$82+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ORD
Apr 15 — Apr 221
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 March 16, 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 March 16, 2026.
This eDestinos deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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.
Fri 4/1010:06 pm
AUS
- ORD
Nonstop2h 52m
Frontier
Fri 4/176:04 pm
ORD
- AUS
1 stop17h 17m
Frontier
Deal found 3/11![Frontier logo]()
$158
This Cheapflightsfares deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/81:26 pm
AUS
- ORD
1 stop10h 56m
Spirit Airlines
Sat 4/114:36 pm
ORD
- AUS
1 stop8h 06m
Spirit Airlines
Deal found 3/13![Spirit Airlines logo]()
$160
This Mytrip deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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 3/256:12 am
AUS
- ORD
1 stop13h 39m
Multiple Airlines
Mon 4/66:16 pm
ORD
- AUS
Nonstop3h 21m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$162
This Priceline deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/84:14 pm
AUS
- ORD
1 stop6h 25m
Multiple Airlines
Fri 4/104:36 pm
ORD
- AUS
1 stop7h 48m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/74:14 pm
AUS
- ORD
1 stop6h 25m
Multiple Airlines
Sat 4/114:36 pm
ORD
- AUS
1 stop8h 06m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$164
This Gotogate deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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.
Wed 3/256:12 am
AUS
- ORD
1 stop13h 39m
Multiple Airlines
Sun 4/54:41 pm
ORD
- AUS
Nonstop3h 21m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$165
This Super.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1010:06 pm
AUS
- ORD
Nonstop2h 52m
Frontier
Mon 4/136:05 pm
ORD
- AUS
Nonstop3h 21m
Frontier
Deal found 3/12![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/166:00 am
AUS
- ORD
1 stop15h 17m
Multiple Airlines
Sun 4/199:00 am
ORD
- AUS
Nonstop3h 21m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$167
This Frontier deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/88:48 pm
AUS
- ORD
Nonstop2h 54m
Frontier
Mon 5/184:48 pm
ORD
- AUS
Nonstop3h 05m
Frontier
Deal found 3/16![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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 5/158:48 pm
AUS
- ORD
Nonstop2h 54m
Frontier
Tue 5/199:42 pm
ORD
- AUS
1 stop22h 36m
Frontier
Deal found 3/12![Frontier logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
Sat 4/116:45 am
AUS
- ORD
1 stop17h 53m
Multiple Airlines
Mon 4/134:36 pm
ORD
- AUS
1 stop7h 48m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$170
This Super.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1310:11 pm
AUS
- ORD
Nonstop2h 52m
Frontier
Mon 4/209:00 am
ORD
- AUS
Nonstop3h 21m
Frontier
Deal found 3/14![Frontier logo]()
$171
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 March 16, 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 March 16, 2026.
This Southwest deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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 4/74:10 pm
AUS
- STL
1 stop5h 05m
Southwest
Wed 4/158:55 pm
STL
- AUS
Nonstop2h 10m
Southwest
Deal found 3/11![Southwest logo]()
$199
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/175:56 pm
AUS
- STL
1 stop4h 31m
United Airlines
Tue 4/216:00 am
STL
- AUS
1 stop7h 04m
United Airlines
Deal found 3/12![United Airlines logo]()
$234
This American Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:00 am
AUS
- MLI
2 stops7h 19m
American Airlines
Sat 5/236:56 pm
MLI
- AUS
1 stop4h 56m
American Airlines
Deal found 3/15![American Airlines logo]()
$236
This Delta deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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 4/255:25 am
AUS
- STL
1 stop5h 09m
Delta
Fri 5/16:50 pm
STL
- AUS
1 stop5h 27m
Delta
Deal found 3/11![Delta logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
Fri 6/126:51 pm
AUS
- RFD
1 stop13h 26m
Multiple Airlines
Sun 6/1411:27 am
RFD
- AUS
1 stop12h 32m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$300
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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 4/1712:40 pm
AUS
- STL
1 stop6h 05m
Southwest
Tue 4/218:55 pm
STL
- AUS
Nonstop2h 10m
Southwest
Deal found 3/12![Southwest logo]()
$229
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/912:40 pm
AUS
- STL
1 stop4h 00m
Southwest
Mon 4/131:55 pm
STL
- AUS
Nonstop2h 10m
Southwest
Deal found 3/15![Southwest logo]()
$231
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/143:43 pm
AUS
- STL
1 stop8h 14m
United Airlines
Wed 4/156:30 am
STL
- AUS
2 stops8h 54m
United Airlines
Deal found 3/12![United Airlines logo]()
$274
This Delta deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/115:15 am
AUS
- MDW
1 stop7h 27m
Delta
Mon 5/115:10 pm
MDW
- AUS
1 stop7h 21m
Delta
Deal found 3/15![Delta logo]()
$277
This Southwest deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:10 am
AUS
- MDW
Nonstop2h 30m
Southwest
Wed 5/208:55 pm
MDW
- AUS
Nonstop2h 40m
Southwest
Deal found 3/14![Southwest logo]()
$237
This Delta deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/115:15 am
AUS
- ORD
1 stop7h 46m
Delta
Mon 5/115:41 pm
ORD
- AUS
1 stop4h 54m
Delta
Deal found 3/16![Delta logo]()
$277
This American Airlines deal was found by Cheapflights users on 3/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/163:36 pm
AUS
- PIA
1 stop8h 16m
American Airlines
Tue 4/215:40 pm
PIA
- AUS
1 stop5h 10m
American Airlines
Deal found 3/13![American Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:00 pm
AUS
- MDW
Nonstop2h 35m
Southwest
Mon 5/119:30 pm
MDW
- AUS
Nonstop2h 40m
Southwest
Deal found 3/14![Southwest logo]()
$237
This United Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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 4/232:10 pm
AUS
- STL
2 stops9h 47m
United Airlines
Wed 4/296:30 am
STL
- AUS
2 stops10h 56m
United Airlines
Deal found 3/11![United Airlines logo]()
$295
This American Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:50 pm
AUS
- PIA
1 stop6h 02m
American Airlines
Mon 5/185:40 pm
PIA
- AUS
1 stop6h 07m
American Airlines
Deal found 3/14![American Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/175:10 am
AUS
- MDW
Nonstop2h 30m
Southwest
Sun 4/198:00 am
MDW
- AUS
Nonstop2h 45m
Southwest
Deal found 3/15![Southwest logo]()
$237
This United Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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 5/135:45 pm
AUS
- CMI
1 stop6h 18m
United Airlines
Wed 5/209:49 am
CMI
- AUS
1 stop6h 30m
United Airlines
Deal found 3/11![United Airlines logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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 5/217:48 pm
AUS
- RFD
1 stop23h 25m
Multiple Airlines
Thu 5/2811:27 am
RFD
- AUS
1 stop12h 32m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$380
This Southwest deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/219:30 am
AUS
- MDW
Nonstop2h 30m
Southwest
Tue 5/53:00 pm
MDW
- AUS
Nonstop2h 40m
Southwest
Deal found 3/16![Southwest logo]()
$237
This KAYAK deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:16 pm
AUS
- ORD
Nonstop2h 49m
American Airlines
Thu 4/167:10 am
ORD
- AUS
Nonstop2h 56m
American Airlines
Deal found 3/11![American Airlines logo]()
$321
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/82:48 pm
AUS
- BMI
1 stop7h 42m
Delta
Sat 5/96:00 am
BMI
- AUS
1 stop5h 19m
Delta
Deal found 3/13![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 3/13. 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 5/275:30 am
AUS
- CMI
2 stops7h 20m
United Airlines
Tue 6/26:30 am
CMI
- AUS
1 stop5h 26m
United Airlines
Deal found 3/13![United Airlines logo]()
$304
This Southwest deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/119:05 am
AUS
- STL
2 stops7h 10m
Southwest
Sat 4/1812:35 pm
STL
- AUS
1 stop4h 30m
Southwest
Deal found 3/14![Southwest logo]()
$242
This Delta deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/115:40 am
AUS
- BMI
1 stop5h 31m
Delta
Wed 7/156:01 am
BMI
- AUS
1 stop7h 47m
Delta
Deal found 3/14![Delta logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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 6/47:32 pm
AUS
- RFD
1 stop23h 31m
Multiple Airlines
Sun 6/711:27 am
RFD
- AUS
1 stop12h 32m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$405
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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 4/167:00 am
AUS
- PIA
1 stop7h 08m
United Airlines
Tue 4/218:05 am
PIA
- AUS
1 stop6h 03m
United Airlines
Deal found 3/12![United Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:25 am
AUS
- MDW
Nonstop2h 30m
Southwest
Sun 4/196:50 am
MDW
- AUS
1 stop4h 20m
Southwest
Deal found 3/12![Southwest logo]()
$247
This Delta deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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 7/166:30 am
AUS
- ORD
1 stop4h 59m
Delta
Mon 7/209:30 am
ORD
- AUS
1 stop7h 44m
Delta
Deal found 3/12![Delta logo]()
$337
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/85:45 pm
AUS
- CMI
1 stop6h 18m
United Airlines
Sat 5/95:45 am
CMI
- AUS
1 stop6h 36m
United Airlines
Deal found 3/12![United Airlines logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:32 pm
AUS
- RFD
1 stop23h 31m
Multiple Airlines
Mon 6/87:53 pm
RFD
- AUS
2 stops16h 08m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$421
Last-minute flights from Austin to IllinoisDiscover last-minute flight deals from Austin to Illinois. Data last updated March 16, 2026 and is based on user searches.
Discover last-minute flight deals from Austin to Illinois. Data last updated March 16, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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 3/256:12 am
AUS
- ORD
1 stop13h 39m
Multiple Airlines
Mon 4/66:16 pm
ORD
- AUS
Nonstop3h 21m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$162
This Gotogate deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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.
Wed 3/256:12 am
AUS
- ORD
1 stop13h 39m
Multiple Airlines
Sun 4/54:41 pm
ORD
- AUS
Nonstop3h 21m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/74:14 pm
AUS
- ORD
1 stop6h 25m
Multiple Airlines
Sat 4/114:36 pm
ORD
- AUS
1 stop8h 06m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$164
This Cheapflightsfares deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/81:26 pm
AUS
- ORD
1 stop10h 56m
Spirit Airlines
Sat 4/114:36 pm
ORD
- AUS
1 stop8h 06m
Spirit Airlines
Deal found 3/13![Spirit Airlines logo]()
$160
This Priceline deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/84:14 pm
AUS
- ORD
1 stop6h 25m
Multiple Airlines
Fri 4/104:36 pm
ORD
- AUS
1 stop7h 48m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/84:14 pm
AUS
- ORD
1 stop6h 25m
Frontier
Sun 4/124:41 pm
ORD
- AUS
Nonstop3h 21m
Frontier
Deal found 3/13![Frontier logo]()
$172
This Frontier deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/98:06 pm
AUS
- ORD
Nonstop2h 52m
Frontier
Thu 4/164:13 pm
ORD
- AUS
Nonstop3h 21m
Frontier
Deal found 3/16![Frontier logo]()
$168
This eDestinos deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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.
Fri 4/1010:06 pm
AUS
- ORD
Nonstop2h 52m
Frontier
Fri 4/176:04 pm
ORD
- AUS
1 stop17h 17m
Frontier
Deal found 3/11![Frontier logo]()
$158
This Super.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1010:06 pm
AUS
- ORD
Nonstop2h 52m
Frontier
Mon 4/136:05 pm
ORD
- AUS
Nonstop3h 21m
Frontier
Deal found 3/12![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
Sat 4/116:45 am
AUS
- ORD
1 stop17h 53m
Multiple Airlines
Mon 4/134:36 pm
ORD
- AUS
1 stop7h 48m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$170
This Super.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1310:11 pm
AUS
- ORD
Nonstop2h 52m
Frontier
Mon 4/209:00 am
ORD
- AUS
Nonstop3h 21m
Frontier
Deal found 3/14![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/166:00 am
AUS
- ORD
1 stop15h 17m
Multiple Airlines
Sun 4/199:00 am
ORD
- AUS
Nonstop3h 21m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$167
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 March 16, 2026.
Search for one-way flight options from Austin to Illinois. Find affordable one-way fares based on user searches. Data last updated March 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/77:00 am
AUS
- STL
1 stop26h 48m
Frontier
Deal found 3/11![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:13 pm
AUS
- STL
1 stop25h 08m
Frontier
Deal found 3/12![Frontier logo]()
$84
This Frontier deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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 4/84:14 pm
AUS
- MDW
1 stop6h 05m
Frontier
Deal found 3/12![Frontier logo]()
$90
This Booking.com deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/178:39 pm
AUS
- ORD
1 stop9h 29m
Frontier
Deal found 3/11![Frontier logo]()
$90
This Frontier deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:01 am
AUS
- STL
1 stop8h 20m
Frontier
Deal found 3/15![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:12 am
AUS
- RFD
1 stop27h 35m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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 4/126:45 am
AUS
- STL
1 stop27h 03m
Frontier
Deal found 3/12![Frontier logo]()
$91
This Super.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/167:12 pm
AUS
- MDW
1 stop12h 47m
Frontier
Deal found 3/13![Frontier logo]()
$94
This Super.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:31 pm
AUS
- ORD
1 stop12h 19m
Frontier
Deal found 3/13![Frontier logo]()
$94
This Super.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/189:13 pm
AUS
- ORD
1 stop23h 24m
Frontier
Deal found 3/15![Frontier logo]()
$95
This Super.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/3110:45 pm
AUS
- STL
1 stop11h 03m
Frontier
Deal found 3/13![Frontier logo]()
$95
This CheapOair deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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 4/1812:16 pm
AUS
- MDW
1 stop19h 43m
Frontier
Deal found 3/12![Frontier logo]()
$96
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 March 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $158 (eDestinos) |
One-way from | $82 (Kiwi.com) |
Popular in | March |
Cheapest in | January |
Average price | $328 |
Good round-trip deal | $298 or less |
Good one-way deal | $148 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 March 16, 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
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Tue 4/7
4:10 pm-9:15 pm
1 stop5h 05m
Lambert-St Louis
Wed 4/15
8:55 pm-11:05 pm
Nonstop2h 10m
$199
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Fri 4/17
12:40 pm-6:45 pm
1 stop6h 05m
Lambert-St Louis
Tue 4/21
8:55 pm-11:05 pm
Nonstop2h 10m
$229
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Thu 4/9
12:40 pm-4:40 pm
1 stop4h 00m
Lambert-St Louis
Mon 4/13
1:55 pm-4:05 pm
Nonstop2h 10m
$231
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Fri 4/17
5:56 pm-10:27 pm
1 stop4h 31m
Lambert-St Louis
Tue 4/21
6:00 am-1:04 pm
1 stop7h 04m
$234
AustinMoline
AUS - MLI
AUSMLI
Austin Bergstrom
Sat 5/16
5:00 am-12:19 pm
2 stops7h 19m
Moline Quad-City
Sat 5/23
6:56 pm-11:52 pm
1 stop4h 56m
$236
Quickest round-trip
AustinChicago
AUS - MDW
AUSMDW
Austin Bergstrom
Fri 5/15
5:10 am-7:40 am
Nonstop2h 30m
Chicago Midway
Wed 5/20
8:55 pm-11:35 pm
Nonstop2h 40m
$237
AustinChicago
AUS - MDW
AUSMDW
Austin Bergstrom
Wed 5/6
5:00 pm-7:35 pm
Nonstop2h 35m
Chicago Midway
Mon 5/11
9:30 pm-12:10 am
Nonstop2h 40m
$237
AustinChicago
AUS - MDW
AUSMDW
Austin Bergstrom
Fri 4/17
5:10 am-7:40 am
Nonstop2h 30m
Chicago Midway
Sun 4/19
8:00 am-10:45 am
Nonstop2h 45m
$237
AustinChicago
AUS - MDW
AUSMDW
Austin Bergstrom
Tue 4/21
9:30 am-12:00 pm
Nonstop2h 30m
Chicago Midway
Tue 5/5
3:00 pm-5:40 pm
Nonstop2h 40m
$237
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Sat 4/11
9:05 am-4:15 pm
2 stops7h 10m
Lambert-St Louis
Sat 4/18
12:35 pm-5:05 pm
1 stop4h 30m
$242
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-RFD
AUS-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 Austin to Illinois
AUS-USIL
AUS-STL
AUS-MDW
AUS-ORD
AUS-RFD
What is the cheapest month to book a flight from Austin to Illinois?
Currently, January is the cheapest month in which you can book a flight from Austin to Illinois (average of $54). Flying from Austin to Illinois in May is currently the most expensive (average of $158). 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 March 16, 2026.
Unlike in the afternoon, 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 March 14, 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 March 16, 2026.
The most flights from AUS to USIL are scheduled on a Monday (37 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (23 on average).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated March 16, 2026.
Get a feel of what it's like to fly with Southwest,United Airlines, andAmerican 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.
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
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.
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Alternative routes for Austin to Illinois
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Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from 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 March 16, 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 March 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$67 | Average$225 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$143 | Average$291 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$159 | Average$414 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$178 | Average$394 | FlexibilityNo cancel fee | On-time69% |