$80+ 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 5/23. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Jun 3 — Jun 101
Round-trip
1 adult, Economy
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Cheapest flights from 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 May 4, 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 May 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:53 pm
PHX
- STL
1 stop22h 30m
Frontier
Tue 8/188:08 pm
STL
- PHX
1 stop21h 16m
Frontier
Deal found 4/29![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/137:05 am
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Wed 6/178:50 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 4/29![Allegiant Air logo]()
$188
This Gotogate deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/53:11 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Mon 6/89:10 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 4/30![Allegiant Air logo]()
$189
This eDestinos deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:40 pm
PHX
- ORD
1 stop8h 54m
Frontier
Thu 6/49:10 am
ORD
- PHX
1 stop11h 25m
Frontier
Deal found 5/1![Frontier logo]()
$190
This Booking.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:05 am
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Sat 6/61:04 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/13:17 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Sat 6/131:04 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:53 pm
PHX
- STL
1 stop22h 30m
Frontier
Fri 6/127:03 pm
STL
- PHX
1 stop6h 01m
Frontier
Deal found 4/30![Frontier logo]()
$192
This Gotogate deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate 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 5/1![Allegiant Air logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/212:17 pm
PHX
- ORD
Nonstop3h 36m
Frontier
Tue 5/59:37 pm
ORD
- PHX
1 stop14h 28m
Frontier
Deal found 4/30![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/32:51 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Fri 6/129:10 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/139:15 am
PHX
- ORD
1 stop11h 46m
Frontier
Tue 6/169:48 pm
ORD
- PHX
1 stop17h 32m
Frontier
Deal found 4/29![Frontier logo]()
$196
This Mytrip deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/139:00 am
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Fri 5/158:35 pm
RFD
- AZA
Nonstop3h 34m
Allegiant Air
Deal found 5/1![Allegiant Air logo]()
$197
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 May 4, 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 May 4, 2026.
This Booking.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:05 am
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Sat 6/61:04 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$190
This United Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/22:45 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Wed 6/39:05 am
ORD
- PHX
Nonstop4h 01m
United Airlines
Deal found 5/1![United Airlines logo]()
$255
This Southwest deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:30 pm
PHX
- ORD
Nonstop3h 25m
Southwest
Tue 6/26:15 am
ORD
- PHX
1 stop8h 40m
Southwest
Deal found 5/3![Southwest logo]()
$265
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:55 am
PHX
- MDW
1 stop5h 54m
Delta
Wed 10/286:00 am
MDW
- PHX
1 stop8h 31m
Delta
Deal found 5/3![Delta logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1010:32 pm
PHX
- RFD
1 stop11h 51m
Multiple Airlines
Sun 6/141:13 pm
RFD
- PHX
1 stop24h 11m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$365
This Booking.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:05 am
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Mon 5/259:13 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$193
This Booking.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/292:51 pm
AZA
- RFD
Nonstop3h 08m
Allegiant Air
Mon 8/39:13 pm
RFD
- AZA
Nonstop3h 22m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$195
This Mytrip deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/272:59 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Wed 6/38:50 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$197
This Mytrip deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/139:00 am
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Fri 5/158:35 pm
RFD
- AZA
Nonstop3h 34m
Allegiant Air
Deal found 5/1![Allegiant Air logo]()
$197
This American Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/153:35 pm
PHX
- BMI
1 stop6h 17m
American Airlines
Mon 5/182:46 pm
BMI
- PHX
1 stop6h 40m
American Airlines
Deal found 5/2![American Airlines logo]()
$529
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/204:21 pm
PHX
- ORD
1 stop6h 23m
United Airlines
Tue 6/239:28 pm
ORD
- PHX
Nonstop3h 54m
United Airlines
Deal found 4/29![United Airlines logo]()
$265
This Southwest deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/193:50 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Sat 8/2910:10 am
MDW
- PHX
1 stop6h 40m
Southwest
Deal found 5/2![Southwest logo]()
$265
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/147:20 am
PHX
- MLI
2 stops14h 34m
Alaska Airlines
Fri 5/2211:07 am
MLI
- PHX
2 stops10h 03m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$534
This Delta deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:05 pm
PHX
- MDW
1 stop7h 40m
Delta
Sat 10/315:35 pm
MDW
- PHX
1 stop7h 39m
Delta
Deal found 5/1![Delta logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/223:17 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Wed 5/278:55 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$199
This United Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/92:45 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Tue 7/215:00 am
ORD
- PHX
1 stop6h 00m
United Airlines
Deal found 5/2![United Airlines logo]()
$265
This Southwest deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:30 pm
PHX
- ORD
Nonstop3h 25m
Southwest
Mon 6/17:20 pm
ORD
- PHX
Nonstop3h 55m
Southwest
Deal found 5/3![Southwest logo]()
$271
This Booking.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/123:11 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Mon 6/159:10 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$200
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/211:23 pm
PHX
- ORD
1 stop6h 27m
Delta
Tue 5/262:11 pm
ORD
- PHX
1 stop5h 54m
Delta
Deal found 4/29![Delta logo]()
$293
This Southwest deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:05 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Mon 6/11:50 pm
MDW
- PHX
Nonstop3h 45m
Southwest
Deal found 5/3![Southwest logo]()
$271
This United Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/112:45 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Wed 7/155:00 am
ORD
- PHX
1 stop6h 00m
United Airlines
Deal found 5/1![United Airlines logo]()
$285
This Booking.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/152:44 pm
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Mon 5/188:35 pm
RFD
- AZA
Nonstop3h 34m
Allegiant Air
Deal found 5/1![Allegiant Air logo]()
$206
This Delta deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/31:20 pm
PHX
- ORD
1 stop6h 37m
Delta
Fri 7/101:44 pm
ORD
- PHX
1 stop9h 50m
Delta
Deal found 4/30![Delta logo]()
$306
This Southwest deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1312:35 am
PHX
- MDW
Nonstop3h 15m
Southwest
Tue 8/1811:10 am
MDW
- PHX
Nonstop3h 35m
Southwest
Deal found 5/2![Southwest logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:05 am
PHX
- RFD
1 stop11h 34m
Multiple Airlines
Sun 9/279:29 pm
RFD
- PHX
1 stop15h 20m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$389
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/74:21 pm
PHX
- ORD
1 stop6h 23m
United Airlines
Mon 7/138:13 pm
ORD
- PHX
Nonstop3h 57m
United Airlines
Deal found 4/29![United Airlines logo]()
$296
This Southwest deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/811:55 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Wed 7/1511:45 am
MDW
- PHX
1 stop4h 50m
Southwest
Deal found 4/30![Southwest logo]()
$292
This Booking.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/182:44 pm
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Mon 5/259:13 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Deal found 4/29![Allegiant Air logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/310:27 pm
PHX
- RFD
1 stop11h 56m
Multiple Airlines
Thu 6/111:13 pm
RFD
- PHX
1 stop11h 47m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$395
This United Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/166:50 am
PHX
- ORD
Nonstop3h 38m
United Airlines
Thu 7/168:30 pm
ORD
- PHX
Nonstop3h 57m
United Airlines
Deal found 5/2![United Airlines logo]()
$317
Last-minute flights from Phoenix to IllinoisDiscover last-minute flight deals from Phoenix to Illinois. Data last updated May 4, 2026 and is based on user searches.
Discover last-minute flight deals from Phoenix to Illinois. Data last updated May 4, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/139:15 am
PHX
- ORD
1 stop11h 46m
Frontier
Tue 6/169:48 pm
ORD
- PHX
1 stop17h 32m
Frontier
Deal found 4/29![Frontier logo]()
$196
This Mytrip deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/139:00 am
AZA
- RFD
Nonstop3h 01m
Allegiant Air
Fri 5/158:35 pm
RFD
- AZA
Nonstop3h 34m
Allegiant Air
Deal found 5/1![Allegiant Air logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/223:17 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Wed 5/278:55 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$199
This Gotogate deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate 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 5/1![Allegiant Air logo]()
$193
This eDestinos deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:40 pm
PHX
- ORD
1 stop8h 54m
Frontier
Thu 6/49:10 am
ORD
- PHX
1 stop11h 25m
Frontier
Deal found 5/1![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/293:17 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Mon 6/19:13 pm
RFD
- AZA
Nonstop3h 35m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$200
This Booking.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:05 am
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Sat 6/61:04 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/3![Allegiant Air logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/13:17 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Sat 6/131:04 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/32:51 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Fri 6/129:10 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 5/4![Allegiant Air logo]()
$195
This Gotogate deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/53:11 pm
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Mon 6/89:10 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 4/30![Allegiant Air logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:53 pm
PHX
- STL
1 stop22h 30m
Frontier
Fri 6/127:03 pm
STL
- PHX
1 stop6h 01m
Frontier
Deal found 4/30![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/137:05 am
AZA
- RFD
Nonstop3h 09m
Allegiant Air
Wed 6/178:50 pm
RFD
- AZA
Nonstop3h 24m
Allegiant Air
Deal found 4/29![Allegiant Air logo]()
$188
One-way flights from Phoenix to IllinoisSearch for one-way flight options from Phoenix to Illinois. Find affordable one-way fares based on user searches. Data last updated May 4, 2026.
Search for one-way flight options from Phoenix to Illinois. Find affordable one-way fares based on user searches. Data last updated May 4, 2026.
This CheapOair deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:40 am
PHX
- STL
1 stop7h 54m
Frontier
Deal found 5/3![Frontier logo]()
$80
This Super.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2610:27 pm
PHX
- STL
1 stop17h 39m
Frontier
Deal found 5/2![Frontier logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:51 pm
PHX
- STL
1 stop22h 32m
Frontier
Deal found 5/3![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/276:24 am
PHX
- STL
1 stop10h 10m
Frontier
Deal found 5/1![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/111:26 am
PHX
- STL
2 stops29h 57m
Frontier
Deal found 5/4![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/256:24 am
PHX
- STL
1 stop9h 54m
Frontier
Deal found 4/30![Frontier logo]()
$95
This Super.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:40 am
PHX
- STL
1 stop8h 26m
Frontier
Deal found 5/3![Frontier logo]()
$99
This Super.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/211:30 pm
PHX
- MDW
1 stop9h 39m
Frontier
Deal found 5/4![Frontier logo]()
$103
This Super.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:40 pm
PHX
- ORD
1 stop8h 54m
Frontier
Deal found 4/29![Frontier logo]()
$104
This Super.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1911:35 pm
PHX
- MDW
1 stop9h 37m
Frontier
Deal found 5/1![Frontier logo]()
$104
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/223:17 pm
AZA
- RFD
Nonstop3h 06m
Allegiant Air
Deal found 4/29![Allegiant Air logo]()
$104
This Super.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:40 am
PHX
- STL
1 stop7h 54m
Frontier
Deal found 4/30![Frontier logo]()
$104
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 May 4, 2026.
Round-trip from | $180 (Kiwi.com) |
|---|---|
One-way from | $80 (CheapOair) |
Popular in | December |
Cheapest in | February |
Average price | $295 |
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 May 4, 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
Quickest round-trip
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Sat 5/30
7:05 am-12:11 pm
Nonstop3h 06m
Chicago Greater Rockford
Sat 6/6
1:04 pm-2:28 pm
Nonstop3h 24m
$190
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Sat 5/23
7:05 am-12:11 pm
Nonstop3h 06m
Chicago Greater Rockford
Mon 5/25
9:13 pm-10:48 pm
Nonstop3h 35m
$193
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Wed 7/29
2:51 pm-7:59 pm
Nonstop3h 08m
Chicago Greater Rockford
Mon 8/3
9:13 pm-10:35 pm
Nonstop3h 22m
$195
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Wed 5/27
2:59 pm-8:05 pm
Nonstop3h 06m
Chicago Greater Rockford
Wed 6/3
8:50 pm-10:14 pm
Nonstop3h 24m
$197
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Wed 5/13
9:00 am-2:01 pm
Nonstop3h 01m
Chicago Greater Rockford
Fri 5/15
8:35 pm-10:09 pm
Nonstop3h 34m
$197
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 5/22
3:17 pm-8:23 pm
Nonstop3h 06m
Chicago Greater Rockford
Wed 5/27
8:55 pm-10:30 pm
Nonstop3h 35m
$199
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 6/12
3:11 pm-8:20 pm
Nonstop3h 09m
Chicago Greater Rockford
Mon 6/15
9:10 pm-10:34 pm
Nonstop3h 24m
$200
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 5/15
2:44 pm-7:45 pm
Nonstop3h 01m
Chicago Greater Rockford
Mon 5/18
8:35 pm-10:09 pm
Nonstop3h 34m
$206
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Mon 5/18
2:44 pm-7:45 pm
Nonstop3h 01m
Chicago Greater Rockford
Mon 5/25
9:13 pm-10:48 pm
Nonstop3h 35m
$220
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Tue 6/2
2:45 pm-8:27 pm
Nonstop3h 42m
Chicago O'Hare Intl
Wed 6/3
9:05 am-11:06 am
Nonstop4h 01m
$255
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from 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-ORD
PHX-MDW
PHX-RFD
PHX-BMI
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-ORD
PHX-MDW
PHX-RFD
How far ahead should I book a flight from Phoenix to Illinois?
The price you pay for your flight from Phoenix to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 38 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Phoenix to Illinois?
Currently, September is the cheapest month in which you can book a flight from Phoenix to Illinois (average of $269). Flying from Phoenix to Illinois in January is currently the most expensive (average of $657). 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 May 4, 2026.
A simple way to save on the total cost of your ticket is to fly from Phoenix to Illinois in the afternoon. If you’re flexible enough to do this you can expect to save up to 20% 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 May 2, 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 May 4, 2026.
The most flights from PH1 to USIL are scheduled on a Monday (59 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (30 on average).
How much does it cost to fly round-trip from Phoenix to Illinois?
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated May 4, 2026.
See what other customers who have flown with Southwest,United Airlines, andAllegiant Air from 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.
Food
7.0
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
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.
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 Phoenix 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 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 May 4, 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 7 airlines flying from Phoenix to Illinois
Discover the top 7 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 May 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$64 | Average$199 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$93 | Average$211 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$158 | Average$206 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$187 | Average$327 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$187 | Average$388 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$197 | Average$421 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$210 | Average$328 | FlexibilityNo cancel fee | On-time75% |