$76+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ORD
Jul 9 — Jul 161
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 June 9, 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 June 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 8/121:33 pm
AUS
- STL
1 stop28h 04m
Frontier
Wed 8/265:33 pm
STL
- AUS
1 stop23h 10m
Frontier
Deal found 6/8![Frontier logo]()
$170
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/127:30 am
AUS
- STL
Nonstop2h 05m
Southwest
Wed 8/268:25 am
STL
- AUS
Nonstop2h 00m
Southwest
Deal found 6/8![Southwest logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 7/165:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Tue 7/216:34 pm
STL
- AUS
1 stop18h 04m
Frontier
Deal found 6/7![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/305:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Tue 8/46:34 pm
STL
- AUS
1 stop18h 04m
Frontier
Deal found 6/5![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 8/71:33 pm
AUS
- STL
1 stop19h 24m
Frontier
Mon 8/104:57 pm
STL
- AUS
1 stop23h 42m
Frontier
Deal found 6/8![Frontier logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 7/215:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Tue 7/286:34 pm
STL
- AUS
1 stop18h 04m
Frontier
Deal found 6/9![Frontier logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 8/65:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Mon 8/104:57 pm
STL
- AUS
1 stop23h 42m
Frontier
Deal found 6/7![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/131:33 pm
AUS
- STL
1 stop28h 04m
Frontier
Sat 7/254:57 pm
STL
- AUS
1 stop23h 42m
Frontier
Deal found 6/5![Frontier logo]()
$218
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 7/305:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Sat 8/88:08 pm
STL
- AUS
1 stop27h 59m
Frontier
Deal found 6/7![Frontier logo]()
$222
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 7/83:00 pm
AUS
- MLI
1 stop7h 31m
Delta
Tue 7/145:56 am
MLI
- AUS
1 stop6h 29m
Delta
Deal found 6/8![Delta logo]()
$231
This Frontier deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 7/111:33 pm
AUS
- MDW
1 stop8h 30m
Frontier
Tue 7/146:05 am
MDW
- AUS
1 stop10h 34m
Frontier
Deal found 6/9![Frontier logo]()
$244
This Frontier deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 7/111:33 pm
AUS
- ORD
1 stop6h 20m
Frontier
Tue 7/147:05 am
ORD
- AUS
1 stop9h 34m
Frontier
Deal found 6/9![Frontier logo]()
$244
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 June 9, 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 June 9, 2026.
This Southwest deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 9/27:30 am
AUS
- STL
Nonstop2h 05m
Southwest
Mon 9/78:25 am
STL
- AUS
Nonstop2h 00m
Southwest
Deal found 6/7![Southwest logo]()
$246
This United Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 8/259:00 am
AUS
- ORD
Nonstop2h 55m
United Airlines
Tue 9/17:00 am
ORD
- AUS
Nonstop2h 58m
United Airlines
Deal found 6/6![United Airlines logo]()
$261
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/75:20 am
AUS
- MDW
1 stop7h 18m
Delta
Sat 7/116:00 am
MDW
- AUS
1 stop6h 25m
Delta
Deal found 6/6![Delta logo]()
$281
This American Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 9/110:33 am
AUS
- CMI
2 stops9h 55m
American Airlines
Sat 10/31:23 pm
CMI
- AUS
2 stops9h 13m
American Airlines
Deal found 6/7![American Airlines logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/3112:15 pm
AUS
- RFD
1 stop20h 00m
Multiple Airlines
Mon 8/37:50 pm
RFD
- AUS
2 stops20h 49m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$321
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/52:45 pm
AUS
- STL
1 stop5h 15m
Southwest
Sun 8/93:20 pm
STL
- AUS
1 stop5h 40m
Southwest
Deal found 6/9![Southwest logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/196:51 pm
AUS
- RFD
1 stop13h 26m
Allegiant Air
Sun 6/219:19 am
RFD
- AUS
2 stops24h 45m
Allegiant Air
Deal found 6/4![Allegiant Air logo]()
$516
This United Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 8/83:37 pm
AUS
- ORD
Nonstop3h 02m
United Airlines
Sat 8/151:30 pm
ORD
- AUS
Nonstop2h 54m
United Airlines
Deal found 6/5![United Airlines logo]()
$261
This Southwest deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 8/63:50 pm
AUS
- STL
Nonstop2h 05m
Southwest
Mon 8/103:45 pm
STL
- AUS
Nonstop2h 00m
Southwest
Deal found 6/7![Southwest logo]()
$261
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/214:55 pm
AUS
- MDW
1 stop5h 20m
Delta
Sat 7/251:49 pm
MDW
- AUS
1 stop7h 06m
Delta
Deal found 6/6![Delta logo]()
$291
This American Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 7/36:26 pm
AUS
- PIA
1 stop5h 56m
American Airlines
Tue 7/74:43 pm
PIA
- AUS
1 stop4h 54m
American Airlines
Deal found 6/9![American Airlines logo]()
$293
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/98:20 am
AUS
- ORD
Nonstop2h 57m
United Airlines
Sat 7/119:01 am
ORD
- AUS
Nonstop2h 58m
United Airlines
Deal found 6/8![United Airlines logo]()
$286
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 7/78:50 pm
AUS
- MDW
Nonstop2h 35m
Southwest
Tue 7/145:35 am
MDW
- AUS
Nonstop2h 30m
Southwest
Deal found 6/9![Southwest logo]()
$270
This American Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 9/86:27 am
AUS
- CMI
1 stop4h 44m
American Airlines
Tue 10/611:34 am
CMI
- AUS
1 stop6h 07m
American Airlines
Deal found 6/7![American Airlines logo]()
$306
This Trip.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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.
Mon 7/1310:42 am
AUS
- BMI
1 stop23h 16m
Multiple Airlines
Thu 7/167:59 pm
BMI
- AUS
1 stop13h 33m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$342
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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.
Sun 6/285:25 am
AUS
- BMI
1 stop6h 01m
Delta
Fri 7/36:00 am
BMI
- AUS
1 stop7h 39m
Delta
Deal found 6/6![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/177:44 pm
AUS
- ORD
1 stop5h 01m
United Airlines
Tue 7/217:58 pm
ORD
- AUS
Nonstop2h 56m
United Airlines
Deal found 6/5![United Airlines logo]()
$296
This Southwest deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/228:50 pm
AUS
- MDW
Nonstop2h 35m
Southwest
Sat 7/2512:55 pm
MDW
- AUS
1 stop6h 30m
Southwest
Deal found 6/6![Southwest logo]()
$271
This American Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 7/58:00 am
AUS
- SPI
1 stop6h 24m
American Airlines
Sat 7/115:00 am
SPI
- AUS
1 stop6h 13m
American Airlines
Deal found 6/9![American Airlines logo]()
$309
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 7/115:25 am
AUS
- BMI
1 stop5h 58m
Delta
Wed 7/1512:09 pm
BMI
- AUS
1 stop5h 10m
Delta
Deal found 6/8![Delta logo]()
$319
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:25 am
AUS
- STL
Nonstop2h 05m
Southwest
Sun 7/126:00 am
STL
- AUS
1 stop6h 15m
Southwest
Deal found 6/4![Southwest logo]()
$278
This American Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/46:26 pm
AUS
- BMI
1 stop6h 09m
American Airlines
Fri 7/104:30 pm
BMI
- AUS
1 stop6h 09m
American Airlines
Deal found 6/5![American Airlines logo]()
$309
This United Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/2312:59 pm
AUS
- ORD
Nonstop2h 58m
United Airlines
Sat 6/275:00 am
ORD
- AUS
1 stop6h 15m
United Airlines
Deal found 6/6![United Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 6/232:44 pm
AUS
- BMI
1 stop8h 03m
Delta
Tue 6/306:00 am
BMI
- AUS
1 stop6h 26m
Delta
Deal found 6/6![Delta logo]()
$334
This American Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/116:26 pm
AUS
- BMI
1 stop6h 09m
American Airlines
Wed 7/156:04 pm
BMI
- AUS
1 stop5h 55m
American Airlines
Deal found 6/5![American Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 7/93:35 pm
AUS
- MDW
Nonstop2h 30m
Southwest
Sat 7/118:25 pm
MDW
- AUS
Nonstop2h 40m
Southwest
Deal found 6/8![Southwest logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 7/312:15 pm
AUS
- RFD
1 stop20h 00m
Multiple Airlines
Fri 7/107:50 pm
RFD
- AUS
2 stops16h 48m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$434
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 6/275:25 am
AUS
- BMI
1 stop6h 01m
Delta
Mon 6/296:00 am
BMI
- AUS
1 stop6h 26m
Delta
Deal found 6/6![Delta logo]()
$334
This United Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 8/71:01 pm
AUS
- ORD
Nonstop2h 56m
United Airlines
Sun 8/97:00 am
ORD
- AUS
Nonstop2h 56m
United Airlines
Deal found 6/7![United Airlines logo]()
$336
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 6/3011:00 am
AUS
- STL
Nonstop2h 05m
Southwest
Wed 7/11:50 pm
STL
- AUS
Nonstop2h 00m
Southwest
Deal found 6/8![Southwest logo]()
$289
Last-minute flights from Austin to IllinoisDiscover last-minute flight deals from Austin to Illinois. Data last updated June 9, 2026 and is based on user searches.
Discover last-minute flight deals from Austin to Illinois. Data last updated June 9, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 7/83:00 pm
AUS
- MLI
1 stop7h 31m
Delta
Tue 7/145:56 am
MLI
- AUS
1 stop6h 29m
Delta
Deal found 6/8![Delta logo]()
$231
This Kiwi.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/101:33 pm
AUS
- STL
1 stop19h 24m
Frontier
Mon 7/134:57 pm
STL
- AUS
1 stop23h 42m
Frontier
Deal found 6/5![Frontier logo]()
$230
This Frontier deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 7/111:33 pm
AUS
- MDW
1 stop8h 30m
Frontier
Tue 7/146:05 am
MDW
- AUS
1 stop10h 34m
Frontier
Deal found 6/9![Frontier logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/131:33 pm
AUS
- STL
1 stop28h 04m
Frontier
Sat 7/254:57 pm
STL
- AUS
1 stop23h 42m
Frontier
Deal found 6/5![Frontier logo]()
$218
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/165:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Tue 7/216:34 pm
STL
- AUS
1 stop18h 04m
Frontier
Deal found 6/6![Frontier logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 7/215:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Tue 7/286:34 pm
STL
- AUS
1 stop18h 04m
Frontier
Deal found 6/9![Frontier logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 7/215:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Sun 7/266:34 pm
STL
- AUS
1 stop18h 04m
Frontier
Deal found 6/8![Frontier logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/215:34 pm
AUS
- MDW
1 stop17h 33m
Frontier
Tue 7/2812:11 pm
MDW
- AUS
1 stop24h 27m
Frontier
Deal found 6/6![Frontier logo]()
$248
This Kiwi.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/251:33 pm
AUS
- STL
1 stop28h 04m
Frontier
Wed 7/294:57 pm
STL
- AUS
1 stop23h 42m
Frontier
Deal found 6/5![Frontier logo]()
$247
This Frontier deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 7/291:33 pm
AUS
- MDW
1 stop8h 30m
Frontier
Mon 8/36:05 am
MDW
- AUS
1 stop6h 33m
Frontier
Deal found 6/9![Frontier logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/305:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Tue 8/46:34 pm
STL
- AUS
1 stop18h 04m
Frontier
Deal found 6/5![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 7/305:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Sat 8/88:08 pm
STL
- AUS
1 stop27h 59m
Frontier
Deal found 6/7![Frontier logo]()
$222
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 June 9, 2026.
Search for one-way flight options from Austin to Illinois. Find affordable one-way fares based on user searches. Data last updated June 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/318:15 pm
AUS
- STL
1 stop23h 08m
Frontier
Deal found 6/4![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:58 am
AUS
- STL
1 stop9h 25m
Frontier
Deal found 6/4![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/45:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Deal found 6/9![Frontier logo]()
$82
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/53:50 pm
AUS
- STL
Nonstop2h 05m
Southwest
Deal found 6/9![Southwest logo]()
$87
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 8/55:15 am
AUS
- STL
1 stop6h 31m
Delta
Deal found 6/9![Delta logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 8/31:33 pm
AUS
- STL
1 stop28h 04m
Frontier
Deal found 6/7![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 9/512:44 pm
AUS
- STL
1 stop28h 46m
Frontier
Deal found 6/9![Frontier logo]()
$95
This Trip.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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.
Sun 8/165:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Deal found 6/9![Frontier logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 8/95:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Deal found 6/9![Frontier logo]()
$104
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 8/11:33 pm
AUS
- STL
1 stop28h 04m
Frontier
Deal found 6/7![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 7/215:34 pm
AUS
- STL
1 stop15h 23m
Frontier
Deal found 6/9![Frontier logo]()
$106
This American Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 8/65:00 am
AUS
- STL
1 stop4h 24m
American Airlines
Deal found 6/9![American Airlines logo]()
$107
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 June 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $170 (Kiwi.com) |
One-way from | $76 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $344 |
Good round-trip deal | $305 or less |
Good one-way deal | $155 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 June 9, 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
Quickest round-trip
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Wed 9/2
7:30 am-9:35 am
Nonstop2h 05m
Lambert-St Louis
Mon 9/7
8:25 am-10:25 am
Nonstop2h 00m
$246
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Wed 8/5
2:45 pm-8:00 pm
1 stop5h 15m
Lambert-St Louis
Sun 8/9
3:20 pm-9:00 pm
1 stop5h 40m
$249
AustinChicago
AUS - ORD
AUSORD
Austin Bergstrom
Tue 8/25
9:00 am-11:55 am
Nonstop2h 55m
Chicago O'Hare Intl
Tue 9/1
7:00 am-9:58 am
Nonstop2h 58m
$261
AustinChicago
AUS - ORD
AUSORD
Austin Bergstrom
Sat 8/8
3:37 pm-6:39 pm
Nonstop3h 02m
Chicago O'Hare Intl
Sat 8/15
1:30 pm-4:24 pm
Nonstop2h 54m
$261
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Thu 8/6
3:50 pm-5:55 pm
Nonstop2h 05m
Lambert-St Louis
Mon 8/10
3:45 pm-5:45 pm
Nonstop2h 00m
$261
AustinChicago
AUS - MDW
AUSMDW
Austin Bergstrom
Tue 7/7
8:50 pm-11:25 pm
Nonstop2h 35m
Chicago Midway
Tue 7/14
5:35 am-8:05 am
Nonstop2h 30m
$270
AustinChicago
AUS - MDW
AUSMDW
Austin Bergstrom
Wed 7/22
8:50 pm-11:25 pm
Nonstop2h 35m
Chicago Midway
Sat 7/25
12:55 pm-7:25 pm
1 stop6h 30m
$271
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Wed 7/8
7:25 am-9:30 am
Nonstop2h 05m
Lambert-St Louis
Sun 7/12
6:00 am-12:15 pm
1 stop6h 15m
$278
AustinChicago
AUS - MDW
AUSMDW
Austin Bergstrom
Tue 7/7
5:20 am-12:38 pm
1 stop7h 18m
Chicago Midway
Sat 7/11
6:00 am-12:25 pm
1 stop6h 25m
$281
AustinChampaign
AUS - CMI
AUSCMI
Austin Bergstrom
Tue 9/1
10:33 am-8:28 pm
2 stops9h 55m
Champaign University-Willard
Sat 10/3
1:23 pm-10:36 pm
2 stops9h 13m
$281
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-MLI
AUS-MDW
AUS-ORD
AUS-CMI
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-MLI
AUS-MDW
AUS-ORD
What is the cheapest month to book a flight from Austin to Illinois?
Currently, November is the cheapest month in which you can book a flight from Austin to Illinois (average of $49). Flying from Austin to Illinois in March is currently the most expensive (average of $1,034). 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 June 9, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 44% on flights from Austin to Illinois by exploring options for tickets in the evening.
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 June 9, 2026.
The most flights from AUS to USIL are scheduled on a Tuesday (43 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (20 on average).
How much does it cost to fly round-trip from Austin to Illinois?
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 79 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 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 June 8, 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.
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 June 9, 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.
Entertainment
7.5
Food
7.0
Overall
7.9
Crew
8.6
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Entertainment
7.5
Food
7.0
Overall
7.9
Crew
8.6
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Entertainment
7.5
Food
7.0
Overall
7.9
Crew
8.6
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Entertainment
7.5
Food
7.0
Overall
7.9
Crew
8.6
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Entertainment
7.5
Food
7.0
Overall
7.9
Crew
8.6
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Entertainment
7.5
Food
7.0
Overall
7.9
Crew
8.6
Comfort
8.0
Boarding
8.1
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
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 June 9, 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 June 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$70 | Average$242 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$143 | Average$328 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$166 | Average$405 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$187 | Average$348 | FlexibilityNo cancel fee | On-time69% |