$80+ Cheap flights from Austin (AUS) to Illinois
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ORD
Oct 12 — Oct 191
Round-trip
1 adult, Economy
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Find cheap flights from Austin to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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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 September 12, 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 September 12, 2026.
This Frontier deal was found by Cheapflights users on 9/9. 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 10/33:32 pm -
1 stop19h 45m
Mon 10/55:19 pm -
1 stop16h 44m
Deal found 9/9![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Fri 10/3012:20 pm -
1 stop5h 20m
Mon 11/26:44 pm -
1 stop16h 41m
Deal found 9/9![Frontier logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Fri 10/2312:08 pm -
1 stop5h 32m
Fri 10/306:44 pm -
1 stop18h 16m
Deal found 9/9![Frontier logo]()
$184
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 11/612:20 pm -
1 stop5h 20m
Mon 11/97:59 pm -
1 stop23h 27m
Deal found 9/10![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Fri 10/168:21 pm -
1 stop22h 36m
Mon 10/196:35 pm -
1 stop16h 22m
Deal found 9/11![Frontier logo]()
$197
This Trip.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 10/2812:24 pm -
1 stop5h 16m
Sun 11/14:26 pm -
1 stop18h 32m
Deal found 9/10![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Thu 10/84:27 pm -
2 stops25h 13m
Mon 10/126:35 pm -
1 stop16h 22m
Deal found 9/9![Frontier logo]()
$212
This Southwest deal was found by Cheapflights users on 9/9. 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.
Sat 10/37:15 am -
Nonstop2h 05m
Mon 10/59:45 pm -
Nonstop2h 10m
Deal found 9/9![Southwest logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/201:12 pm -
2 stops28h 28m
Mon 10/266:35 pm -
1 stop16h 50m
Deal found 9/11![Frontier logo]()
$218
This Super.com deal was found by Cheapflights users on 9/9. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3012:20 pm -
1 stop5h 20m
Sun 11/14:26 pm -
1 stop18h 32m
Deal found 9/9![Frontier logo]()
$225
This American Airlines deal was found by Cheapflights users on 9/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/214:29 pm -
1 stop6h 48m
Tue 10/276:00 am -
1 stop5h 04m
Deal found 9/8![American Airlines logo]()
$241
This Frontier deal was found by Cheapflights users on 9/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/219:14 pm -
1 stop22h 33m
Wed 11/258:42 pm -
1 stop19h 03m
Deal found 9/7![Frontier logo]()
$256
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 September 12, 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 September 12, 2026.
This Southwest deal was found by Cheapflights users on 9/8. 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.
Sat 10/177:15 am -
Nonstop2h 05m
Mon 10/269:45 pm -
Nonstop2h 10m
Deal found 9/8![Southwest logo]()
$217
This American Airlines deal was found by Cheapflights users on 9/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:00 am -
1 stop5h 03m
Tue 10/275:02 pm -
1 stop7h 39m
Deal found 9/12![American Airlines logo]()
$261
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 11/145:40 pm -
1 stop7h 05m
Mon 11/238:40 am -
Nonstop3h 01m
Deal found 9/10![United Airlines logo]()
$310
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 11/116:25 am -
1 stop8h 24m
Sat 11/148:04 am -
1 stop5h 49m
Deal found 9/10![Delta logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 11/111:17 pm -
1 stop30h 45m
Sun 11/158:37 pm -
1 stop15h 36m
Deal found 9/12![Multiple Airlines logo]()
$384
This Southwest deal was found by Cheapflights users on 9/9. 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.
Fri 10/236:55 pm -
Nonstop2h 05m
Fri 10/306:10 pm -
1 stop6h 05m
Deal found 9/9![Southwest logo]()
$267
This Southwest deal was found by Cheapflights users on 9/11. 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.
Wed 11/412:15 pm -
Nonstop2h 05m
Fri 11/69:50 pm -
Nonstop2h 05m
Deal found 9/11![Southwest logo]()
$269
This United Airlines deal was found by Cheapflights users on 9/8. 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 10/16:50 am -
1 stop5h 23m
Mon 10/55:36 pm -
1 stop5h 22m
Deal found 9/8![United Airlines logo]()
$317
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 12/35:20 am -
1 stop5h 06m
Mon 12/711:08 am -
1 stop6h 31m
Deal found 9/10![Delta logo]()
$319
This American Airlines deal was found by Cheapflights users on 9/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:11 pm -
2 stops8h 48m
Sat 10/313:58 pm -
1 stop6h 45m
Deal found 9/8![American Airlines logo]()
$324
This Southwest deal was found by Cheapflights users on 9/7. 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 10/74:35 pm -
2 stops6h 40m
Mon 10/129:45 pm -
Nonstop2h 10m
Deal found 9/7![Southwest logo]()
$279
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 11/204:17 pm -
1 stop6h 09m
Wed 11/256:15 am -
1 stop4h 54m
Deal found 9/10![United Airlines logo]()
$317
This Delta deal was found by Cheapflights users on 9/11. 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.
Wed 10/215:10 am -
1 stop7h 37m
Sat 10/244:19 pm -
1 stop7h 05m
Deal found 9/11![Delta logo]()
$331
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/74:59 pm -
1 stop7h 00m
Sat 12/53:58 pm -
1 stop7h 01m
Deal found 9/11![American Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Tue 12/225:35 pm -
1 stop4h 55m
Wed 1/68:05 am -
2 stops9h 14m
Deal found 9/8![United Airlines logo]()
$322
This Delta deal was found by Cheapflights users on 9/9. 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 11/186:11 am -
1 stop5h 39m
Sun 11/226:00 am -
1 stop6h 47m
Deal found 9/9![Delta logo]()
$336
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 10/217:00 am -
Nonstop2h 30m
Sat 10/242:20 pm -
2 stops6h 15m
Deal found 9/10![Southwest logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Wed 11/41:17 pm -
1 stop30h 45m
Sun 11/88:37 pm -
1 stop15h 36m
Deal found 9/11![Multiple Airlines logo]()
$413
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/128:11 am -
1 stop5h 47m
Sat 12/52:34 pm -
2 stops8h 25m
Deal found 9/11![American Airlines logo]()
$344
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/218:45 am -
Nonstop2h 56m
Mon 10/265:27 pm -
1 stop5h 48m
Deal found 9/11![United Airlines logo]()
$326
This Delta deal was found by Cheapflights users on 9/9. 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.
Thu 11/512:02 pm -
1 stop8h 28m
Mon 11/95:30 am -
1 stop8h 23m
Deal found 9/9![Delta logo]()
$337
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 11/208:20 am -
1 stop5h 45m
Wed 11/259:50 pm -
Nonstop2h 05m
Deal found 9/10![Southwest logo]()
$309
This American Airlines deal was found by Cheapflights users on 9/7. 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 9/2210:39 am -
1 stop5h 24m
Sat 9/264:33 pm -
1 stop6h 03m
Deal found 9/7![American Airlines logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 10/910:12 pm -
1 stop21h 56m
Wed 10/149:34 am -
1 stop24h 23m
Deal found 9/10![Multiple Airlines logo]()
$451
This Delta deal was found by Cheapflights users on 9/11. 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.
Thu 11/124:51 pm -
1 stop5h 40m
Sat 12/512:06 pm -
1 stop6h 30m
Deal found 9/11![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Mon 11/93:49 pm -
Nonstop2h 51m
Fri 11/139:21 am -
1 stop6h 00m
Deal found 9/8![United Airlines logo]()
$340
This Southwest deal was found by Cheapflights users on 9/7. 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.
Tue 10/62:25 pm -
Nonstop2h 35m
Tue 10/139:25 am -
1 stop5h 35m
Deal found 9/7![Southwest logo]()
$314
This American Airlines deal was found by Cheapflights users on 9/9. 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 9/256:38 pm -
1 stop5h 25m
Tue 9/295:02 am -
1 stop6h 08m
Deal found 9/9![American Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 10/305:00 pm -
Nonstop2h 55m
Mon 11/28:40 am -
Nonstop3h 01m
Deal found 9/11![United Airlines logo]()
$341
This Southwest deal was found by Cheapflights users on 9/7. 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 10/15:05 am -
Nonstop2h 30m
Tue 10/68:40 pm -
Nonstop2h 40m
Deal found 9/7![Southwest logo]()
$317
Last-minute flights from Austin to IllinoisDiscover last-minute flight deals from Austin to Illinois. Data last updated September 12, 2026 and is based on user searches.
Discover last-minute flight deals from Austin to Illinois. Data last updated September 12, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 9/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:32 pm -
1 stop14h 06m
Tue 9/296:20 am -
1 stop11h 28m
Deal found 9/7![Frontier logo]()
$259
This Frontier deal was found by Cheapflights users on 9/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2810:58 am -
1 stop12h 01m
Sat 10/36:20 am -
1 stop11h 28m
Deal found 9/7![Frontier logo]()
$258
This Frontier deal was found by Cheapflights users on 9/9. 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 10/33:32 pm -
1 stop19h 45m
Mon 10/55:19 pm -
1 stop16h 44m
Deal found 9/9![Frontier logo]()
$180
This Southwest deal was found by Cheapflights users on 9/9. 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.
Sat 10/37:15 am -
Nonstop2h 05m
Mon 10/59:45 pm -
Nonstop2h 10m
Deal found 9/9![Southwest logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Thu 10/84:27 pm -
2 stops25h 13m
Mon 10/126:35 pm -
1 stop16h 22m
Deal found 9/9![Frontier logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Fri 10/168:21 pm -
1 stop22h 36m
Mon 10/196:35 pm -
1 stop16h 22m
Deal found 9/11![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/201:12 pm -
2 stops28h 28m
Mon 10/266:35 pm -
1 stop16h 50m
Deal found 9/11![Frontier logo]()
$218
This American Airlines deal was found by Cheapflights users on 9/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/214:29 pm -
1 stop6h 48m
Tue 10/276:00 am -
1 stop5h 04m
Deal found 9/8![American Airlines logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Fri 10/2312:08 pm -
1 stop5h 32m
Fri 10/306:44 pm -
1 stop18h 16m
Deal found 9/9![Frontier logo]()
$184
This Trip.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 10/2812:24 pm -
1 stop5h 16m
Sun 11/14:26 pm -
1 stop18h 32m
Deal found 9/10![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Fri 10/3012:20 pm -
1 stop5h 20m
Mon 11/26:44 pm -
1 stop16h 41m
Deal found 9/9![Frontier logo]()
$183
This Super.com deal was found by Cheapflights users on 9/9. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3012:20 pm -
1 stop5h 20m
Sun 11/14:26 pm -
1 stop18h 32m
Deal found 9/9![Frontier logo]()
$225
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 September 12, 2026.
Search for one-way flight options from Austin to Illinois. Find affordable one-way fares based on user searches. Data last updated September 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 9/296:33 pm -
1 stop18h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/66:33 pm -
1 stop18h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 11/123:43 pm -
1 stop25h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 12/105:20 am -
1 stop25h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$94
This Frontier deal was found by Cheapflights users on 9/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1510:52 am -
1 stop12h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$95
This Trip.com deal was found by Cheapflights users on 9/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:33 pm -
1 stop18h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$97
This Priceline deal was found by Cheapflights users on 9/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1112:24 pm -
1 stop5h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 11/108:21 pm -
1 stop19h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$101
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 11/612:20 pm -
1 stop5h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$107
This Southwest deal was found by Cheapflights users on 9/8. 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 9/297:30 am -
Nonstop2h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Southwest logo]()
$109
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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.
Sun 12/65:20 am -
1 stop7h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$131
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 11/612:20 pm -
1 stop6h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$131
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 September 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $180 (Frontier) |
One-way from | $80 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $352 |
Good round-trip deal | $333 or less |
Good one-way deal | $191 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 7,457,451 searches. Data last updated September 12, 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 Austin Bergstrom - STL Lambert-St Louis
AUSSTL
Austin Bergstrom
Sat 10/3
7:15 am-9:20 am
Nonstop2h 05m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$109
AustinSt. Louis
AUS Austin Bergstrom - STL Lambert-St Louis
AUSSTL
Austin Bergstrom
Wed 10/7
12:35 pm-2:40 pm
Nonstop2h 05m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$109
AustinSt. Louis
AUS Austin Bergstrom - STL Lambert-St Louis
AUSSTL
Austin Bergstrom
Wed 12/9
12:15 pm-2:20 pm
Nonstop2h 05m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$109
AustinSt. Louis
AUS Austin Bergstrom - STL Lambert-St Louis
AUSSTL
Austin Bergstrom
Sat 10/3
3:37 pm-9:21 pm
1 stop5h 44m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$114
AustinSt. Louis
AUS Austin Bergstrom - STL Lambert-St Louis
AUSSTL
Austin Bergstrom
Tue 10/6
4:49 pm-11:54 pm
1 stop7h 05m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$119
AustinSt. Louis
AUS Austin Bergstrom - STL Lambert-St Louis
AUSSTL
Austin Bergstrom
Wed 10/7
6:20 am-1:20 pm
1 stop7h 00m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$119
AustinSt. Louis
AUS Austin Bergstrom - STL Lambert-St Louis
AUSSTL
Austin Bergstrom
Sat 10/10
5:20 am-10:51 am
1 stop5h 31m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$119
AustinSt. Louis
AUS Austin Bergstrom - STL Lambert-St Louis
AUSSTL
Austin Bergstrom
Sat 10/3
6:25 am-12:32 pm
1 stop6h 07m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$119
AustinSt. Louis
AUS Austin Bergstrom - STL Lambert-St Louis
AUSSTL
Austin Bergstrom
Mon 10/5
6:25 am-12:55 pm
1 stop6h 30m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$119
AustinSt. Louis
AUS Austin Bergstrom - STL Lambert-St Louis
AUSSTL
Austin Bergstrom
Mon 11/9
3:20 pm-9:20 pm
2 stops6h 00m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$124
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-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-MLI
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 $222). Flying from Austin to Illinois in June is currently the most expensive (average of $358). 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 September 12, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 41% 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 September 12, 2026.
The most flights from AUS to USIL are scheduled on a Friday (36 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (27 on average).
How much does it cost to fly round-trip from Austin to Illinois?
Airfare is typical for this route at the moment.
Austin to Illinois flights typically cost between $202 and $380 in November.The cheapest round-trip price found within the last 5 days was $257 on Frontier (Nov 11-Nov 15).
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 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 September 5, 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. Sunday 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 September 12, 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.
Food
7.0
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
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 September 12, 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 6 airlines flying from Austin to Illinois
Discover the top 6 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 7,457,451 searches. Data last updated September 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$62 | Average$233 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$162 | Average$547 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$174 | Average$424 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$181 | Average$355 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$264 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$200 | Average$353 | FlexibilityNo cancel fee | On-time69% |