$63+ Cheap flights from Austin (AUS) 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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ORD
May 30 — Jun 61
Round-trip
1 adult, Economy
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Cheapest flights from Austin to IllinoisExplore the most affordable flight options available from Austin to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2026.
Explore the most affordable flight options available from Austin to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/269:13 pm
AUS
- STL
1 stop22h 10m
Frontier
Tue 6/26:33 pm
STL
- AUS
1 stop18h 31m
Frontier
Deal found 4/28![Frontier logo]()
$139
This CheapOair deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” 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 5/239:13 pm
AUS
- STL
1 stop22h 10m
Frontier
Tue 5/266:51 pm
STL
- AUS
1 stop26h 56m
Frontier
Deal found 4/25![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:47 pm
AUS
- STL
1 stop15h 08m
Frontier
Tue 6/98:08 pm
STL
- AUS
1 stop27h 51m
Frontier
Deal found 4/27![Frontier logo]()
$162
This CheapOair deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” 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 5/239:13 pm
AUS
- STL
1 stop22h 10m
Frontier
Sat 5/308:08 pm
STL
- AUS
1 stop13h 35m
Frontier
Deal found 4/25![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/93:27 pm
AUS
- STL
1 stop17h 20m
Frontier
Tue 6/168:08 pm
STL
- AUS
1 stop27h 51m
Frontier
Deal found 4/28![Frontier logo]()
$179
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 5/2710:28 am
AUS
- STL
1 stop8h 55m
Frontier
Wed 6/34:19 pm
STL
- AUS
1 stop24h 45m
Frontier
Deal found 4/29![Frontier logo]()
$185
This CheapOair deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2910:28 am
AUS
- STL
1 stop8h 55m
Frontier
Sat 5/308:08 pm
STL
- AUS
1 stop13h 35m
Frontier
Deal found 4/28![Frontier logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2710:28 am
AUS
- STL
1 stop8h 55m
Frontier
Sun 5/314:19 pm
STL
- AUS
1 stop18h 31m
Frontier
Deal found 4/28![Frontier logo]()
$193
This Expedia deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3012:44 pm
AUS
- MDW
1 stop9h 18m
Frontier
Tue 6/26:00 am
MDW
- AUS
1 stop10h 52m
Frontier
Deal found 4/26![Frontier logo]()
$201
This Expedia deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3012:44 pm
AUS
- ORD
1 stop6h 57m
Frontier
Thu 6/46:55 am
ORD
- AUS
1 stop9h 57m
Frontier
Deal found 4/25![Frontier logo]()
$201
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/269:58 am
AUS
- STL
1 stop9h 25m
Frontier
Tue 9/18:08 pm
STL
- AUS
1 stop13h 05m
Frontier
Deal found 4/29![Frontier logo]()
$201
This Frontier deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2810:28 am
AUS
- STL
1 stop8h 55m
Frontier
Mon 6/18:08 pm
STL
- AUS
1 stop24h 10m
Frontier
Deal found 4/28![Frontier logo]()
$202
Best flights from Austin to IllinoisDiscover carefully curated flight deals from Austin to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 30, 2026.
Discover carefully curated flight deals from Austin to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 30, 2026.
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:00 pm
AUS
- MLI
1 stop5h 21m
Delta
Wed 6/35:56 am
MLI
- AUS
1 stop7h 47m
Delta
Deal found 4/26![Delta logo]()
$231
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1611:30 am
AUS
- STL
1 stop12h 51m
Frontier
Sun 5/1712:36 pm
STL
- AUS
1 stop9h 11m
Frontier
Deal found 4/29![Frontier logo]()
$235
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/108:50 pm
AUS
- MDW
Nonstop2h 30m
Southwest
Sat 6/138:25 pm
MDW
- AUS
Nonstop2h 35m
Southwest
Deal found 4/29![Southwest logo]()
$241
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.
Wed 6/37:44 pm
AUS
- ORD
1 stop5h 01m
United Airlines
Sat 6/67:50 pm
ORD
- AUS
Nonstop2h 56m
United Airlines
Deal found 4/29![United Airlines logo]()
$251
This American Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/206:33 pm
AUS
- PIA
1 stop6h 05m
American Airlines
Tue 6/234:20 pm
PIA
- AUS
1 stop6h 25m
American Airlines
Deal found 4/27![American Airlines logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/58:29 am
AUS
- RFD
1 stop23h 48m
Multiple Airlines
Thu 6/181:13 pm
RFD
- AUS
1 stop22h 04m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$452
This Delta deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:00 pm
AUS
- MLI
1 stop5h 21m
Delta
Wed 6/311:00 am
MLI
- AUS
1 stop6h 33m
Delta
Deal found 4/27![Delta logo]()
$231
This Southwest deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/233:55 pm
AUS
- STL
Nonstop2h 10m
Southwest
Sat 5/308:50 am
STL
- AUS
Nonstop2h 10m
Southwest
Deal found 4/25![Southwest logo]()
$241
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/76:40 am
AUS
- ORD
Nonstop2h 59m
United Airlines
Fri 7/101:14 pm
ORD
- AUS
Nonstop2h 53m
United Airlines
Deal found 4/26![United Airlines logo]()
$256
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/117:32 pm
AUS
- RFD
1 stop23h 31m
Allegiant Air
Thu 6/189:19 am
RFD
- AUS
2 stops24h 45m
Allegiant Air
Deal found 4/26![Allegiant Air logo]()
$512
This Southwest deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” 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 6/32:00 pm
AUS
- MDW
Nonstop2h 35m
Southwest
Tue 6/910:00 am
MDW
- AUS
Nonstop2h 35m
Southwest
Deal found 4/25![Southwest logo]()
$250
This Delta deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/202:43 pm
AUS
- MDW
1 stop7h 34m
Delta
Wed 6/2412:45 pm
MDW
- AUS
1 stop7h 42m
Delta
Deal found 4/27![Delta logo]()
$261
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.
Wed 5/276:40 am
AUS
- ORD
Nonstop2h 59m
United Airlines
Sun 5/317:00 am
ORD
- AUS
Nonstop2h 56m
United Airlines
Deal found 4/29![United Airlines logo]()
$265
This American Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:39 pm
AUS
- PIA
1 stop6h 18m
American Airlines
Sat 7/46:00 am
PIA
- AUS
1 stop4h 43m
American Airlines
Deal found 4/26![American Airlines logo]()
$303
This Southwest deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” 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 5/277:20 am
AUS
- MDW
Nonstop2h 25m
Southwest
Sat 7/188:25 pm
MDW
- AUS
Nonstop2h 35m
Southwest
Deal found 4/25![Southwest logo]()
$256
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/306:10 am
AUS
- MDW
1 stop6h 59m
Delta
Wed 7/86:00 am
MDW
- AUS
1 stop6h 25m
Delta
Deal found 4/26![Delta logo]()
$261
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.
Wed 7/227:44 pm
AUS
- ORD
1 stop5h 01m
United Airlines
Sun 7/266:45 am
ORD
- AUS
Nonstop2h 45m
United Airlines
Deal found 4/29![United Airlines logo]()
$266
This American Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:22 pm
AUS
- PIA
1 stop5h 37m
American Airlines
Tue 6/24:46 pm
PIA
- AUS
1 stop7h 13m
American Airlines
Deal found 4/27![American Airlines logo]()
$315
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.
Sat 6/2010:35 am
AUS
- ORD
1 stop6h 21m
Delta
Sat 6/277:01 am
ORD
- AUS
1 stop7h 57m
Delta
Deal found 4/29![Delta logo]()
$261
This Southwest deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:20 am
AUS
- MDW
Nonstop2h 25m
Southwest
Sun 5/318:00 am
MDW
- AUS
Nonstop2h 45m
Southwest
Deal found 4/28![Southwest logo]()
$265
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/57:44 pm
AUS
- ORD
1 stop5h 01m
United Airlines
Tue 6/96:45 am
ORD
- AUS
Nonstop2h 45m
United Airlines
Deal found 4/26![United Airlines logo]()
$266
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1011:00 am
AUS
- STL
Nonstop2h 05m
Southwest
Sun 6/1410:25 pm
STL
- AUS
Nonstop2h 00m
Southwest
Deal found 4/27![Southwest logo]()
$265
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.
Wed 7/157:44 pm
AUS
- ORD
1 stop5h 01m
United Airlines
Sun 7/196:45 am
ORD
- AUS
Nonstop2h 45m
United Airlines
Deal found 4/29![United Airlines logo]()
$266
This American Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/247:45 am
AUS
- SPI
1 stop6h 16m
American Airlines
Sun 5/316:00 am
SPI
- AUS
1 stop4h 59m
American Airlines
Deal found 4/28![American Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:38 pm
AUS
- ORD
1 stop5h 21m
Delta
Tue 6/95:30 am
ORD
- AUS
1 stop5h 34m
Delta
Deal found 4/28![Delta logo]()
$276
This Southwest deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” 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 6/35:00 pm
AUS
- MDW
Nonstop2h 35m
Southwest
Sat 6/63:25 pm
MDW
- AUS
1 stop5h 50m
Southwest
Deal found 4/25![Southwest logo]()
$266
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/205:09 pm
AUS
- CMI
1 stop5h 11m
United Airlines
Wed 6/246:30 am
CMI
- AUS
1 stop5h 26m
United Airlines
Deal found 4/26![United Airlines logo]()
$270
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:15 am
AUS
- ORD
1 stop7h 46m
Delta
Mon 6/87:01 am
ORD
- AUS
1 stop7h 57m
Delta
Deal found 4/26![Delta logo]()
$276
This American Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” 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.
Sat 7/115:00 am
AUS
- BMI
2 stops6h 29m
American Airlines
Wed 7/155:54 pm
BMI
- AUS
1 stop6h 00m
American Airlines
Deal found 4/25![American Airlines logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:45 pm
AUS
- RFD
1 stop23h 15m
Multiple Airlines
Sun 7/269:19 am
RFD
- AUS
2 stops14h 48m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$455
Last-minute flights from Austin to IllinoisDiscover last-minute flight deals from Austin to Illinois. Data last updated April 30, 2026 and is based on user searches.
Discover last-minute flight deals from Austin to Illinois. Data last updated April 30, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” 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 5/119:13 pm
AUS
- ORD
1 stop23h 19m
Frontier
Mon 5/184:05 pm
ORD
- AUS
2 stops24h 47m
Frontier
Deal found 4/25![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/195:47 pm
AUS
- ORD
1 stop14h 08m
Frontier
Sun 5/246:55 am
ORD
- AUS
1 stop9h 57m
Frontier
Deal found 4/26![Frontier logo]()
$205
This Frontier deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/202:03 pm
AUS
- MDW
1 stop7h 59m
Frontier
Sat 5/236:00 am
MDW
- AUS
1 stop5h 49m
Frontier
Deal found 4/27![Frontier logo]()
$205
This CheapOair deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” 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 5/239:13 pm
AUS
- STL
1 stop22h 10m
Frontier
Tue 5/266:51 pm
STL
- AUS
1 stop26h 56m
Frontier
Deal found 4/25![Frontier logo]()
$151
This CheapOair deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” 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 5/239:13 pm
AUS
- STL
1 stop22h 10m
Frontier
Sat 5/308:08 pm
STL
- AUS
1 stop13h 35m
Frontier
Deal found 4/25![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/269:13 pm
AUS
- STL
1 stop22h 10m
Frontier
Tue 6/26:33 pm
STL
- AUS
1 stop18h 31m
Frontier
Deal found 4/28![Frontier logo]()
$139
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 5/2710:28 am
AUS
- STL
1 stop8h 55m
Frontier
Wed 6/34:19 pm
STL
- AUS
1 stop24h 45m
Frontier
Deal found 4/29![Frontier logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2710:28 am
AUS
- STL
1 stop8h 55m
Frontier
Sun 5/314:19 pm
STL
- AUS
1 stop18h 31m
Frontier
Deal found 4/28![Frontier logo]()
$193
This Frontier deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2810:28 am
AUS
- STL
1 stop8h 55m
Frontier
Mon 6/18:08 pm
STL
- AUS
1 stop24h 10m
Frontier
Deal found 4/28![Frontier logo]()
$202
This CheapOair deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/299:13 pm
AUS
- STL
1 stop22h 10m
Frontier
Sun 5/314:19 pm
STL
- AUS
1 stop18h 31m
Frontier
Deal found 4/28![Frontier logo]()
$191
This Expedia deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3012:44 pm
AUS
- MDW
1 stop9h 18m
Frontier
Tue 6/26:00 am
MDW
- AUS
1 stop10h 52m
Frontier
Deal found 4/26![Frontier logo]()
$201
This Expedia deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3012:44 pm
AUS
- ORD
1 stop6h 57m
Frontier
Thu 6/46:55 am
ORD
- AUS
1 stop9h 57m
Frontier
Deal found 4/25![Frontier logo]()
$201
One-way flights from Austin to IllinoisSearch for one-way flight options from Austin to Illinois. Find affordable one-way fares based on user searches. Data last updated April 30, 2026.
Search for one-way flight options from Austin to Illinois. Find affordable one-way fares based on user searches. Data last updated April 30, 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.
Wed 6/106:30 am
AUS
- STL
1 stop12h 53m
Frontier
Deal found 4/29![Frontier logo]()
$63
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 5/2710:28 am
AUS
- STL
1 stop8h 55m
Frontier
Deal found 4/29![Frontier logo]()
$65
This Super.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1611:30 am
AUS
- STL
1 stop12h 51m
Frontier
Deal found 4/26![Frontier logo]()
$75
This Expedia deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/239:13 pm
AUS
- STL
1 stop22h 10m
Frontier
Deal found 4/26![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/245:47 pm
AUS
- STL
1 stop15h 08m
Frontier
Deal found 4/27![Frontier logo]()
$77
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 5/265:47 pm
AUS
- STL
1 stop15h 08m
Frontier
Deal found 4/29![Frontier logo]()
$81
This Super.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” 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 5/99:13 pm
AUS
- STL
1 stop22h 10m
Frontier
Deal found 4/24![Frontier logo]()
$95
This Expedia deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:00 pm
AUS
- STL
1 stop16h 29m
Frontier
Deal found 4/27![Frontier logo]()
$98
This Super.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/2410:37 am
AUS
- STL
1 stop13h 32m
Frontier
Deal found 4/27![Frontier logo]()
$99
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1710:42 pm
AUS
- STL
1 stop21h 41m
Frontier
Deal found 4/29![Frontier logo]()
$102
This Trip.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” 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 5/132:03 pm
AUS
- MDW
1 stop7h 59m
Frontier
Deal found 4/25![Frontier logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” 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 5/195:47 pm
AUS
- ORD
2 stops29h 26m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$113
Find flight deals from Austin to Illinois
Keep the following information in mind while searching for Austin to Illinois flight deals. Data was last updated April 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $139 (Kiwi.com) |
One-way from | $63 (Kiwi.com) |
Popular in | March |
Cheapest in | January |
Average price | $312 |
Good round-trip deal | $333 or less |
Good one-way deal | $217 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Austin 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 April 30, 2026.
Use the filters below to find and compare flights from Austin to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
AustinMoline
AUS - MLI
AUSMLI
Austin Bergstrom
Fri 5/29
5:00 pm-10:21 pm
1 stop5h 21m
Moline Quad-City
Wed 6/3
5:56 am-1:43 pm
1 stop7h 47m
$231
AustinMoline
AUS - MLI
AUSMLI
Austin Bergstrom
Thu 5/28
5:00 pm-10:21 pm
1 stop5h 21m
Moline Quad-City
Wed 6/3
11:00 am-5:33 pm
1 stop6h 33m
$231
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Sat 5/16
11:30 am-12:21 am
1 stop12h 51m
Lambert-St Louis
Sun 5/17
12:36 pm-9:47 pm
1 stop9h 11m
$235
AustinChicago
AUS - MDW
AUSMDW
Austin Bergstrom
Wed 6/10
8:50 pm-11:20 pm
Nonstop2h 30m
Chicago Midway
Sat 6/13
8:25 pm-11:00 pm
Nonstop2h 35m
$241
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Sat 5/23
3:55 pm-6:05 pm
Nonstop2h 10m
Lambert-St Louis
Sat 5/30
8:50 am-11:00 am
Nonstop2h 10m
$241
AustinChicago
AUS - MDW
AUSMDW
Austin Bergstrom
Wed 6/3
2:00 pm-4:35 pm
Nonstop2h 35m
Chicago Midway
Tue 6/9
10:00 am-12:35 pm
Nonstop2h 35m
$250
AustinChicago
AUS - ORD
AUSORD
Austin Bergstrom
Wed 6/3
7:44 pm-12:45 am
1 stop5h 01m
Chicago O'Hare Intl
Sat 6/6
7:50 pm-10:46 pm
Nonstop2h 56m
$251
AustinChicago
AUS - ORD
AUSORD
Austin Bergstrom
Tue 7/7
6:40 am-9:39 am
Nonstop2h 59m
Chicago O'Hare Intl
Fri 7/10
1:14 pm-4:07 pm
Nonstop2h 53m
$256
AustinChicago
AUS - MDW
AUSMDW
Austin Bergstrom
Wed 5/27
7:20 am-9:45 am
Nonstop2h 25m
Chicago Midway
Sat 7/18
8:25 pm-11:00 pm
Nonstop2h 35m
$256
AustinChicago
AUS - MDW
AUSMDW
Austin Bergstrom
Sat 6/20
2:43 pm-10:17 pm
1 stop7h 34m
Chicago Midway
Wed 6/24
12:45 pm-8:27 pm
1 stop7h 42m
$261
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Austin to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Austin with our price prediction graph.
AUS-STL
AUS-MDW
AUS-ORD
AUS-MLI
AUS-PIA
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 Austin to Illinois
AUS-USIL
AUS-STL
AUS-MDW
AUS-ORD
AUS-MLI
How far ahead should I book a flight from Austin to Illinois?
To ensure you get the cheapest price possible for a flight from Austin to Illinois, you should look to book at least 29 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Austin to Illinois?
Currently, October is the cheapest month in which you can book a flight from Austin to Illinois (average of $46). Flying from Austin to Illinois in March is currently the most expensive (average of $1,104). 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 AUS to IL?
Find hourly flight availability from Austin 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 April 30, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 42% on flights from Austin to Illinois by exploring options for tickets in the evening.
What is the cheapest day to fly from Austin to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Austin to Illinois. Price data was last updated on April 25, 2026.
Travelers seeking maximum savings on their Austin to Illinois flight should consider departing on Tuesday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Austin to Illinois
Explore weekly flight availability from Austin 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 April 30, 2026.
The most flights from AUS to USIL are scheduled on a Wednesday (38 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (18 on average).
How much does it cost to fly round-trip from Austin 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 April 30, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited Airlines from Austin to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Related info for your journey
Find useful and relevant information for your journey from Austin 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 Austin 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 Austin to Illinois by cabin class
Find flights from Austin to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Austin and Illinois flights
Browse other Austin and Illinois flight options. Last updated on April 30, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Austin to Illinois flights
Consider these flights traveling from Austin to Illinois.
Top 4 airlines flying from Austin to Illinois
Discover the top 4 airlines that operate flights from Austin 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 April 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$68 | Average$225 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$143 | Average$330 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$161 | Average$406 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$181 | Average$398 | FlexibilityNo cancel fee | On-time69% |