$78+ Cheap flights from San Antonio (SAT) 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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ORD
Sep 12 — Sep 191
Round-trip
1 adult, Economy
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Cheapest flights from San Antonio to IllinoisExplore the most affordable flight options available from San Antonio to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 13, 2026.
Explore the most affordable flight options available from San Antonio to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 13, 2026.
This Trip.com deal was found by Cheapflights users on 8/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/163:19 pm -
1 stop19h 58m
Thu 9/175:19 pm -
1 stop15h 51m
Deal found 8/12![Frontier logo]()
$184
This Trip.com deal was found by Cheapflights users on 8/11. 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.
Mon 9/2110:05 am -
1 stop6h 29m
Wed 9/238:10 pm -
1 stop23h 15m
Deal found 8/11![Frontier logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 8/10. 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.
Tue 10/68:20 pm -
1 stop22h 57m
Tue 10/138:10 pm -
1 stop15h 11m
Deal found 8/10![Frontier logo]()
$261
This American Airlines deal was found by Cheapflights users on 8/11. 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 9/197:28 am -
1 stop5h 48m
Tue 9/225:18 pm -
1 stop6h 37m
Deal found 8/11![American Airlines logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 8/10. 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.
Tue 10/68:20 pm -
1 stop22h 57m
Mon 10/1210:35 am -
2 stops47h 04m
Deal found 8/10![Frontier logo]()
$266
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 11/57:56 pm -
1 stop23h 19m
Sun 11/88:10 pm -
1 stop14h 02m
Deal found 8/10![Frontier logo]()
$267
This Southwest deal was found by Cheapflights users on 8/9. 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 9/213:30 pm -
Nonstop2h 10m
Sat 9/262:25 pm -
Nonstop2h 05m
Deal found 8/9![Southwest logo]()
$268
This Kiwi.com deal was found by Cheapflights users on 8/10. 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.
Wed 10/710:03 am -
2 stops23h 37m
Wed 10/148:10 pm -
1 stop15h 11m
Deal found 8/10![Frontier logo]()
$272
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 10/83:10 pm -
1 stop28h 05m
Wed 10/148:10 pm -
1 stop15h 11m
Deal found 8/10![Frontier logo]()
$273
This Super.com deal was found by Cheapflights users on 8/9. 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 9/189:50 pm -
1 stop7h 48m
Mon 9/218:55 pm -
1 stop17h 25m
Deal found 8/9![Frontier logo]()
$274
This Trip.com deal was found by Cheapflights users on 8/10. 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.
Mon 9/149:50 pm -
1 stop7h 48m
Mon 9/288:55 pm -
1 stop17h 25m
Deal found 8/10![Frontier logo]()
$275
This Trip.com deal was found by Cheapflights users on 8/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:51 am -
1 stop6h 20m
Sat 9/1912:17 pm -
1 stop23h 27m
Deal found 8/8![Frontier logo]()
$276
Best flights from San Antonio to IllinoisDiscover carefully curated flight deals from San Antonio to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 13, 2026.
Discover carefully curated flight deals from San Antonio to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 13, 2026.
This Southwest deal was found by Cheapflights users on 8/10. 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.
Mon 9/75:00 am -
Nonstop2h 35m
Thu 9/104:45 pm -
1 stop5h 45m
Deal found 8/10![Southwest logo]()
$294
This American Airlines deal was found by Cheapflights users on 8/9. 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.
Tue 9/82:45 pm -
2 stops9h 23m
Tue 9/154:57 pm -
1 stop6h 58m
Deal found 8/9![American Airlines logo]()
$308
This United Airlines deal was found by Cheapflights users on 8/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:30 am -
1 stop6h 01m
Sun 9/276:32 am -
1 stop5h 39m
Deal found 8/9![United Airlines logo]()
$316
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:55 am -
1 stop8h 27m
Wed 9/211:08 am -
2 stops11h 26m
Deal found 8/12![Delta logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 9/109:25 am -
2 stops23h 27m
Sun 9/139:29 pm -
1 stop14h 15m
Deal found 8/10![Multiple Airlines logo]()
$428
This Southwest deal was found by Cheapflights users on 8/10. 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.
Thu 9/107:20 am -
Nonstop2h 05m
Thu 9/175:45 am -
1 stop4h 50m
Deal found 8/10![Southwest logo]()
$311
This United Airlines deal was found by Cheapflights users on 8/10. 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 9/1211:34 am -
2 stops9h 25m
Sat 9/266:15 am -
1 stop5h 51m
Deal found 8/10![United Airlines logo]()
$334
This Southwest deal was found by Cheapflights users on 8/10. 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.
Mon 10/126:45 pm -
1 stop5h 30m
Mon 10/199:20 pm -
Nonstop2h 45m
Deal found 8/10![Southwest logo]()
$318
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Fri 9/46:52 pm -
1 stop5h 22m
Mon 9/75:42 am -
1 stop4h 19m
Deal found 8/12![American Airlines logo]()
$359
This United Airlines deal was found by Cheapflights users on 8/11. 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.
Sat 10/314:48 pm -
1 stop7h 11m
Wed 11/49:00 am -
Nonstop3h 08m
Deal found 8/11![United Airlines logo]()
$337
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:55 am -
1 stop8h 27m
Sun 8/305:09 pm -
1 stop7h 19m
Deal found 8/12![Delta logo]()
$379
This Southwest deal was found by Cheapflights users on 8/9. 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 9/143:30 pm -
1 stop3h 50m
Mon 9/285:25 am -
1 stop5h 45m
Deal found 8/9![Southwest logo]()
$323
This American Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:48 pm -
1 stop5h 39m
Sun 10/45:10 pm -
1 stop6h 45m
Deal found 8/13![American Airlines logo]()
$377
This United Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/295:30 am -
2 stops9h 00m
Mon 11/21:40 pm -
1 stop7h 13m
Deal found 8/11![United Airlines logo]()
$348
This Southwest deal was found by Cheapflights users on 8/8. 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 9/57:20 am -
Nonstop2h 05m
Sat 9/192:25 pm -
Nonstop2h 05m
Deal found 8/8![Southwest logo]()
$327
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/259:27 am -
2 stops8h 48m
Sat 8/293:02 pm -
2 stops6h 58m
Deal found 8/10![American Airlines logo]()
$389
This Delta deal was found by Cheapflights users on 8/9. 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.
Sun 10/115:15 am -
1 stop5h 15m
Tue 10/135:29 pm -
1 stop5h 38m
Deal found 8/9![Delta logo]()
$435
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Thu 10/88:21 pm -
2 stops15h 06m
Sun 10/119:33 pm -
1 stop14h 42m
Deal found 8/12![Multiple Airlines logo]()
$480
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/167:25 am -
1 stop4h 40m
Sat 12/199:40 pm -
Nonstop2h 50m
Deal found 8/12![Southwest logo]()
$328
This United Airlines deal was found by Cheapflights users on 8/8. 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 9/226:30 am -
Nonstop3h 00m
Tue 9/291:30 pm -
Nonstop3h 01m
Deal found 8/8![United Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 8/8. 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 9/511:10 am -
Nonstop2h 35m
Sun 9/68:40 pm -
Nonstop2h 40m
Deal found 8/8![Southwest logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 8/11. 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.
Sat 9/198:20 pm -
2 stops24h 19m
Thu 9/249:29 pm -
1 stop14h 15m
Deal found 8/11![Multiple Airlines logo]()
$501
This United Airlines deal was found by Cheapflights users on 8/10. 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 10/102:00 pm -
Nonstop3h 00m
Tue 10/139:05 am -
Nonstop3h 06m
Deal found 8/10![United Airlines logo]()
$377
This American Airlines deal was found by Cheapflights users on 8/9. 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 9/102:50 pm -
1 stop6h 06m
Sun 9/136:41 pm -
1 stop5h 14m
Deal found 8/9![American Airlines logo]()
$430
This United Airlines deal was found by Cheapflights users on 8/8. 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 9/242:00 pm -
Nonstop3h 00m
Sat 9/269:00 am -
Nonstop3h 06m
Deal found 8/8![United Airlines logo]()
$377
This Kiwi.com deal was found by Cheapflights users on 8/9. 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 9/2412:39 pm -
1 stop8h 00m
Sun 9/279:29 pm -
2 stops21h 56m
Deal found 8/9![Multiple Airlines logo]()
$502
This Southwest deal was found by Cheapflights users on 8/8. 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 10/133:35 pm -
Nonstop2h 05m
Sun 10/189:45 pm -
Nonstop2h 10m
Deal found 8/8![Southwest logo]()
$357
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:10 am -
1 stop6h 47m
Sun 10/183:58 pm -
1 stop5h 09m
Deal found 8/10![American Airlines logo]()
$432
This United Airlines deal was found by Cheapflights users on 8/10. 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.
Tue 8/251:45 pm -
1 stop7h 05m
Sat 8/298:45 am -
1 stop8h 08m
Deal found 8/10![United Airlines logo]()
$379
This American Airlines deal was found by Cheapflights users on 8/11. 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.
Fri 9/46:52 pm -
1 stop5h 07m
Mon 9/141:19 pm -
2 stops9h 31m
Deal found 8/11![American Airlines logo]()
$432
Last-minute flights from San Antonio to IllinoisDiscover last-minute flight deals from San Antonio to Illinois. Data last updated August 13, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Illinois. Data last updated August 13, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 8/9. 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 8/249:51 am -
1 stop13h 17m
Tue 9/226:30 am -
1 stop12h 55m
Deal found 8/9![Frontier logo]()
$279
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/25:59 pm -
1 stop5h 27m
Tue 9/85:53 pm -
1 stop4h 51m
Deal found 8/12![United Airlines logo]()
$277
This Trip.com deal was found by Cheapflights users on 8/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:51 am -
1 stop6h 20m
Sat 9/1912:17 pm -
1 stop23h 27m
Deal found 8/8![Frontier logo]()
$276
This Southwest deal was found by Cheapflights users on 8/9. 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 9/610:05 am -
Nonstop2h 35m
Sat 9/126:50 am -
1 stop7h 45m
Deal found 8/9![Southwest logo]()
$278
This Trip.com deal was found by Cheapflights users on 8/10. 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.
Mon 9/149:50 pm -
1 stop7h 48m
Mon 9/288:55 pm -
1 stop17h 25m
Deal found 8/10![Frontier logo]()
$275
This Trip.com deal was found by Cheapflights users on 8/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/163:19 pm -
1 stop19h 58m
Thu 9/175:19 pm -
1 stop15h 51m
Deal found 8/12![Frontier logo]()
$184
This Super.com deal was found by Cheapflights users on 8/9. 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 9/189:50 pm -
1 stop7h 48m
Mon 9/218:55 pm -
1 stop17h 25m
Deal found 8/9![Frontier logo]()
$274
This American Airlines deal was found by Cheapflights users on 8/11. 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 9/197:28 am -
1 stop5h 48m
Tue 9/225:18 pm -
1 stop6h 37m
Deal found 8/11![American Airlines logo]()
$263
This Super.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2012:39 pm -
1 stop16h 59m
Fri 9/258:55 pm -
1 stop16h 53m
Deal found 8/12![Frontier logo]()
$280
This Trip.com deal was found by Cheapflights users on 8/11. 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.
Mon 9/2110:05 am -
1 stop6h 29m
Wed 9/238:10 pm -
1 stop23h 15m
Deal found 8/11![Frontier logo]()
$205
This Southwest deal was found by Cheapflights users on 8/9. 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 9/213:30 pm -
Nonstop2h 10m
Sat 9/262:25 pm -
Nonstop2h 05m
Deal found 8/9![Southwest logo]()
$268
This Frontier deal was found by Cheapflights users on 8/9. 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 9/303:19 pm -
1 stop14h 19m
Sun 10/48:55 pm -
1 stop14h 49m
Deal found 8/9![Frontier logo]()
$278
One-way flights from San Antonio to IllinoisSearch for one-way flight options from San Antonio to Illinois. Find affordable one-way fares based on user searches. Data last updated August 13, 2026.
Search for one-way flight options from San Antonio to Illinois. Find affordable one-way fares based on user searches. Data last updated August 13, 2026.
This Super.com deal was found by Cheapflights users on 8/11. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/77:48 pm -
1 stop9h 47m
Deal found 8/11![Frontier logo]()
$78
This Frontier deal was found by Cheapflights users on 8/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/99:51 pm -
1 stop7h 44m
Deal found 8/11![Frontier logo]()
$79
This Frontier deal was found by Cheapflights users on 8/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:16 pm -
1 stop6h 59m
Deal found 8/11![Frontier logo]()
$82
This Expedia deal was found by Cheapflights users on 8/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:51 am -
1 stop6h 20m
Deal found 8/12![Frontier logo]()
$83
This Super.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/122:47 pm -
1 stop14h 51m
Deal found 8/12![Frontier logo]()
$84
This Frontier deal was found by Cheapflights users on 8/10. 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.
Wed 9/910:03 am -
1 stop12h 56m
Deal found 8/10![Frontier logo]()
$85
This Frontier deal was found by Cheapflights users on 8/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1212:43 pm -
1 stop12h 34m
Deal found 8/11![Frontier logo]()
$88
This Frontier deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1510:34 pm -
1 stop14h 01m
Deal found 8/13![Frontier logo]()
$89
This CheapOair deal was found by Cheapflights users on 8/10. 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.
Thu 9/108:20 pm -
1 stop28h 03m
Deal found 8/10![Frontier logo]()
$90
This Jetabroad deal was found by Cheapflights users on 8/12. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/163:19 pm -
1 stop19h 58m
Deal found 8/12![Frontier logo]()
$91
This Trip.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/128:20 pm -
1 stop15h 47m
Deal found 8/13![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:20 pm -
1 stop28h 03m
Deal found 8/12![Frontier logo]()
$108
Find flight deals from San Antonio to Illinois
Keep the following information in mind while searching for San Antonio to Illinois flight deals. Data was last updated August 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $184 (Trip.com) |
One-way from | $78 (Super.com) |
Popular in | June |
Cheapest in | September |
Average price | $381 |
Good round-trip deal | $338 or less |
Good one-way deal | $256 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from San Antonio 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 August 13, 2026.
Use the filters below to find and compare flights from San Antonio to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San AntonioChicago
SAT San Antonio - MDW Chicago Midway
SATMDW
San Antonio
Mon 9/7
5:00 am-7:35 am
Nonstop2h 35m
Chicago Midway
Thu 9/10
4:45 pm-10:30 pm
1 stop5h 45m
$294
San AntonioMoline
SAT San Antonio - MLI Moline Quad-City
SATMLI
San Antonio
Tue 9/8
2:45 pm-12:08 am
2 stops9h 23m
Moline Quad-City
Tue 9/15
4:57 pm-11:55 pm
1 stop6h 58m
$308
San AntonioSt. Louis
SAT San Antonio - STL Lambert-St Louis
SATSTL
San Antonio
Thu 9/10
7:20 am-9:25 am
Nonstop2h 05m
Lambert-St Louis
Thu 9/17
5:45 am-10:35 am
1 stop4h 50m
$311
San AntonioMoline
SAT San Antonio - MLI Moline Quad-City
SATMLI
San Antonio
Tue 9/22
6:30 am-12:31 pm
1 stop6h 01m
Moline Quad-City
Sun 9/27
6:32 am-12:11 pm
1 stop5h 39m
$316
San AntonioChicago
SAT San Antonio - MDW Chicago Midway
SATMDW
San Antonio
Mon 10/12
6:45 pm-12:15 am
1 stop5h 30m
Chicago Midway
Mon 10/19
9:20 pm-12:05 am
Nonstop2h 45m
$318
San AntonioChicago
SAT San Antonio - MDW Chicago Midway
SATMDW
San Antonio
Mon 9/14
3:30 pm-7:20 pm
1 stop3h 50m
Chicago Midway
Mon 9/28
5:25 am-11:10 am
1 stop5h 45m
$323
Quickest round-trip
San AntonioSt. Louis
SAT San Antonio - STL Lambert-St Louis
SATSTL
San Antonio
Sat 9/5
7:20 am-9:25 am
Nonstop2h 05m
Lambert-St Louis
Sat 9/19
2:25 pm-4:30 pm
Nonstop2h 05m
$327
San AntonioChicago
SAT San Antonio - MDW Chicago Midway
SATMDW
San Antonio
Wed 12/16
7:25 am-12:05 pm
1 stop4h 40m
Chicago Midway
Sat 12/19
9:40 pm-12:30 am
Nonstop2h 50m
$328
San AntonioPeoria
SAT San Antonio - PIA Greater Peoria
SATPIA
San Antonio
Sat 9/12
11:34 am-8:59 pm
2 stops9h 25m
Greater Peoria
Sat 9/26
6:15 am-12:06 pm
1 stop5h 51m
$334
San AntonioChicago
SAT San Antonio - ORD Chicago O'Hare Intl
SATORD
San Antonio
Sat 10/31
4:48 pm-11:59 pm
1 stop7h 11m
Chicago O'Hare Intl
Wed 11/4
9:00 am-12:08 pm
Nonstop3h 08m
$337
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from San Antonio to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from San Antonio with our price prediction graph.
SAT-STL
SAT-ORD
SAT-MDW
SAT-EVV
SAT-MLI
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 San Antonio to Illinois
SAT-USIL
SAT-STL
SAT-ORD
SAT-MDW
SAT-EVV
What is the cheapest month to book a flight from San Antonio to Illinois?
Currently, September is the cheapest month in which you can book a flight from San Antonio to Illinois (average of $346). Flying from San Antonio to Illinois in June is currently the most expensive (average of $439). 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 SAT to IL?
Find hourly flight availability from San Antonio 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 August 13, 2026.
It’s optimal to fly from San Antonio to Illinois in the morning. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight at noon.
Weekly flight availability from San Antonio to Illinois
Explore weekly flight availability from San Antonio 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 August 13, 2026.
The most flights from SAT to USIL are scheduled on a Tuesday (24 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).
How much does it cost to fly round-trip from San Antonio to Illinois?
Airfare is typical for this route at the moment.
San Antonio to Illinois flights typically cost between $260 and $426 in September.The cheapest round-trip price found within the last 5 days was $274 on Frontier (Sep 18-Sep 21).
How far ahead should I book a flight from San Antonio to Illinois?
Booking 69 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Antonio to Illinois. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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 August 13, 2026.
Read through reviews of airlines operating flights from San Antonio to Illinois, such as Southwest,Delta, andUnited Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from San Antonio 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 San Antonio to Illinois
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Complete your trip
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San Antonio and Illinois flights
Browse other San Antonio and Illinois flight options. Last updated on August 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
San Antonio to Illinois flights
Consider these flights traveling from San Antonio to Illinois.
Top 5 airlines flying from San Antonio to Illinois
Discover the top 5 airlines that operate flights from San Antonio 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 August 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$96 | Average$232 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$257 | Average$440 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$281 | Average$459 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$287 | Average$438 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$306 | Average$323 | FlexibilityNo cancel fee | On-timeN/A |