 71
Round-trip
1 adult, Economy
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Find cheap flights from Arizona to Illinois with Cheapflights
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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 August 1, 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 August 1, 2026.
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:29 pm
LAS
- STL
1 stop20h 41m
Alaska Airlines
Tue 9/226:29 am
STL
- LAS
1 stop11h 03m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 9/239:15 am
PHX
- STL
1 stop8h 02m
Frontier
Tue 10/208:10 pm
STL
- PHX
1 stop13h 01m
Frontier
Deal found 7/28![Frontier logo]()
$152
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 9/169:15 am
PHX
- STL
1 stop8h 02m
Frontier
Wed 9/238:10 pm
STL
- PHX
1 stop13h 50m
Frontier
Deal found 7/31![Frontier logo]()
$153
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.
Thu 9/109:30 am
LAS
- STL
1 stop12h 29m
Alaska Airlines
Tue 9/153:19 pm
STL
- LAS
1 stop9h 58m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$157
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 9/99:45 am
LAS
- STL
1 stop7h 32m
Frontier
Wed 9/168:10 pm
STL
- LAS
1 stop14h 18m
Frontier
Deal found 7/29![Frontier logo]()
$163
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 9/239:45 am
LAS
- STL
1 stop7h 32m
Frontier
Mon 9/288:10 pm
STL
- LAS
1 stop14h 18m
Frontier
Deal found 7/30![Frontier logo]()
$165
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 9/158:56 pm
PHX
- STL
1 stop20h 21m
Frontier
Sat 9/198:10 pm
STL
- PHX
1 stop13h 50m
Frontier
Deal found 7/30![Frontier logo]()
$172
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.
Fri 10/96:36 pm
PHX
- STL
1 stop22h 39m
Frontier
Tue 10/138:10 pm
STL
- PHX
1 stop22h 52m
Frontier
Deal found 7/31![Frontier logo]()
$173
This Travelocity deal was found by Cheapflights users on 7/28. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/114:25 pm
LAS
- STL
1 stop19h 56m
Alaska Airlines
Mon 9/143:19 pm
STL
- LAS
1 stop9h 58m
Alaska Airlines
Deal found 7/28![Alaska Airlines logo]()
$177
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 9/22:15 pm
PHX
- STL
1 stop26h 58m
Frontier
Wed 9/98:10 pm
STL
- PHX
1 stop13h 50m
Frontier
Deal found 7/30![Frontier logo]()
$178
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:15 am
LAS
- STL
Nonstop3h 17m
Multiple Airlines
Tue 9/226:29 am
STL
- LAS
1 stop9h 12m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$178
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.
Thu 10/158:30 am
LAS
- STL
1 stop8h 45m
Frontier
Sun 10/188:10 pm
STL
- LAS
1 stop13h 15m
Frontier
Deal found 7/29![Frontier logo]()
$179
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 August 1, 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 August 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 9/112:58 pm
LAS
- ORD
1 stop7h 25m
Frontier
Tue 9/156:30 am
ORD
- LAS
1 stop9h 37m
Frontier
Deal found 7/26![Frontier logo]()
$222
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.
Mon 10/267:30 am
AZA
- RFD
Nonstop3h 07m
Allegiant Air
Fri 11/611:23 am
RFD
- AZA
Nonstop3h 31m
Allegiant Air
Deal found 7/30![Allegiant Air logo]()
$245
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.
Mon 8/319:00 am
PHX
- ORD
Nonstop3h 43m
United Airlines
Sat 9/261:56 pm
ORD
- PHX
Nonstop3h 47m
United Airlines
Deal found 7/29![United Airlines logo]()
$253
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.
Sun 8/2312:35 am
PHX
- MDW
Nonstop3h 15m
Southwest
Tue 8/259:25 am
MDW
- PHX
Nonstop3h 35m
Southwest
Deal found 7/29![Southwest logo]()
$253
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.
Thu 8/278:02 am
LAS
- STL
1 stop7h 08m
Alaska Airlines
Mon 8/316:35 am
STL
- LAS
1 stop10h 53m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$253
This Delta deal was found by Cheapflights users on 7/28. 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 8/221:58 pm
PHX
- ORD
1 stop5h 49m
Delta
Mon 8/247:44 pm
ORD
- PHX
1 stop6h 28m
Delta
Deal found 7/28![Delta logo]()
$273
This Expedia deal was found by Cheapflights users on 7/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:08 am
PHX
- STL
2 stops14h 51m
Multiple Airlines
Sun 9/2012:27 pm
STL
- PHX
1 stop5h 51m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$305
This CheapOair deal was found by Cheapflights users on 7/27. 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.
Mon 8/173:25 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Mon 8/241:13 pm
RFD
- AZA
Nonstop3h 20m
Allegiant Air
Deal found 7/27![Allegiant Air logo]()
$247
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.
Sat 10/36:55 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Tue 10/68:45 pm
MDW
- PHX
Nonstop3h 45m
Southwest
Deal found 7/30![Southwest logo]()
$253
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 9/167:49 pm
PHX
- STL
2 stops19h 21m
Alaska Airlines
Wed 9/236:29 am
STL
- PHX
2 stops14h 38m
Alaska Airlines
Deal found 7/30![Alaska Airlines 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.
Wed 9/99:45 am
PHX
- ORD
Nonstop3h 45m
United Airlines
Thu 9/175:00 am
ORD
- PHX
1 stop6h 04m
United Airlines
Deal found 7/29![United Airlines logo]()
$263
This CheapOair deal was found by Cheapflights users on 7/27. 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 8/217:10 am
AZA
- RFD
Nonstop3h 13m
Allegiant Air
Mon 8/241:13 pm
RFD
- AZA
Nonstop3h 20m
Allegiant Air
Deal found 7/27![Allegiant Air logo]()
$247
This Southwest deal was found by Cheapflights users on 7/26. 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 10/14:45 pm
PHX
- MDW
1 stop5h 50m
Southwest
Wed 10/75:45 am
MDW
- PHX
Nonstop3h 45m
Southwest
Deal found 7/26![Southwest logo]()
$259
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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 9/58:45 am
LAS
- ORD
1 stop8h 36m
Alaska Airlines
Tue 9/87:20 am
ORD
- LAS
1 stop8h 51m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$260
This United Airlines deal was found by Cheapflights users on 7/26. 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 8/229:00 am
PHX
- ORD
Nonstop3h 43m
United Airlines
Mon 8/241:30 pm
ORD
- PHX
1 stop5h 40m
United Airlines
Deal found 7/26![United Airlines logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 8/1710:13 pm
LAS
- STL
2 stops16h 03m
Frontier
Thu 8/207:58 pm
STL
- LAS
1 stop5h 49m
Frontier
Deal found 7/26![Frontier logo]()
$302
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.
Tue 9/159:30 am
PHX
- MDW
Nonstop3h 15m
Southwest
Tue 9/2210:10 am
MDW
- PHX
1 stop4h 50m
Southwest
Deal found 7/29![Southwest logo]()
$259
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 9/118:45 am
LAS
- ORD
1 stop8h 36m
Alaska Airlines
Mon 9/147:20 am
ORD
- LAS
1 stop6h 44m
Alaska Airlines
Deal found 7/29![Alaska 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.
Mon 9/142:21 pm
PHX
- ORD
Nonstop3h 39m
United Airlines
Mon 9/215:00 am
ORD
- PHX
1 stop6h 04m
United Airlines
Deal found 7/29![United Airlines logo]()
$263
This Gotogate deal was found by Cheapflights users on 7/27. 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 8/33:15 pm
AZA
- RFD
Nonstop3h 08m
Allegiant Air
Fri 8/79:24 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Deal found 7/27![Allegiant Air logo]()
$265
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1011:05 pm
PHX
- MDW
1 stop8h 02m
Delta
Tue 9/159:29 am
MDW
- PHX
1 stop6h 25m
Delta
Deal found 7/29![Delta logo]()
$336
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1010:30 am
LAS
- STL
1 stop11h 29m
Alaska Airlines
Wed 9/166:29 am
STL
- LAS
2 stops13h 58m
Alaska Airlines
Deal found 7/31![Alaska Airlines logo]()
$260
This United Airlines deal was found by Cheapflights users on 7/26. 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 9/81:34 pm
PHX
- ORD
1 stop6h 25m
United Airlines
Sat 9/197:45 pm
ORD
- PHX
Nonstop3h 52m
United Airlines
Deal found 7/26![United Airlines logo]()
$263
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 8/204:05 pm
PHX
- MDW
1 stop5h 15m
Southwest
Wed 8/2610:10 am
MDW
- PHX
1 stop4h 50m
Southwest
Deal found 7/29![Southwest logo]()
$268
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/282:45 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Fri 10/212:17 pm
RFD
- AZA
Nonstop3h 31m
Allegiant Air
Deal found 7/30![Allegiant Air logo]()
$275
This Frontier deal was found by Cheapflights users on 7/26. 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.
Thu 8/612:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Sun 8/93:41 pm
STL
- LAS
1 stop10h 06m
Frontier
Deal found 7/26![Frontier logo]()
$350
This Alaska Airlines deal was found by Cheapflights users on 7/26. 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 9/28:45 am
LAS
- ORD
1 stop8h 36m
Alaska Airlines
Mon 9/76:01 am
ORD
- LAS
1 stop8h 03m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$265
This Delta deal was found by Cheapflights users on 7/28. 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 8/256:00 am
PHX
- STL
1 stop5h 38m
Delta
Wed 8/2611:13 am
STL
- PHX
1 stop6h 48m
Delta
Deal found 7/28![Delta logo]()
$359
This Southwest deal was found by Cheapflights users on 7/27. 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 8/283:05 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Wed 9/165:20 pm
MDW
- PHX
Nonstop3h 40m
Southwest
Deal found 7/27![Southwest logo]()
$278
This Booking.com deal was found by Cheapflights users on 7/28. 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 9/28:10 am
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Mon 9/71:39 pm
RFD
- AZA
Nonstop3h 25m
Allegiant Air
Deal found 7/28![Allegiant Air logo]()
$282
Last-minute flights from Arizona to IllinoisDiscover last-minute flight deals from Arizona to Illinois. Data last updated August 1, 2026 and is based on user searches.
Discover last-minute flight deals from Arizona to Illinois. Data last updated August 1, 2026 and is based on user searches.
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1911:50 pm
LAS
- MDW
1 stop9h 05m
Frontier
Sat 8/226:05 am
MDW
- LAS
1 stop8h 24m
Frontier
Deal found 7/30![Frontier logo]()
$213
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.
Thu 8/206:35 am
PHX
- STL
1 stop10h 38m
Frontier
Sun 8/237:58 pm
STL
- PHX
1 stop16h 13m
Frontier
Deal found 7/29![Frontier logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/208:35 am
PHX
- STL
1 stop8h 38m
Frontier
Thu 8/277:58 pm
STL
- PHX
1 stop5h 41m
Frontier
Deal found 7/27![Frontier logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/201:40 pm
LAS
- ORD
1 stop9h 09m
Frontier
Thu 8/278:11 pm
ORD
- LAS
Nonstop4h 12m
Frontier
Deal found 7/27![Frontier logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/246:00 am
LAS
- STL
1 stop11h 13m
Frontier
Mon 10/268:10 pm
STL
- LAS
1 stop15h 20m
Frontier
Deal found 7/28![Frontier logo]()
$186
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.
Mon 8/248:35 am
PHX
- STL
1 stop8h 38m
Frontier
Mon 8/317:58 pm
STL
- PHX
1 stop16h 13m
Frontier
Deal found 7/30![Frontier logo]()
$192
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.
Mon 8/248:35 am
PHX
- STL
1 stop8h 38m
Frontier
Tue 8/255:27 pm
STL
- PHX
1 stop7h 33m
Frontier
Deal found 7/30![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/248:35 am
PHX
- STL
1 stop8h 38m
Frontier
Thu 8/277:58 pm
STL
- PHX
1 stop5h 41m
Frontier
Deal found 7/28![Frontier logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/278:15 am
LAS
- STL
1 stop8h 58m
Frontier
Mon 8/317:58 pm
STL
- LAS
1 stop5h 49m
Frontier
Deal found 7/27![Frontier logo]()
$194
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.
Thu 8/276:35 am
PHX
- STL
1 stop10h 38m
Frontier
Mon 8/317:58 pm
STL
- PHX
1 stop16h 13m
Frontier
Deal found 7/29![Frontier logo]()
$196
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2812:25 pm
LAS
- STL
Nonstop3h 25m
Multiple Airlines
Mon 8/316:35 am
STL
- LAS
1 stop10h 53m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$188
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.
Fri 8/2812:25 pm
LAS
- STL
Nonstop3h 25m
Frontier
Mon 8/317:58 pm
STL
- LAS
1 stop19h 49m
Frontier
Deal found 7/31![Frontier logo]()
$202
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 August 1, 2026.
Search for one-way flight options from Arizona to Illinois. Find affordable one-way fares based on user searches. Data last updated August 1, 2026.
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/68:44 pm
LAS
- STL
1 stop20h 33m
Frontier
Deal found 7/31![Frontier logo]()
$67
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/309:45 am
LAS
- STL
1 stop7h 32m
Frontier
Deal found 7/31![Frontier logo]()
$68
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:02 am
LAS
- STL
1 stop7h 08m
Alaska Airlines
Deal found 7/30![Alaska Airlines logo]()
$69
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 9/309:15 am
PHX
- STL
1 stop8h 02m
Frontier
Deal found 7/31![Frontier logo]()
$73
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:29 pm
LAS
- STL
1 stop20h 41m
Alaska Airlines
Deal found 7/30![Alaska Airlines logo]()
$74
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 9/298:56 pm
PHX
- STL
1 stop20h 21m
Frontier
Deal found 7/31![Frontier logo]()
$76
This Trip.com deal was found by Cheapflights users on 7/28. 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.
Wed 10/79:15 am
PHX
- STL
1 stop8h 02m
Frontier
Deal found 7/28![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 10/68:56 pm
PHX
- STL
1 stop20h 21m
Frontier
Deal found 7/28![Frontier logo]()
$79
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 9/82:53 pm
LAS
- STL
1 stop26h 24m
Frontier
Deal found 7/30![Frontier logo]()
$81
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 9/99:45 am
LAS
- STL
1 stop7h 32m
Frontier
Deal found 7/31![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/269:04 pm
LAS
- STL
1 stop20h 09m
Frontier
Deal found 7/28![Frontier logo]()
$86
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 9/117:02 am
LAS
- STL
1 stop8h 08m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$89
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 August 1, 2026.
Round-trip from | $137 (Expedia) |
|---|---|
One-way from | $67 (Trip.com) |
Popular in | June |
Cheapest in | February |
Average price | $277 |
Good round-trip deal | $150 or less |
Good one-way deal | $71 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 August 1, 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
Las VegasChicago
LAS - ORD
LASORD
Las Vegas Harry Reid Intl
Fri 9/11
2:58 pm-12:23 am
1 stop7h 25m
Chicago O'Hare Intl
Tue 9/15
6:30 am-2:07 pm
1 stop9h 37m
$222
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Mon 10/26
7:30 am-12:37 pm
Nonstop3h 07m
Chicago Greater Rockford
Fri 11/6
11:23 am-1:54 pm
Nonstop3h 31m
$245
Quickest round-trip
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Mon 8/17
3:25 pm-8:34 pm
Nonstop3h 09m
Chicago Greater Rockford
Mon 8/24
1:13 pm-2:33 pm
Nonstop3h 20m
$247
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 8/21
7:10 am-12:23 pm
Nonstop3h 13m
Chicago Greater Rockford
Mon 8/24
1:13 pm-2:33 pm
Nonstop3h 20m
$247
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Mon 8/31
9:00 am-2:43 pm
Nonstop3h 43m
Chicago O'Hare Intl
Sat 9/26
1:56 pm-3:43 pm
Nonstop3h 47m
$253
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
Sun 8/23
12:35 am-5:50 am
Nonstop3h 15m
Chicago Midway
Tue 8/25
9:25 am-11:00 am
Nonstop3h 35m
$253
Las VegasSt. Louis
LAS - STL
LASSTL
Las Vegas Harry Reid Intl
Thu 8/27
8:02 am-5:10 pm
1 stop7h 08m
Lambert-St Louis
Mon 8/31
6:35 am-3:28 pm
1 stop10h 53m
$253
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
Sat 10/3
6:55 pm-12:10 am
Nonstop3h 15m
Chicago Midway
Tue 10/6
8:45 pm-10:30 pm
Nonstop3h 45m
$253
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Wed 9/16
7:49 pm-5:10 pm
2 stops19h 21m
Lambert-St Louis
Wed 9/23
6:29 am-7:07 pm
2 stops14h 38m
$253
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
Thu 10/1
4:45 pm-12:35 am
1 stop5h 50m
Chicago Midway
Wed 10/7
5:45 am-7:30 am
Nonstop3h 45m
$259
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
PHX-STL
LAS-ORD
LAS-MDW
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
PHX-STL
LAS-ORD
LAS-MDW
What is the cheapest month to book a flight from Arizona to Illinois?
Currently, January is the cheapest month in which you can book a flight from Arizona to Illinois (average of $227). Flying from Arizona to Illinois in June is currently the most expensive (average of $373). 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 August 1, 2026.
It’s typically best to fly out from Arizona to Illinois in the morning. Doing so could potentially save you 25% on the flight price compared to flying in the evening, which is usually more expensive.
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 August 1, 2026.
The most flights from USAZ to USIL are scheduled on a Friday (56 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (5 on average).
How much does it cost to fly round-trip from Arizona to Illinois?
Airfare is typical for this route at the moment.
Arizona to Illinois flights typically cost between $234 and $366 in October.The cheapest round-trip price found within the last 5 days was $243 on Frontier (Oct 8-Oct 13).
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 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 July 25, 2026.
Travelers seeking maximum savings on their Arizona to Illinois flight should consider departing on Sunday afternoons 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.
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 August 1, 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.
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
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 August 1, 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 August 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$60 | Average$209 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$118 | Average$286 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$124 | Average$207 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$173 | Average$247 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$187 | Average$375 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$192 | Average$417 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$198 | Average$459 | FlexibilityNo cancel fee | On-time71% |