$81+ Cheap flights from Illinois to Austin (AUS)
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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — AUS
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Austin 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 Illinois to AustinExplore the most affordable flight options available from Illinois to Austin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
Explore the most affordable flight options available from Illinois to Austin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
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.
Wed 10/72:29 pm -
1 stop21h 00m
Wed 10/1412:08 pm -
1 stop5h 32m
Deal found 9/9![Frontier logo]()
$156
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 10/166:35 pm -
1 stop16h 22m
Mon 10/1910:52 am -
1 stop12h 21m
Deal found 9/9![Frontier logo]()
$204
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 10/28:10 pm -
1 stop23h 19m
Sat 11/75:57 pm -
1 stop29h 19m
Deal found 9/9![Frontier logo]()
$206
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.
Mon 10/126:35 pm -
1 stop16h 22m
Fri 10/1610:52 am -
1 stop12h 21m
Deal found 9/9![Frontier logo]()
$209
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/28:10 pm -
1 stop23h 19m
Tue 10/68:24 pm -
1 stop27h 35m
Deal found 9/9![Frontier logo]()
$210
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.
Wed 11/46:44 pm -
1 stop19h 10m
Wed 11/118:21 pm -
2 stops45h 19m
Deal found 9/9![Frontier logo]()
$211
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.
Thu 10/294:26 pm -
1 stop18h 32m
Mon 11/212:20 pm -
1 stop5h 20m
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.
Tue 10/202:25 pm -
Nonstop2h 05m
Thu 10/225:00 pm -
Nonstop2h 05m
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.
Wed 10/146:35 pm -
2 stops20h 57m
Mon 10/1910:52 am -
1 stop12h 21m
Deal found 9/9![Frontier logo]()
$219
This American Airlines deal was found by Cheapflights users on 9/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/511:33 am -
1 stop5h 32m
Wed 12/95:09 pm -
1 stop6h 58m
Deal found 9/6![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.
Sun 11/156:16 am -
1 stop7h 38m
Wed 11/1812:24 pm -
1 stop5h 23m
Deal found 9/7![Frontier logo]()
$247
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.
Fri 11/136:30 am -
1 stop12h 56m
Tue 11/1712:20 pm -
1 stop5h 56m
Deal found 9/7![Frontier logo]()
$247
Best flights from Illinois to AustinDiscover carefully curated flight deals from Illinois to Austin that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
Discover carefully curated flight deals from Illinois to Austin that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
This American Airlines deal was found by Cheapflights users on 9/5. 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.
Wed 10/75:03 pm -
1 stop7h 38m
Wed 10/146:00 am -
1 stop5h 03m
Deal found 9/5![American Airlines logo]()
$241
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.
Mon 10/129:45 pm -
Nonstop2h 10m
Fri 10/168:25 am -
1 stop4h 20m
Deal found 9/9![Southwest logo]()
$247
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.
Fri 10/26:54 pm -
1 stop5h 05m
Sun 10/45:15 am -
1 stop5h 40m
Deal found 9/9![Delta logo]()
$288
This United Airlines deal was found by Cheapflights users on 9/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:03 pm -
Nonstop2h 55m
Wed 10/216:06 pm -
1 stop5h 53m
Deal found 9/4![United Airlines logo]()
$301
This American Airlines deal was found by Cheapflights users on 9/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/55:13 pm -
1 stop5h 46m
Wed 12/94:21 pm -
2 stops7h 46m
Deal found 9/6![American Airlines logo]()
$246
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.
Wed 9/308:40 am -
1 stop3h 35m
Fri 10/97:50 pm -
1 stop4h 50m
Deal found 9/9![Southwest logo]()
$257
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/297:16 pm -
1 stop22h 48m
Sun 11/87:15 am -
2 stops22h 25m
Deal found 9/7![Alaska Airlines logo]()
$531
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.
Sun 11/159:50 pm -
Nonstop2h 05m
Wed 11/1812:15 pm -
Nonstop2h 05m
Deal found 9/9![Southwest logo]()
$258
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:00 am -
1 stop6h 32m
Wed 10/214:49 pm -
1 stop5h 41m
Deal found 9/8![Delta logo]()
$290
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 10/18:03 pm -
Nonstop2h 55m
Tue 10/66:50 am -
Nonstop2h 55m
Deal found 9/8![United Airlines logo]()
$317
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/135:04 pm -
1 stop6h 20m
Tue 10/204:49 pm -
1 stop5h 41m
Deal found 9/8![Delta logo]()
$290
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 11/129:50 pm -
Nonstop2h 05m
Thu 11/193:15 pm -
Nonstop2h 05m
Deal found 9/7![Southwest logo]()
$269
This American Airlines deal was found by Cheapflights users on 9/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/295:02 pm -
1 stop7h 39m
Sun 11/86:03 am -
1 stop4h 47m
Deal found 9/4![American Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 9/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/276:00 am -
1 stop7h 56m
Sun 2/215:40 am -
1 stop5h 08m
Deal found 9/5![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 9/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/47:29 am -
1 stop5h 48m
Fri 11/612:49 pm -
Nonstop2h 49m
Deal found 9/4![United Airlines logo]()
$346
This American Airlines deal was found by Cheapflights users on 9/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:30 pm -
1 stop5h 06m
Mon 10/196:00 am -
1 stop6h 01m
Deal found 9/4![American Airlines logo]()
$319
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.
Wed 10/142:25 pm -
Nonstop2h 05m
Mon 10/197:35 am -
Nonstop2h 05m
Deal found 9/9![Southwest logo]()
$302
This United Airlines deal was found by Cheapflights users on 9/6. 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 11/247:29 am -
1 stop5h 48m
Mon 11/305:00 pm -
Nonstop2h 55m
Deal found 9/6![United Airlines logo]()
$346
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 2/116:01 am -
1 stop5h 18m
Sun 2/145:40 am -
1 stop5h 37m
Deal found 9/9![Delta logo]()
$319
This American Airlines deal was found by Cheapflights users on 9/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/302:59 pm -
1 stop7h 37m
Tue 11/38:11 am -
1 stop6h 39m
Deal found 9/6![American Airlines logo]()
$329
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.
Wed 11/113:55 pm -
Nonstop2h 45m
Mon 11/1612:55 pm -
1 stop4h 10m
Deal found 9/8![Southwest logo]()
$310
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 11/165:55 pm -
1 stop5h 20m
Sun 11/225:15 am -
2 stops10h 28m
Deal found 9/8![United Airlines logo]()
$363
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.
Sat 10/36:00 am -
1 stop5h 10m
Sat 10/177:41 am -
1 stop6h 48m
Deal found 9/8![American Airlines logo]()
$339
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 10/145:40 am -
1 stop5h 00m
Sat 10/171:35 pm -
1 stop4h 40m
Deal found 9/7![Southwest logo]()
$311
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/263:47 pm -
1 stop5h 30m
Tue 12/18:15 am -
1 stop8h 02m
Deal found 9/7![Delta logo]()
$356
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:35 pm -
1 stop19h 56m
Sun 11/87:15 am -
2 stops22h 25m
Deal found 9/6![Alaska Airlines logo]()
$531
This United Airlines deal was found by Cheapflights users on 9/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/198:13 am -
2 stops7h 13m
Wed 9/235:30 am -
2 stops7h 01m
Deal found 9/4![United Airlines logo]()
$371
This American Airlines deal was found by Cheapflights users on 9/5. 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.
Fri 12/46:05 am -
1 stop5h 31m
Fri 12/115:00 am -
2 stops9h 37m
Deal found 9/5![American Airlines logo]()
$344
This Southwest deal was found by Cheapflights users on 9/6. 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 11/113:55 pm -
Nonstop2h 45m
Sun 11/159:40 pm -
Nonstop2h 25m
Deal found 9/6![Southwest logo]()
$316
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.
Sat 10/247:05 pm -
Nonstop2h 40m
Mon 10/269:55 pm -
Nonstop2h 35m
Deal found 9/7![Southwest logo]()
$316
Last-minute flights from Illinois to AustinDiscover last-minute flight deals from Illinois to Austin. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Austin. Data last updated September 10, 2026 and is based on user searches.
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 10/28:10 pm -
1 stop23h 19m
Sat 11/75:57 pm -
1 stop29h 19m
Deal found 9/9![Frontier logo]()
$206
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/28:10 pm -
1 stop23h 19m
Tue 10/68:24 pm -
1 stop27h 35m
Deal found 9/9![Frontier logo]()
$210
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.
Wed 10/72:29 pm -
1 stop21h 00m
Wed 10/1412:08 pm -
1 stop5h 32m
Deal found 9/9![Frontier logo]()
$156
This American Airlines deal was found by Cheapflights users on 9/5. 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.
Wed 10/75:03 pm -
1 stop7h 38m
Wed 10/146:00 am -
1 stop5h 03m
Deal found 9/5![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.
Mon 10/126:35 pm -
1 stop16h 22m
Fri 10/1610:52 am -
1 stop12h 21m
Deal found 9/9![Frontier logo]()
$209
This Gotogate deal was found by Cheapflights users on 9/4. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:30 am -
1 stop12h 56m
Tue 10/208:21 pm -
1 stop28h 03m
Deal found 9/4![Frontier logo]()
$252
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.
Wed 10/146:35 pm -
2 stops20h 57m
Mon 10/1910:52 am -
1 stop12h 21m
Deal found 9/9![Frontier logo]()
$219
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 10/166:35 pm -
1 stop16h 22m
Mon 10/1910:52 am -
1 stop12h 21m
Deal found 9/9![Frontier logo]()
$204
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.
Tue 10/202:25 pm -
Nonstop2h 05m
Thu 10/225:00 pm -
Nonstop2h 05m
Deal found 9/9![Southwest logo]()
$217
This Booking.com deal was found by Cheapflights users on 9/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:46 am -
1 stop8h 28m
Mon 10/269:12 pm -
1 stop8h 04m
Deal found 9/6![Frontier logo]()
$247
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:46 am -
1 stop8h 28m
Sun 11/11:08 pm -
1 stop16h 05m
Deal found 9/7![Frontier logo]()
$253
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.
Thu 10/294:26 pm -
1 stop18h 32m
Mon 11/212:20 pm -
1 stop5h 20m
Deal found 9/9![Frontier logo]()
$212
One-way flights from Illinois to AustinSearch for one-way flight options from Illinois to Austin. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
Search for one-way flight options from Illinois to Austin. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
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.
Wed 10/72:29 pm -
1 stop21h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Mon 10/126:35 pm -
1 stop16h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$86
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.
Mon 10/52:29 pm -
1 stop27h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$87
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 10/96:35 pm -
1 stop16h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$92
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.
Thu 10/84:30 pm -
1 stop17h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$94
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.
Mon 10/129:45 pm -
Nonstop2h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Southwest logo]()
$109
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:44 pm -
1 stop19h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Frontier logo]()
$113
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.
Mon 12/79:50 am -
1 stop10h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$115
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2212:17 pm -
1 stop26h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$116
This CheapOair deal was found by Cheapflights users on 9/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/612:17 pm -
1 stop26h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$117
This Frontier deal was found by Cheapflights users on 9/5. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/16:16 am -
1 stop7h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$131
This Frontier deal was found by Cheapflights users on 9/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/82:04 pm -
1 stop9h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$132
Find flight deals from Illinois to Austin
Keep the following information in mind while searching for Illinois to Austin flight deals. Data was last updated September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $156 (Kiwi.com) |
One-way from | $81 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $337 |
Good round-trip deal | $290 or less |
Good one-way deal | $180 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Austin 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 10, 2026.
Use the filters below to find and compare flights from Illinois to Austin that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Mon 10/12
6:35 pm-10:57 am
1 stop16h 22m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$87
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Tue 12/8
8:25 am-10:35 am
Nonstop2h 10m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$109
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Wed 12/9
5:51 pm-11:33 pm
1 stop5h 42m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$119
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Sat 12/5
5:31 pm-11:33 pm
1 stop6h 02m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$119
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Tue 12/8
6:00 am-12:45 pm
1 stop6h 45m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$119
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Mon 9/28
8:10 pm-7:29 pm
1 stop23h 19m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$134
Quickest round-trip
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Fri 12/4
8:25 pm-10:30 pm
Nonstop2h 05m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$135
ChicagoAustin
ORD Chicago O'Hare Intl - AUS Austin Bergstrom
ORDAUS
Chicago O'Hare Intl
Wed 11/18
12:57 pm-3:58 pm
Nonstop3h 01m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$146
ChicagoAustin
MDW Chicago Midway - AUS Austin Bergstrom
MDWAUS
Chicago Midway
Tue 11/24
6:30 am-9:20 am
Nonstop2h 50m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$146
ChicagoAustin
MDW Chicago Midway - AUS Austin Bergstrom
MDWAUS
Chicago Midway
Tue 12/8
8:55 pm-11:40 pm
Nonstop2h 45m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$146
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to Austin
Have a flexible travel schedule? Discover the best time to fly to Austin from Illinois with our price prediction graph.
STL-AUS
MLI-AUS
ORD-AUS
PIA-AUS
BMI-AUS
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Illinois to Austin
USIL-AUS
STL-AUS
MLI-AUS
ORD-AUS
PIA-AUS
What is the cheapest month to book a flight from Illinois to Austin?
Currently, January is the cheapest month in which you can book a flight from Illinois to Austin (average of $211). Flying from Illinois to Austin in July is currently the most expensive (average of $404). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from IL to AUS?
Find hourly flight availability from Illinois to Austin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 10, 2026.
Unlike in the evening, when flights are generally more expensive, you can save up to 13% on flights from Illinois to Austin by exploring options for tickets in the afternoon.
Weekly flight availability from Illinois to Austin
Explore weekly flight availability from Illinois to Austin. 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 10, 2026.
The most flights from USIL to AUS are scheduled on a Tuesday (33 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (3 on average).
How much does it cost to fly round-trip from Illinois to Austin?
Airfare is below average for this route at the moment.
Illinois to Austin flights typically cost between $288 and $408 in November.The cheapest round-trip price found within the last 5 days was $247 on Frontier (Nov 13-Nov 17).
How far ahead should I book a flight from Illinois to Austin?
The best time to book flights from Illinois to Austin is 82 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest day to fly from Illinois to Austin?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Austin. Price data was last updated on September 5, 2026.
Travelers seeking maximum savings on their Illinois to Austin flight should consider departing on Tuesday at noon 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.
Related info for your journey
Find useful and relevant information for your journey from Illinois to Austin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Austin?
Book flights to Austin if you plan to visit one of these locationsCedar Park
Round Rock
San Marcos
Bastrop
Fredericksburg
Pflugerville
Dripping Springs
Georgetown
Seguin
Canyon Lake
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for Illinois to Austin
See prices for flight routes from nearby airports that may be better suited for you.
Other flights to Austin
Explore flights to Austin departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 10, 2026.
Complete your trip
Complete your trip to Austin by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Austin by cabin class
Find flights from Illinois to Austin, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Austin flights
Browse other Illinois and Austin flight options. Last updated on September 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Illinois to Austin flights
Consider these flights traveling from Illinois to Austin.
Top 6 airlines flying from Illinois to Austin
Discover the top 6 airlines that operate flights from Illinois to Austin. 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 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$56 | Average$218 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$163 | Average$372 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$182 | Average$373 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$185 | Average$344 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$190 | Average$268 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$230 | Average$343 | FlexibilityNo cancel fee | On-timeN/A |