$48+ Cheap flights from Illinois to Arizona
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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PHX
Jul 18 — Jul 251
Round-trip
1 adult, Economy
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Cheapest flights from Illinois to ArizonaExplore the most affordable flight options available from Illinois to Arizona. 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 Illinois to Arizona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 18, 2026.
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.
Sun 8/231:06 pm
MLI
- LAS
Nonstop3h 25m
Allegiant Air
Thu 8/277:05 am
LAS
- MLI
Nonstop3h 11m
Allegiant Air
Deal found 6/17![Allegiant Air logo]()
$117
This Cheapflightsfares deal was found by Cheapflights users on 6/18. 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.
Sun 8/1612:31 pm
MLI
- LAS
Nonstop3h 32m
Allegiant Air
Sun 8/237:05 am
LAS
- MLI
Nonstop3h 11m
Allegiant Air
Deal found 6/18![Allegiant Air logo]()
$159
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.
Tue 7/147:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Wed 7/1512:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$166
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Mon 7/2712:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$172
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:08 pm
STL
- LAS
1 stop5h 21m
Frontier
Mon 8/1712:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$174
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Mon 7/2712:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$175
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.
Sun 7/57:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Wed 7/812:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/16![Frontier logo]()
$176
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.
Sun 10/182:00 pm
MLI
- LAS
Nonstop3h 32m
Allegiant Air
Thu 10/226:35 am
LAS
- MLI
Nonstop3h 10m
Allegiant Air
Deal found 6/17![Allegiant Air logo]()
$177
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 8/37:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Wed 8/59:42 pm
LAS
- STL
1 stop24h 17m
Frontier
Deal found 6/17![Frontier logo]()
$178
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 7/288:08 pm
STL
- LAS
1 stop19h 39m
Frontier
Thu 7/3012:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$179
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/307:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Mon 8/312:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$180
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/107:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Thu 8/1312:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/16![Frontier logo]()
$181
Best flights from Illinois to ArizonaDiscover carefully curated flight deals from Illinois to Arizona 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 Illinois to Arizona 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 6/13. 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 8/118:25 am
STL
- LAS
1 stop6h 05m
Southwest
Thu 8/1311:25 am
LAS
- STL
2 stops6h 45m
Southwest
Deal found 6/13![Southwest logo]()
$204
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/155:10 am
STL
- LAS
1 stop5h 57m
United Airlines
Wed 7/224:25 pm
LAS
- STL
1 stop5h 32m
United Airlines
Deal found 6/14![United Airlines logo]()
$217
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.
Fri 7/177:55 pm
STL
- LAS
1 stop5h 45m
Delta
Mon 7/275:00 pm
LAS
- STL
1 stop5h 41m
Delta
Deal found 6/17![Delta logo]()
$217
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/139:13 pm
RFD
- AZA
Nonstop3h 22m
Allegiant Air
Fri 7/173:15 pm
AZA
- RFD
Nonstop3h 08m
Allegiant Air
Deal found 6/15![Allegiant Air logo]()
$241
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.
Sun 8/303:59 pm
RFD
- LAS
1 stop9h 28m
Multiple Airlines
Thu 9/33:15 pm
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$248
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.
Wed 9/167:20 am
ORD
- PHX
1 stop9h 13m
Alaska Airlines
Wed 9/237:49 pm
PHX
- ORD
1 stop15h 33m
Alaska Airlines
Deal found 6/14![Alaska Airlines logo]()
$255
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/43:50 pm
STL
- LAS
1 stop6h 26m
Delta
Thu 8/65:02 pm
LAS
- STL
1 stop5h 39m
Delta
Deal found 6/14![Delta logo]()
$217
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/39:29 pm
RFD
- LAS
Nonstop3h 39m
Allegiant Air
Sun 9/63:15 pm
LAS
- RFD
Nonstop3h 24m
Allegiant Air
Deal found 6/16![Allegiant Air logo]()
$243
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.
Wed 9/25:30 am
ORD
- PHX
1 stop6h 52m
United Airlines
Tue 9/84:26 pm
PHX
- ORD
Nonstop3h 39m
United Airlines
Deal found 6/16![United Airlines logo]()
$255
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 8/47:59 pm
ORD
- PHX
1 stop18h 24m
Alaska Airlines
Tue 8/111:05 pm
PHX
- ORD
1 stop8h 31m
Alaska Airlines
Deal found 6/13![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 8/43:05 pm
MDW
- PHX
1 stop5h 50m
Southwest
Wed 8/512:35 am
PHX
- MDW
Nonstop3h 15m
Southwest
Deal found 6/16![Southwest logo]()
$267
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.
Sun 7/269:19 am
RFD
- LAS
1 stop10h 21m
Multiple Airlines
Thu 7/307:00 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Deal found 6/13![Multiple Airlines logo]()
$272
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.
Tue 9/15:09 pm
MLI
- LAS
1 stop8h 01m
Delta
Wed 9/97:05 am
LAS
- MLI
1 stop7h 17m
Delta
Deal found 6/17![Delta logo]()
$261
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/131:24 pm
RFD
- LAS
Nonstop3h 41m
Allegiant Air
Sun 8/167:10 am
LAS
- RFD
Nonstop3h 24m
Allegiant Air
Deal found 6/17![Allegiant Air logo]()
$265
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.
Thu 8/138:00 am
MDW
- PHX
1 stop5h 50m
Southwest
Mon 8/171:30 pm
PHX
- MDW
Nonstop3h 15m
Southwest
Deal found 6/16![Southwest logo]()
$275
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/19:02 am
ORD
- PHX
Nonstop4h 01m
United Airlines
Sat 7/41:28 pm
PHX
- ORD
Nonstop3h 42m
United Airlines
Deal found 6/13![United Airlines logo]()
$275
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.
Thu 8/69:21 am
RFD
- LAS
1 stop10h 19m
Multiple Airlines
Thu 8/137:10 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Deal found 6/14![Multiple Airlines logo]()
$282
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/37:59 pm
ORD
- LAS
1 stop16h 32m
Alaska Airlines
Wed 7/82:38 pm
LAS
- ORD
1 stop6h 58m
Alaska Airlines
Deal found 6/17![Alaska Airlines logo]()
$283
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.
Tue 8/41:59 pm
ORD
- PHX
1 stop9h 33m
Delta
Tue 8/1111:45 am
PHX
- ORD
1 stop6h 45m
Delta
Deal found 6/15![Delta logo]()
$265
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 7/149:10 pm
MDW
- LAS
Nonstop4h 00m
Southwest
Tue 7/2111:55 pm
LAS
- MDW
Nonstop3h 30m
Southwest
Deal found 6/16![Southwest logo]()
$275
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 7/46:20 am
ORD
- LAS
1 stop13h 12m
Alaska Airlines
Tue 7/76:19 pm
LAS
- ORD
1 stop17h 02m
Alaska Airlines
Deal found 6/14![Alaska Airlines logo]()
$283
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 7/18:49 pm
RFD
- AZA
Nonstop3h 22m
Allegiant Air
Wed 7/82:51 pm
AZA
- RFD
Nonstop3h 08m
Allegiant Air
Deal found 6/14![Allegiant Air logo]()
$291
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.
Fri 8/149:12 am
ORD
- PHX
Nonstop3h 56m
United Airlines
Mon 8/172:26 pm
PHX
- ORD
Nonstop3h 39m
United Airlines
Deal found 6/16![United Airlines logo]()
$293
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:05 am
MDW
- PHX
1 stop8h 03m
Delta
Tue 8/411:56 pm
PHX
- MDW
1 stop8h 03m
Delta
Deal found 6/16![Delta logo]()
$275
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.
Thu 8/68:00 am
MDW
- PHX
1 stop5h 50m
Southwest
Mon 8/104:00 pm
PHX
- MDW
1 stop5h 45m
Southwest
Deal found 6/15![Southwest logo]()
$280
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:20 am
ORD
- LAS
1 stop9h 38m
Alaska Airlines
Wed 8/57:59 am
LAS
- ORD
1 stop8h 58m
Alaska Airlines
Deal found 6/17![Alaska Airlines logo]()
$285
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 8/273:59 pm
RFD
- LAS
1 stop9h 28m
Multiple Airlines
Sun 8/303:18 pm
LAS
- RFD
Nonstop3h 27m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$318
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/18:49 pm
RFD
- AZA
Nonstop3h 22m
Allegiant Air
Mon 7/63:15 pm
AZA
- RFD
Nonstop3h 08m
Allegiant Air
Deal found 6/16![Allegiant Air logo]()
$293
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.
Sat 7/184:02 pm
ORD
- PHX
Nonstop3h 53m
United Airlines
Sun 7/266:50 am
PHX
- ORD
Nonstop3h 38m
United Airlines
Deal found 6/17![United Airlines logo]()
$296
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.
Tue 8/46:05 am
MDW
- PHX
1 stop8h 03m
Delta
Thu 8/1311:05 pm
PHX
- MDW
1 stop8h 12m
Delta
Deal found 6/17![Delta logo]()
$277
Last-minute flights from Illinois to ArizonaDiscover last-minute flight deals from Illinois to Arizona. Data last updated June 18, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Arizona. Data last updated June 18, 2026 and is based on user searches.
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.
Sun 7/57:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Wed 7/812:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/16![Frontier logo]()
$176
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/512:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Thu 7/166:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Deal found 6/16![Allegiant Air logo]()
$183
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 7/78:08 pm
STL
- LAS
1 stop16h 59m
Frontier
Thu 7/1612:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$183
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 7/78:08 pm
STL
- LAS
1 stop16h 59m
Frontier
Wed 7/1512:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$184
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/117:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Tue 7/1412:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$174
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/117:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Fri 7/1712:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$182
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.
Tue 7/147:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Wed 7/1512:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$166
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Mon 7/2712:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$175
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Mon 7/2712:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$172
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 7/288:08 pm
STL
- LAS
1 stop19h 39m
Frontier
Thu 7/3012:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$179
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 7/288:08 pm
STL
- LAS
1 stop19h 39m
Frontier
Fri 7/3112:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$186
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/307:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Mon 8/312:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/17![Frontier logo]()
$180
One-way flights from Illinois to ArizonaSearch for one-way flight options from Illinois to Arizona. Find affordable one-way fares based on user searches. Data last updated June 18, 2026.
Search for one-way flight options from Illinois to Arizona. 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 6/16. 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 8/208:21 pm
STL
- LAS
Nonstop3h 38m
Frontier
Deal found 6/16![Frontier logo]()
$48
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/157:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/17![Frontier logo]()
$49
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/287:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/17![Frontier logo]()
$54
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/16![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.
Mon 7/67:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/16![Frontier logo]()
$56
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/147:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/16![Frontier logo]()
$57
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 7/247:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/16![Frontier logo]()
$62
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.
Mon 7/277:10 pm
STL
- PHX
1 stop19h 49m
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.
Mon 8/177:10 pm
STL
- PHX
1 stop19h 49m
Frontier
Deal found 6/17![Frontier logo]()
$81
This WAYA 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/157:03 pm
STL
- PHX
1 stop6h 02m
Frontier
Deal found 6/17![Frontier logo]()
$82
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 7/147:03 pm
STL
- PHX
1 stop19h 56m
Frontier
Deal found 6/17![Frontier logo]()
$84
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 7/137:10 pm
STL
- PHX
1 stop19h 49m
Frontier
Deal found 6/16![Frontier logo]()
$86
Find flight deals from Illinois to Arizona
Keep the following information in mind while searching for Illinois to Arizona flight deals. Data was last updated June 18, 2026.
Round-trip from | $117 (Cheapflightsfares) |
|---|---|
One-way from | $48 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $342 |
Good round-trip deal | $159 or less |
Good one-way deal | $89 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Arizona 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 Illinois to Arizona that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Tue 8/11
8:25 am-12:30 pm
1 stop6h 05m
Las Vegas Harry Reid Intl
Thu 8/13
11:25 am-8:10 pm
2 stops6h 45m
$204
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Wed 7/15
5:10 am-9:07 am
1 stop5h 57m
Las Vegas Harry Reid Intl
Wed 7/22
4:25 pm-11:57 pm
1 stop5h 32m
$217
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Fri 7/17
7:55 pm-11:40 pm
1 stop5h 45m
Las Vegas Harry Reid Intl
Mon 7/27
5:00 pm-12:41 am
1 stop5h 41m
$217
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Tue 8/4
3:50 pm-8:16 pm
1 stop6h 26m
Las Vegas Harry Reid Intl
Thu 8/6
5:02 pm-12:41 am
1 stop5h 39m
$217
Quickest round-trip
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Mon 7/13
9:13 pm-10:35 pm
Nonstop3h 22m
Phoenix-Mesa Gateway
Fri 7/17
3:15 pm-8:23 pm
Nonstop3h 08m
$241
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Thu 9/3
9:29 pm-11:08 pm
Nonstop3h 39m
Las Vegas Harry Reid Intl
Sun 9/6
3:15 pm-8:39 pm
Nonstop3h 24m
$243
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Sun 8/30
3:59 pm-11:27 pm
1 stop9h 28m
Las Vegas Harry Reid Intl
Thu 9/3
3:15 pm-8:39 pm
Nonstop3h 24m
$248
ChicagoPhoenix
ORD - PHX
ORDPHX
Chicago O'Hare Intl
Wed 9/16
7:20 am-2:33 pm
1 stop9h 13m
Phoenix Sky Harbor Intl
Wed 9/23
7:49 pm-1:22 pm
1 stop15h 33m
$255
ChicagoPhoenix
ORD - PHX
ORDPHX
Chicago O'Hare Intl
Wed 9/2
5:30 am-10:22 am
1 stop6h 52m
Phoenix Sky Harbor Intl
Tue 9/8
4:26 pm-10:05 pm
Nonstop3h 39m
$255
ChicagoPhoenix
ORD - PHX
ORDPHX
Chicago O'Hare Intl
Tue 8/4
7:59 pm-12:23 pm
1 stop18h 24m
Phoenix Sky Harbor Intl
Tue 8/11
1:05 pm-11:36 pm
1 stop8h 31m
$255
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to Arizona
Have a flexible travel schedule? Discover the best time to fly to Arizona from Illinois with our price prediction graph.
STL-LAS
MLI-LAS
ORD-PHX
RFD-LAS
STL-PHX
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 Illinois to Arizona
USIL-USAZ
STL-LAS
MLI-LAS
ORD-PHX
RFD-LAS
What is the cheapest month to book a flight from Illinois to Arizona?
Currently, January is the cheapest month in which you can book a flight from Illinois to Arizona (average of $225). Flying from Illinois to Arizona in December is currently the most expensive (average of $360). 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 IL to AZ?
Find hourly flight availability from Illinois to Arizona. 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.
One of the essential ways to save on airfare from Illinois to Arizona is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 13% on airfare.
Weekly flight availability from Illinois to Arizona
Explore weekly flight availability from Illinois to Arizona. 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 USIL to USAZ are scheduled on a Thursday (53 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (39 on average).
How much does it cost to fly round-trip from Illinois to Arizona?
How far ahead should I book a flight from Illinois to Arizona?
Booking 80 days in advance of your planned departure date is, on average, the best time to get cheap flights from Illinois to Arizona. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest day to fly from Illinois to Arizona?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Arizona. Price data was last updated on June 13, 2026.
Travelers seeking maximum savings on their Illinois to Arizona flight should consider departing on Friday afternoons when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Arizona
Get insights into the airlines that provide service to Arizona. 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 Arizona. Reviews last updated June 18, 2026.
Read through reviews of airlines operating flights from Illinois to Arizona, such as Southwest,United Airlines, andAllegiant Air. 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
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Boarding
8.1
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Boarding
8.1
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Boarding
8.1
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Boarding
8.1
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Boarding
8.1
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
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 Illinois to Arizona. 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 Illinois to Arizona
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Arizona by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Arizona by cabin class
Find flights from Illinois to Arizona, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Arizona flights
Browse other Illinois and Arizona 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 Arizona
Find the right flight back to Illinois after your stay in Arizona
Illinois to Arizona flights
Consider these flights traveling from Illinois to Arizona.
Top 8 airlines flying from Illinois to Arizona
Discover the top 8 airlines that operate flights from Illinois to Arizona. 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$65 | Average$223 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$108 | Average$296 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$118 | Average$223 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$184 | Average$416 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$188 | Average$328 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$196 | Average$468 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$204 | Average$384 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$220 | Average$269 | FlexibilityNo cancel fee | On-time75% |