$88+ Cheap flights from Phoenix 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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Apr 19 — Apr 261
Round-trip
1 adult, Economy
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Cheapest flights from Phoenix to IllinoisExplore the most affordable flight options available from Phoenix to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 20, 2026.
Explore the most affordable flight options available from Phoenix to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 20, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 3/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:00 am
PHX
- ORD
1 stop25h 13m
Frontier
Sat 4/188:55 am
ORD
- PHX
Nonstop4h 15m
Frontier
Deal found 3/14![Frontier logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 4/221:29 pm
PHX
- ORD
1 stop14h 21m
Frontier
Sun 4/267:50 am
ORD
- PHX
Nonstop4h 22m
Frontier
Deal found 3/17![Frontier logo]()
$133
This Gotogate deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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.
Sat 4/2512:17 pm
PHX
- ORD
Nonstop3h 36m
Frontier
Sun 5/37:45 am
ORD
- PHX
Nonstop4h 22m
Frontier
Deal found 3/18![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 4/185:17 pm
PHX
- ORD
1 stop10h 33m
Frontier
Fri 4/247:50 am
ORD
- PHX
Nonstop4h 22m
Frontier
Deal found 3/17![Frontier logo]()
$138
This CheapOair deal was found by Cheapflights users on 3/16. 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.
Thu 4/169:37 am
PHX
- MDW
Nonstop3h 27m
Frontier
Mon 4/206:20 am
MDW
- PHX
Nonstop3h 57m
Frontier
Deal found 3/16![Frontier logo]()
$138
This eDestinos deal was found by Cheapflights users on 3/17. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:47 pm
PHX
- ORD
1 stop8h 52m
Frontier
Mon 4/136:40 am
ORD
- PHX
Nonstop4h 10m
Frontier
Deal found 3/17![Frontier logo]()
$139
This Super.com deal was found by Cheapflights users on 3/15. 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.
Fri 5/19:07 am
PHX
- MDW
Nonstop3h 27m
Frontier
Sun 5/36:20 am
MDW
- PHX
Nonstop3h 57m
Frontier
Deal found 3/15![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 3/17. 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.
Fri 5/111:19 am
PHX
- ORD
Nonstop3h 41m
Frontier
Sun 5/37:45 am
ORD
- PHX
Nonstop4h 22m
Frontier
Deal found 3/17![Frontier logo]()
$142
This Super.com deal was found by Cheapflights users on 3/15. 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.
Thu 4/169:37 am
PHX
- MDW
Nonstop3h 27m
Frontier
Sun 4/196:20 am
MDW
- PHX
Nonstop3h 57m
Frontier
Deal found 3/15![Frontier logo]()
$142
This Frontier deal was found by Cheapflights users on 3/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2411:19 am
PHX
- ORD
Nonstop3h 41m
Frontier
Sun 4/267:50 am
ORD
- PHX
Nonstop4h 22m
Frontier
Deal found 3/17![Frontier logo]()
$143
This Frontier deal was found by Cheapflights users on 3/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/19:07 am
PHX
- MDW
Nonstop3h 27m
Frontier
Mon 5/46:20 am
MDW
- PHX
Nonstop3h 57m
Frontier
Deal found 3/17![Frontier logo]()
$143
This Booking.com deal was found by Cheapflights users on 3/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/244:34 pm
PHX
- MDW
Nonstop3h 16m
Frontier
Sun 4/266:20 am
MDW
- PHX
Nonstop3h 57m
Frontier
Deal found 3/17![Frontier logo]()
$144
Best flights from Phoenix to IllinoisDiscover carefully curated flight deals from Phoenix to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 20, 2026.
Discover carefully curated flight deals from Phoenix to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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 5/82:44 pm
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Mon 5/118:35 pm
RFD
- AZA
Nonstop3h 34m
Allegiant Air
Deal found 3/19![Allegiant Air logo]()
$154
This United Airlines deal was found by Cheapflights users on 3/17. 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.
Sat 5/235:49 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Wed 5/279:42 pm
ORD
- PHX
Nonstop3h 54m
United Airlines
Deal found 3/17![United Airlines logo]()
$246
This Southwest deal was found by Cheapflights users on 3/14. 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 4/156:05 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Fri 4/177:40 pm
MDW
- PHX
Nonstop3h 45m
Southwest
Deal found 3/14![Southwest logo]()
$256
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 6/1212:59 am
PHX
- MDW
1 stop5h 39m
Delta
Sat 6/136:45 pm
MDW
- PHX
1 stop6h 11m
Delta
Deal found 3/18![Delta logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 4/1412:58 pm
PHX
- STL
1 stop15h 52m
Frontier
Wed 4/154:59 pm
STL
- PHX
1 stop8h 04m
Frontier
Deal found 3/14![Frontier logo]()
$286
This Booking.com deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 5/69:00 am
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Mon 5/118:35 pm
RFD
- AZA
Nonstop3h 34m
Allegiant Air
Deal found 3/18![Allegiant Air logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Mon 6/294:06 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Sat 7/41:03 pm
RFD
- AZA
Nonstop3h 22m
Allegiant Air
Deal found 3/15![Allegiant Air logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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 4/1612:30 am
PHX
- EVV
1 stop16h 36m
Multiple Airlines
Fri 4/247:46 pm
EVV
- PHX
1 stop29h 32m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$453
This United Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 5/97:00 am
PHX
- ORD
Nonstop3h 36m
United Airlines
Mon 5/119:45 pm
ORD
- PHX
Nonstop4h 08m
United Airlines
Deal found 3/18![United Airlines logo]()
$251
This Mytrip deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:05 am
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Wed 5/278:55 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Deal found 3/18![Allegiant Air logo]()
$210
This Southwest deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/226:30 pm
PHX
- ORD
Nonstop3h 25m
Southwest
Sun 4/268:00 am
ORD
- PHX
Nonstop3h 55m
Southwest
Deal found 3/18![Southwest logo]()
$257
This American Airlines deal was found by Cheapflights users on 3/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/318:35 am
PHX
- EVV
1 stop7h 01m
American Airlines
Sat 4/43:50 pm
EVV
- PHX
1 stop8h 48m
American Airlines
Deal found 3/15![American Airlines logo]()
$561
This Booking.com deal was found by Cheapflights users on 3/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/159:00 am
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Mon 4/208:35 pm
RFD
- AZA
Nonstop3h 34m
Allegiant Air
Deal found 3/16![Allegiant Air logo]()
$211
This Southwest deal was found by Cheapflights users on 3/16. 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.
Wed 4/153:45 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Mon 4/205:25 am
MDW
- PHX
Nonstop3h 45m
Southwest
Deal found 3/16![Southwest logo]()
$260
This Delta deal was found by Cheapflights users on 3/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/710:55 pm
PHX
- MDW
1 stop7h 48m
Delta
Sun 5/107:13 pm
MDW
- PHX
1 stop6h 16m
Delta
Deal found 3/16![Delta logo]()
$297
This Gotogate deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/172:44 pm
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Mon 4/208:35 pm
RFD
- AZA
Nonstop3h 34m
Allegiant Air
Deal found 3/18![Allegiant Air logo]()
$211
This Southwest deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/811:55 pm
PHX
- MDW
Nonstop3h 05m
Southwest
Sat 4/113:15 pm
MDW
- PHX
Nonstop3h 45m
Southwest
Deal found 3/18![Southwest logo]()
$262
This Booking.com deal was found by Cheapflights users on 3/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/32:51 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Mon 6/89:10 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 3/17![Allegiant Air logo]()
$215
This United Airlines deal was found by Cheapflights users on 3/15. 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.
Wed 6/175:49 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Mon 6/225:45 pm
ORD
- PHX
1 stop6h 40m
United Airlines
Deal found 3/15![United Airlines logo]()
$316
This Southwest deal was found by Cheapflights users on 3/16. 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.
Wed 4/151:25 pm
PHX
- ORD
Nonstop3h 25m
Southwest
Wed 4/224:50 pm
ORD
- PHX
1 stop6h 25m
Southwest
Deal found 3/16![Southwest logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 3/16. 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.
Wed 7/82:51 pm
AZA
- RFD
Nonstop3h 08m
Allegiant Air
Wed 7/158:49 pm
RFD
- AZA
Nonstop3h 22m
Allegiant Air
Deal found 3/16![Allegiant Air logo]()
$219
This Southwest deal was found by Cheapflights users on 3/14. 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.
Sun 5/1711:55 pm
PHX
- ORD
1 stop7h 50m
Southwest
Wed 5/207:15 pm
ORD
- PHX
Nonstop3h 55m
Southwest
Deal found 3/14![Southwest logo]()
$266
This United Airlines deal was found by Cheapflights users on 3/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/225:49 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Mon 8/106:10 pm
ORD
- PHX
1 stop6h 49m
United Airlines
Deal found 3/14![United Airlines logo]()
$347
This Southwest deal was found by Cheapflights users on 3/14. 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.
Fri 5/155:00 am
PHX
- ORD
1 stop5h 50m
Southwest
Sun 5/178:00 am
ORD
- PHX
Nonstop3h 55m
Southwest
Deal found 3/14![Southwest logo]()
$267
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 7/313:15 pm
AZA
- RFD
Nonstop3h 08m
Allegiant Air
Wed 8/58:58 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Deal found 3/16![Allegiant Air logo]()
$221
This United Airlines deal was found by Cheapflights users on 3/17. 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.
Fri 4/2411:59 pm
PHX
- ORD
Nonstop3h 30m
United Airlines
Tue 4/287:20 am
ORD
- PHX
Nonstop4h 02m
United Airlines
Deal found 3/17![United Airlines logo]()
$348
This Booking.com deal was found by Cheapflights users on 3/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/102:44 pm
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Mon 4/138:35 pm
RFD
- AZA
Nonstop3h 34m
Allegiant Air
Deal found 3/14![Allegiant Air logo]()
$227
This Southwest deal was found by Cheapflights users on 3/17. 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 5/79:55 pm
PHX
- MDW
1 stop5h 30m
Southwest
Mon 5/116:55 am
MDW
- PHX
Nonstop3h 50m
Southwest
Deal found 3/17![Southwest logo]()
$275
This United Airlines deal was found by Cheapflights users on 3/17. 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.
Tue 4/217:00 am
PHX
- PIA
1 stop7h 44m
United Airlines
Sat 4/256:30 am
PIA
- PHX
1 stop6h 50m
United Airlines
Deal found 3/17![United Airlines logo]()
$371
This Southwest deal was found by Cheapflights users on 3/15. 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.
Thu 4/95:05 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Sun 4/126:55 am
MDW
- PHX
Nonstop3h 50m
Southwest
Deal found 3/15![Southwest logo]()
$285
Last-minute flights from Phoenix to IllinoisDiscover last-minute flight deals from Phoenix to Illinois. Data last updated March 20, 2026 and is based on user searches.
Discover last-minute flight deals from Phoenix to Illinois. Data last updated March 20, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 3/16. 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.
Wed 3/2510:24 am
PHX
- ORD
Nonstop3h 35m
Frontier
Sun 4/197:50 am
ORD
- PHX
Nonstop4h 22m
Frontier
Deal found 3/16![Frontier logo]()
$145
This eDestinos deal was found by Cheapflights users on 3/17. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:47 pm
PHX
- ORD
1 stop8h 52m
Frontier
Mon 4/136:40 am
ORD
- PHX
Nonstop4h 10m
Frontier
Deal found 3/17![Frontier logo]()
$139
This CheapOair deal was found by Cheapflights users on 3/16. 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.
Thu 4/169:37 am
PHX
- MDW
Nonstop3h 27m
Frontier
Mon 4/206:20 am
MDW
- PHX
Nonstop3h 57m
Frontier
Deal found 3/16![Frontier logo]()
$138
This Super.com deal was found by Cheapflights users on 3/15. 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.
Thu 4/169:37 am
PHX
- MDW
Nonstop3h 27m
Frontier
Sun 4/196:20 am
MDW
- PHX
Nonstop3h 57m
Frontier
Deal found 3/15![Frontier logo]()
$142
This Super.com deal was found by Cheapflights users on 3/15. 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.
Fri 4/179:07 am
PHX
- MDW
Nonstop3h 27m
Frontier
Sun 4/196:20 am
MDW
- PHX
Nonstop3h 57m
Frontier
Deal found 3/15![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 4/185:17 pm
PHX
- ORD
1 stop10h 33m
Frontier
Fri 4/247:50 am
ORD
- PHX
Nonstop4h 22m
Frontier
Deal found 3/17![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 4/218:07 pm
PHX
- ORD
1 stop8h 01m
Frontier
Fri 4/247:50 am
ORD
- PHX
Nonstop4h 22m
Frontier
Deal found 3/17![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Wed 4/221:29 pm
PHX
- ORD
1 stop14h 21m
Frontier
Fri 4/247:50 am
ORD
- PHX
Nonstop4h 22m
Frontier
Deal found 3/15![Frontier logo]()
$133
This Cheapflightsfares deal was found by Cheapflights users on 3/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:19 am
PHX
- ORD
Nonstop3h 41m
Frontier
Sun 4/267:50 am
ORD
- PHX
Nonstop4h 22m
Frontier
Deal found 3/16![Frontier logo]()
$142
This Frontier deal was found by Cheapflights users on 3/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2411:19 am
PHX
- ORD
Nonstop3h 41m
Frontier
Sun 4/267:50 am
ORD
- PHX
Nonstop4h 22m
Frontier
Deal found 3/17![Frontier logo]()
$143
This Booking.com deal was found by Cheapflights users on 3/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/244:34 pm
PHX
- MDW
Nonstop3h 16m
Frontier
Sun 4/266:20 am
MDW
- PHX
Nonstop3h 57m
Frontier
Deal found 3/17![Frontier logo]()
$144
This Gotogate deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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.
Sat 4/2512:17 pm
PHX
- ORD
Nonstop3h 36m
Frontier
Sun 5/37:45 am
ORD
- PHX
Nonstop4h 22m
Frontier
Deal found 3/18![Frontier logo]()
$134
One-way flights from Phoenix to IllinoisSearch for one-way flight options from Phoenix to Illinois. Find affordable one-way fares based on user searches. Data last updated March 20, 2026.
Search for one-way flight options from Phoenix to Illinois. Find affordable one-way fares based on user searches. Data last updated March 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 4/186:50 am
PHX
- STL
1 stop10h 42m
Frontier
Deal found 3/17![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 4/185:17 pm
PHX
- ORD
1 stop10h 33m
Frontier
Deal found 3/17![Frontier logo]()
$93
This Cheapflightsfares deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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.
Tue 3/3110:44 am
PHX
- ORD
Nonstop3h 35m
Frontier
Deal found 3/18![Frontier logo]()
$94
This Priceline deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:37 am
PHX
- MDW
Nonstop3h 27m
Frontier
Deal found 3/18![Frontier logo]()
$94
This Trip.com deal was found by Cheapflights users on 3/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/151:29 pm
PHX
- ORD
1 stop14h 21m
Frontier
Deal found 3/16![Frontier logo]()
$95
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 5/126:53 pm
PHX
- ORD
1 stop23h 44m
Frontier
Deal found 3/16![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 4/259:52 am
PHX
- STL
1 stop7h 40m
Frontier
Deal found 3/17![Frontier logo]()
$97
This Super.com deal was found by Cheapflights users on 3/15. 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.
Fri 4/179:07 am
PHX
- MDW
Nonstop3h 27m
Frontier
Deal found 3/15![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 5/82:44 pm
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Deal found 3/18![Allegiant Air logo]()
$98
This Cheapflightsfares deal was found by Cheapflights users on 3/17. 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.
Thu 4/2311:19 am
PHX
- ORD
Nonstop3h 41m
Frontier
Deal found 3/17![Frontier logo]()
$99
This Trip.com deal was found by Cheapflights users on 3/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/142:05 pm
PHX
- ORD
1 stop14h 03m
Frontier
Deal found 3/15![Frontier logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 5/165:15 am
PHX
- STL
1 stop12h 08m
Frontier
Deal found 3/17![Frontier logo]()
$100
Find flight deals from Phoenix to Illinois
Keep the following information in mind while searching for Phoenix to Illinois flight deals. Data was last updated March 20, 2026.
Round-trip from | $133 (Kiwi.com) |
|---|---|
One-way from | $88 (Kiwi.com) |
Popular in | December |
Cheapest in | February |
Average price | $304 |
Cheapflights Fare Finder
Customize your flight search to find flights from Phoenix 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 March 20, 2026.
Use the filters below to find and compare flights from Phoenix to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 5/8
2:44 pm-7:45 pm
Nonstop3h 01m
Chicago Greater Rockford
Mon 5/11
8:35 pm-10:09 pm
Nonstop3h 34m
$154
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Wed 5/6
9:00 am-2:01 pm
Nonstop3h 01m
Chicago Greater Rockford
Mon 5/11
8:35 pm-10:09 pm
Nonstop3h 34m
$172
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Mon 6/29
4:06 pm-9:15 pm
Nonstop3h 09m
Chicago Greater Rockford
Sat 7/4
1:03 pm-2:25 pm
Nonstop3h 22m
$189
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Sat 5/23
7:05 am-12:11 pm
Nonstop3h 06m
Chicago Greater Rockford
Wed 5/27
8:55 pm-10:30 pm
Nonstop3h 35m
$210
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Wed 4/15
9:00 am-2:01 pm
Nonstop3h 01m
Chicago Greater Rockford
Mon 4/20
8:35 pm-10:09 pm
Nonstop3h 34m
$211
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 4/17
2:44 pm-7:45 pm
Nonstop3h 01m
Chicago Greater Rockford
Mon 4/20
8:35 pm-10:09 pm
Nonstop3h 34m
$211
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Wed 6/3
2:51 pm-8:00 pm
Nonstop3h 09m
Chicago Greater Rockford
Mon 6/8
9:10 pm-10:34 pm
Nonstop3h 24m
$215
Quickest round-trip
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Wed 7/8
2:51 pm-7:59 pm
Nonstop3h 08m
Chicago Greater Rockford
Wed 7/15
8:49 pm-10:11 pm
Nonstop3h 22m
$219
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 7/31
3:15 pm-8:23 pm
Nonstop3h 08m
Chicago Greater Rockford
Wed 8/5
8:58 pm-10:33 pm
Nonstop3h 35m
$221
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 4/10
2:44 pm-7:45 pm
Nonstop3h 01m
Chicago Greater Rockford
Mon 4/13
8:35 pm-10:09 pm
Nonstop3h 34m
$227
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Phoenix to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Phoenix with our price prediction graph.
AZA-RFD
PHX-MDW
PHX-STL
PHX-ORD
PHX-MLI
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 Phoenix to Illinois
PH1-USIL
AZA-RFD
PHX-MDW
PHX-STL
PHX-ORD
What is the cheapest month to book a flight from Phoenix to Illinois?
Currently, February is the cheapest month in which you can book a flight from Phoenix to Illinois (average of $58). Flying from Phoenix to Illinois in June is currently the most expensive (average of $178). 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 PHX to IL?
Find hourly flight availability from Phoenix 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 March 20, 2026.
A simple way to save on the total cost of your ticket is to fly from Phoenix to Illinois at noon. If you’re flexible enough to do this you can expect to save up to 4% on your trip compared to booking a flight in the evening.
What is the cheapest day to fly from Phoenix to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Phoenix to Illinois. Price data was last updated on March 14, 2026.
Travelers seeking maximum savings on their Phoenix to Illinois flight should consider departing on Monday mornings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Phoenix to Illinois
Explore weekly flight availability from Phoenix 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 March 20, 2026.
The most flights from PH1 to USIL are scheduled on a Thursday (58 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (41 on average).
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 March 20, 2026.
See what other customers who have flown with Southwest,United Airlines, andAllegiant Air from Phoenix to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Phoenix to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Phoenix to Illinois
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Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Phoenix to Illinois by cabin class
Find flights from Phoenix to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Phoenix and Illinois flights
Browse other Phoenix and Illinois flight options. Last updated on March 20, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Phoenix to Illinois flights
Consider these flights traveling from Phoenix to Illinois.
Top 6 airlines flying from Phoenix to Illinois
Discover the top 6 airlines that operate flights from Phoenix 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 March 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$65 | Average$205 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$93 | Average$218 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$118 | Average$293 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$149 | Average$358 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$187 | Average$319 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$197 | Average$425 | FlexibilityNo cancel fee | On-time71% |