$48+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Jul 18 — Jul 251
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 June 18, 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 June 18, 2026.
This American Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/912:59 am
LAS
- STL
1 stop5h 47m
American Airlines
Mon 7/137:22 pm
STL
- LAS
1 stop6h 26m
American Airlines
Deal found 6/16![American Airlines logo]()
$199
This Cheapflightsfares deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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 7/812:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Sun 7/127:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/17![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” 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 8/206:45 am
LAS
- STL
1 stop8h 45m
Frontier
Sun 8/238:21 pm
STL
- LAS
Nonstop3h 38m
Frontier
Deal found 6/16![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” 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 7/2012:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Thu 7/236:34 pm
STL
- LAS
1 stop27h 52m
Frontier
Deal found 6/16![Frontier logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 6/3012:59 am
LAS
- STL
1 stop16h 24m
Frontier
Tue 7/147:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/13![Frontier logo]()
$206
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” 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 7/219:48 pm
LAS
- STL
2 stops19h 35m
Frontier
Wed 7/297:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/16![Frontier logo]()
$207
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 8/611:25 am
LAS
- STL
2 stops6h 45m
Southwest
Sun 8/98:25 am
STL
- LAS
2 stops6h 25m
Southwest
Deal found 6/14![Southwest logo]()
$209
This Gotogate deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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.
Thu 7/2312:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Mon 7/274:09 pm
STL
- LAS
1 stop21h 55m
Frontier
Deal found 6/17![Frontier logo]()
$210
This Super.com deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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.
Sat 7/256:00 am
LAS
- STL
1 stop6h 56m
Frontier
Wed 7/297:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/15![Frontier logo]()
$211
This Super.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 6/3011:53 pm
LAS
- STL
1 stop6h 59m
Frontier
Tue 7/147:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/13![Frontier logo]()
$212
This Cheapflightsfares deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/296:15 am
LAS
- STL
1 stop10h 38m
Frontier
Sun 7/57:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/13![Frontier logo]()
$215
This Super.com deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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.
Fri 7/1711:49 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Mon 7/207:15 am
ORD
- LAS
Nonstop4h 08m
Frontier
Deal found 6/14![Frontier logo]()
$227
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 June 18, 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 June 18, 2026.
This Southwest deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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 7/235:20 pm
LAS
- STL
1 stop5h 20m
Southwest
Mon 7/275:05 am
STL
- LAS
1 stop5h 05m
Southwest
Deal found 6/17![Southwest logo]()
$199
This Booking.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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.
Thu 8/203:18 pm
LAS
- RFD
Nonstop3h 27m
Allegiant Air
Thu 8/279:35 pm
RFD
- LAS
Nonstop3h 46m
Allegiant Air
Deal found 6/13![Allegiant Air logo]()
$232
This Alaska Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” 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 8/56:50 am
LAS
- ORD
1 stop10h 07m
Alaska Airlines
Tue 8/116:20 am
ORD
- LAS
1 stop9h 38m
Alaska Airlines
Deal found 6/16![Alaska Airlines logo]()
$255
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” 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 7/215:49 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Tue 7/285:00 am
ORD
- PHX
1 stop6h 00m
United Airlines
Deal found 6/16![United Airlines logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:00 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Sun 7/269:19 am
RFD
- LAS
1 stop10h 21m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$258
This Delta deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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 7/151:51 pm
PHX
- ORD
1 stop6h 01m
Delta
Tue 7/216:30 am
ORD
- PHX
1 stop8h 16m
Delta
Deal found 6/15![Delta logo]()
$265
This American Airlines deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2211:45 pm
LAS
- STL
1 stop6h 46m
American Airlines
Sun 7/265:58 pm
STL
- LAS
1 stop7h 56m
American Airlines
Deal found 6/17![American Airlines logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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 10/12:53 pm
LAS
- RFD
Nonstop3h 20m
Allegiant Air
Thu 10/89:03 pm
RFD
- LAS
Nonstop3h 43m
Allegiant Air
Deal found 6/15![Allegiant Air logo]()
$232
This Alaska Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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 8/192:51 pm
LAS
- ORD
1 stop20h 31m
Alaska Airlines
Wed 8/266:01 am
ORD
- LAS
1 stop8h 03m
Alaska Airlines
Deal found 6/15![Alaska Airlines logo]()
$255
This Southwest deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” 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 7/215:45 pm
PHX
- MDW
Nonstop3h 25m
Southwest
Tue 7/285:25 am
MDW
- PHX
Nonstop3h 35m
Southwest
Deal found 6/16![Southwest logo]()
$260
This United Airlines deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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 7/2311:59 pm
LAS
- STL
1 stop6h 40m
United Airlines
Sun 7/265:10 am
STL
- LAS
1 stop5h 57m
United Airlines
Deal found 6/17![United Airlines logo]()
$261
This Delta deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 7/711:04 pm
PHX
- ORD
1 stop6h 55m
Delta
Wed 7/157:45 am
ORD
- PHX
1 stop6h 27m
Delta
Deal found 6/13![Delta logo]()
$265
This Alaska Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 9/157:08 am
PHX
- ORD
1 stop10h 13m
Alaska Airlines
Sat 9/267:20 am
ORD
- PHX
1 stop9h 13m
Alaska Airlines
Deal found 6/13![Alaska Airlines logo]()
$255
This CheapOair deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 6/264:06 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Mon 6/2910:05 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 6/13![Allegiant Air logo]()
$257
This Southwest deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 7/287:10 am
PHX
- MDW
Nonstop3h 20m
Southwest
Tue 8/42:00 pm
MDW
- PHX
1 stop6h 15m
Southwest
Deal found 6/13![Southwest logo]()
$267
This Delta deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 8/89:42 am
PHX
- ORD
1 stop5h 59m
Delta
Wed 8/197:44 pm
ORD
- PHX
1 stop5h 57m
Delta
Deal found 6/13![Delta logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/97:00 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Sun 7/129:19 am
RFD
- LAS
1 stop10h 21m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$305
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” 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 8/102:48 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Thu 8/1310:40 am
ORD
- PHX
1 stop6h 36m
United Airlines
Deal found 6/16![United Airlines logo]()
$279
This Alaska Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 7/186:53 pm
PHX
- ORD
1 stop16h 28m
Alaska Airlines
Tue 7/217:59 pm
ORD
- PHX
1 stop18h 24m
Alaska Airlines
Deal found 6/14![Alaska Airlines logo]()
$255
This CheapOair deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” 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 6/223:11 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Sat 6/271:04 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 6/16![Allegiant Air logo]()
$258
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 8/512:35 am
PHX
- MDW
Nonstop3h 15m
Southwest
Sat 8/85:40 am
MDW
- PHX
Nonstop3h 35m
Southwest
Deal found 6/14![Southwest logo]()
$269
This Delta deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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 9/109:36 am
PHX
- MDW
1 stop6h 43m
Delta
Tue 9/151:14 pm
MDW
- PHX
1 stop7h 13m
Delta
Deal found 6/17![Delta logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 10/2410:12 am
PHX
- ORD
1 stop6h 41m
Alaska Airlines
Tue 10/272:21 pm
ORD
- PHX
1 stop8h 20m
Alaska Airlines
Deal found 6/13![Alaska Airlines logo]()
$255
This United Airlines deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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 9/29:00 am
LAS
- ORD
Nonstop3h 52m
United Airlines
Sat 9/512:45 pm
ORD
- LAS
1 stop6h 14m
United Airlines
Deal found 6/17![United Airlines logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” 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 8/173:25 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Mon 8/241:13 pm
RFD
- AZA
Nonstop3h 20m
Allegiant Air
Deal found 6/16![Allegiant Air logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 8/268:17 pm
LAS
- RFD
2 stops16h 52m
Multiple Airlines
Sun 8/309:35 pm
RFD
- LAS
Nonstop3h 46m
Multiple Airlines
Deal found 6/14![Multiple Airlines logo]()
$333
This Southwest deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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 7/156:35 am
LAS
- STL
Nonstop3h 10m
Southwest
Wed 7/229:15 pm
STL
- LAS
Nonstop3h 30m
Southwest
Deal found 6/15![Southwest logo]()
$279
This United Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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 8/179:00 am
LAS
- ORD
Nonstop3h 52m
United Airlines
Sat 8/2211:00 am
ORD
- LAS
Nonstop4h 07m
United Airlines
Deal found 6/15![United Airlines logo]()
$288
This Delta deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 8/61:20 pm
PHX
- ORD
1 stop6h 10m
Delta
Mon 8/101:59 pm
ORD
- PHX
1 stop9h 33m
Delta
Deal found 6/13![Delta logo]()
$289
This Alaska Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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 7/227:59 am
LAS
- ORD
1 stop8h 58m
Alaska Airlines
Tue 8/117:59 pm
ORD
- LAS
1 stop16h 32m
Alaska Airlines
Deal found 6/15![Alaska Airlines logo]()
$263
Last-minute flights from Arizona to IllinoisDiscover last-minute flight deals from Arizona to Illinois. Data last updated June 18, 2026 and is based on user searches.
Discover last-minute flight deals from Arizona to Illinois. Data last updated June 18, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/296:15 am
LAS
- STL
1 stop10h 38m
Frontier
Sun 7/57:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/13![Frontier logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 6/3012:59 am
LAS
- STL
1 stop16h 24m
Frontier
Tue 7/147:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/13![Frontier logo]()
$206
This Super.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 6/3011:53 pm
LAS
- STL
1 stop6h 59m
Frontier
Tue 7/147:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/13![Frontier logo]()
$212
This Frontier deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” 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 7/46:30 am
LAS
- STL
1 stop10h 23m
Frontier
Thu 7/167:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/16![Frontier logo]()
$209
This Delta deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/49:32 am
LAS
- STL
1 stop5h 14m
Delta
Thu 7/167:55 pm
STL
- LAS
1 stop5h 45m
Delta
Deal found 6/13![Delta logo]()
$217
This Cheapflightsfares deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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 7/812:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Sun 7/127:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/17![Frontier logo]()
$203
This American Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/912:59 am
LAS
- STL
1 stop5h 47m
American Airlines
Mon 7/137:22 pm
STL
- LAS
1 stop6h 26m
American Airlines
Deal found 6/16![American Airlines logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” 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 7/2012:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Thu 7/236:34 pm
STL
- LAS
1 stop27h 52m
Frontier
Deal found 6/16![Frontier logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” 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 7/219:48 pm
LAS
- STL
2 stops19h 35m
Frontier
Wed 7/297:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/16![Frontier logo]()
$207
This Gotogate deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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.
Thu 7/2312:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Mon 7/274:09 pm
STL
- LAS
1 stop21h 55m
Frontier
Deal found 6/17![Frontier logo]()
$210
This Super.com deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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.
Sat 7/256:00 am
LAS
- STL
1 stop6h 56m
Frontier
Wed 7/297:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/15![Frontier logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/307:00 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Sun 8/29:19 am
RFD
- LAS
1 stop10h 21m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$230
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 June 18, 2026.
Search for one-way flight options from Arizona to Illinois. Find affordable one-way fares based on user searches. Data last updated June 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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 8/1512:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$48
This Cheapflightsfares deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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 8/1212:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$49
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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 7/812:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$54
This Cheapflightsfares deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1112:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$55
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” 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 7/1012:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/16![Frontier logo]()
$56
This Kiwi.com deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 7/612:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/14![Frontier logo]()
$64
This Trip.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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 7/149:58 pm
PHX
- STL
1 stop18h 07m
Frontier
Deal found 6/17![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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 7/159:58 pm
PHX
- STL
1 stop18h 17m
Frontier
Deal found 6/17![Frontier logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 7/289:58 pm
PHX
- STL
1 stop18h 07m
Frontier
Deal found 6/14![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 7/82:04 pm
PHX
- STL
1 stop26h 11m
Frontier
Deal found 6/13![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” 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 7/72:04 pm
PHX
- STL
1 stop26h 01m
Frontier
Deal found 6/17![Frontier logo]()
$91
This Cheapflightsfares deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:35 am
LAS
- STL
Nonstop3h 16m
Frontier
Deal found 6/17![Frontier logo]()
$94
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 June 18, 2026.
Round-trip from | $199 (American Airlines) |
|---|---|
One-way from | $48 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $333 |
Good round-trip deal | $143 or less |
Good one-way deal | $99 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 June 18, 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 VegasSt. Louis
LAS - STL
LASSTL
Las Vegas Harry Reid Intl
Thu 7/23
5:20 pm-12:40 am
1 stop5h 20m
Lambert-St Louis
Mon 7/27
5:05 am-8:10 am
1 stop5h 05m
$199
Las VegasChicago
LAS - RFD
LASRFD
Las Vegas Harry Reid Intl
Thu 8/20
3:18 pm-8:45 pm
Nonstop3h 27m
Chicago Greater Rockford
Thu 8/27
9:35 pm-11:21 pm
Nonstop3h 46m
$232
Las VegasChicago
LAS - RFD
LASRFD
Las Vegas Harry Reid Intl
Thu 10/1
2:53 pm-8:13 pm
Nonstop3h 20m
Chicago Greater Rockford
Thu 10/8
9:03 pm-10:46 pm
Nonstop3h 43m
$232
Las VegasChicago
LAS - ORD
LASORD
Las Vegas Harry Reid Intl
Wed 8/5
6:50 am-6:57 pm
1 stop10h 07m
Chicago O'Hare Intl
Tue 8/11
6:20 am-1:58 pm
1 stop9h 38m
$255
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Tue 7/21
5:49 pm-11:31 pm
Nonstop3h 42m
Chicago O'Hare Intl
Tue 7/28
5:00 am-9:00 am
1 stop6h 00m
$255
Las VegasChicago
LAS - ORD
LASORD
Las Vegas Harry Reid Intl
Wed 8/19
2:51 pm-1:22 pm
1 stop20h 31m
Chicago O'Hare Intl
Wed 8/26
6:01 am-12:04 pm
1 stop8h 03m
$255
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Tue 9/15
7:08 am-7:21 pm
1 stop10h 13m
Chicago O'Hare Intl
Sat 9/26
7:20 am-2:33 pm
1 stop9h 13m
$255
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Sat 7/18
6:53 pm-1:21 pm
1 stop16h 28m
Chicago O'Hare Intl
Tue 7/21
7:59 pm-12:23 pm
1 stop18h 24m
$255
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Sat 10/24
10:12 am-6:53 pm
1 stop6h 41m
Chicago O'Hare Intl
Tue 10/27
2:21 pm-8:41 pm
1 stop8h 20m
$255
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 6/26
4:06 pm-9:15 pm
Nonstop3h 09m
Chicago Greater Rockford
Mon 6/29
10:05 pm-11:29 pm
Nonstop3h 24m
$257
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-RFD
LAS-ORD
PHX-ORD
PHX-MDW
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-RFD
LAS-ORD
PHX-ORD
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 $258). Flying from Arizona to Illinois in January is currently the most expensive (average of $569). 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 June 18, 2026.
It’s typically best to fly out from Arizona to Illinois in the morning. Doing so could potentially save you 22% on the flight price compared to flying in the afternoon, 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 June 18, 2026.
The most flights from USAZ to USIL are scheduled on a Thursday (57 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (40 on average).
How much does it cost to fly round-trip from Arizona to Illinois?
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 June 13, 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.
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 June 18, 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.
Overall
7.9
Crew
8.6
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
7.9
Crew
8.6
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
7.9
Crew
8.6
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
7.9
Crew
8.6
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
7.9
Crew
8.6
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
7.9
Crew
8.6
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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 June 18, 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 6 airlines flying from Arizona to Illinois
Discover the top 6 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 June 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$63 | Average$213 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$123 | Average$209 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$158 | Average$247 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$187 | Average$364 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$189 | Average$417 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$198 | Average$461 | FlexibilityNo cancel fee | On-time71% |