$98+ Cheap flights from San Antonio (SAT) 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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ORD
Dec 4 — Dec 111
Round-trip
1 adult, Economy
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Find cheap flights from San Antonio 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 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 November 4, 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 November 4, 2026.
This Trip.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 11/211:31 pm -
1 stop11h 22m
Tue 11/245:12 pm -
1 stop17h 59m
Deal found 11/2![Frontier logo]()
$316
This Trip.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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.
Tue 12/2211:48 am -
1 stop18h 01m
Sun 1/37:35 am -
1 stop27h 18m
Deal found 11/2![Frontier logo]()
$317
This Cheapflightsfares deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/78:20 pm -
1 stop28h 01m
Mon 11/95:15 pm -
1 stop28h 19m
Deal found 10/31![Frontier logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 11/248:28 pm -
2 stops19h 24m
Tue 12/17:00 am -
1 stop10h 59m
Deal found 11/1![Frontier logo]()
$319
This Frontier deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 11/211:31 pm -
1 stop11h 22m
Thu 11/265:15 am -
1 stop10h 03m
Deal found 11/3![Frontier logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 12/39:25 am -
2 stops28h 31m
Sun 12/67:00 am -
1 stop13h 02m
Deal found 10/31![Multiple Airlines logo]()
$321
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 12/1510:52 pm -
2 stops17h 41m
Sun 12/207:35 am -
1 stop27h 18m
Deal found 10/31![Frontier logo]()
$322
This Cheapflightsfares deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/267:15 pm -
1 stop10h 34m
Sun 1/37:35 am -
1 stop27h 18m
Deal found 10/31![Frontier logo]()
$324
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/308:30 pm -
1 stop27h 56m
Mon 1/45:01 am -
1 stop7h 31m
Deal found 11/4![Frontier logo]()
$329
This Booking.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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.
Wed 11/118:20 pm -
1 stop28h 01m
Sat 11/146:30 am -
1 stop12h 55m
Deal found 11/2![Frontier logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/28:03 pm -
2 stops35h 12m
Sun 12/65:24 pm -
1 stop18h 16m
Deal found 11/3![Frontier logo]()
$333
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2512:06 pm -
1 stop7h 41m
Sun 11/298:42 pm -
1 stop14h 29m
Deal found 11/4![Frontier logo]()
$338
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 November 4, 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 November 4, 2026.
This Delta deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/244:50 pm -
1 stop5h 47m
Fri 1/15:35 am -
1 stop6h 16m
Deal found 11/3![Delta logo]()
$349
This Southwest deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 1/3011:40 am -
Nonstop2h 40m
Sat 2/610:05 am -
Nonstop2h 55m
Deal found 10/30![Southwest logo]()
$379
This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 11/145:47 pm -
1 stop6h 01m
Wed 11/185:03 pm -
1 stop6h 52m
Deal found 10/30![American Airlines logo]()
$399
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 11/149:35 am -
2 stops8h 17m
Wed 11/1810:40 am -
1 stop6h 09m
Deal found 10/30![United Airlines logo]()
$404
This Alaska Airlines deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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.
Sat 2/207:35 pm -
2 stops17h 34m
Mon 2/225:55 pm -
1 stop24h 43m
Deal found 10/31![Alaska Airlines logo]()
$745
This Southwest deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/19:50 am -
Nonstop2h 30m
Tue 12/88:50 pm -
Nonstop2h 55m
Deal found 11/3![Southwest logo]()
$379
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:16 am -
1 stop5h 48m
Thu 12/175:12 pm -
1 stop7h 23m
Deal found 11/1![Delta logo]()
$399
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 11/175:30 am -
2 stops8h 23m
Sat 11/212:35 pm -
2 stops8h 16m
Deal found 11/2![United Airlines logo]()
$409
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 11/145:30 am -
2 stops11h 03m
Wed 11/186:00 am -
2 stops11h 40m
Deal found 10/30![Delta logo]()
$409
This Southwest deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 12/159:50 am -
Nonstop2h 30m
Sun 12/209:30 pm -
Nonstop3h 00m
Deal found 10/31![Southwest logo]()
$415
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Thu 11/195:34 pm -
1 stop5h 24m
Mon 11/232:35 pm -
2 stops8h 16m
Deal found 11/4![United Airlines logo]()
$425
This American Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/205:49 am -
1 stop5h 04m
Sun 1/31:46 pm -
2 stops9h 10m
Deal found 11/1![American Airlines logo]()
$479
This Southwest deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/259:50 am -
2 stops7h 25m
Tue 12/297:20 pm -
1 stop6h 05m
Deal found 11/3![Southwest logo]()
$417
This United Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 1/62:00 pm -
1 stop7h 44m
Sun 1/103:46 pm -
1 stop7h 27m
Deal found 11/3![United Airlines logo]()
$446
This American Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/245:49 am -
1 stop5h 06m
Wed 12/306:43 pm -
1 stop5h 16m
Deal found 11/3![American Airlines logo]()
$506
This Southwest deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 11/213:15 pm -
Nonstop2h 35m
Mon 11/239:30 pm -
Nonstop2h 55m
Deal found 10/30![Southwest logo]()
$424
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 1/91:14 pm -
1 stop7h 45m
Mon 1/113:46 pm -
1 stop7h 27m
Deal found 11/2![United Airlines logo]()
$446
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 11/251:44 pm -
1 stop5h 21m
Sat 11/285:30 am -
1 stop7h 09m
Deal found 11/2![Delta logo]()
$497
This Southwest deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 12/205:10 pm -
1 stop6h 40m
Mon 1/1810:05 am -
2 stops7h 40m
Deal found 10/31![Southwest logo]()
$440
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 1/92:00 pm -
1 stop7h 15m
Mon 1/115:41 pm -
1 stop5h 32m
Deal found 11/2![United Airlines logo]()
$449
This Delta deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 11/202:33 pm -
1 stop5h 06m
Wed 11/255:05 pm -
1 stop5h 49m
Deal found 11/3![Delta logo]()
$521
This Southwest deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 12/166:15 pm -
1 stop4h 25m
Sun 12/209:50 am -
2 stops7h 35m
Deal found 10/31![Southwest logo]()
$440
This American Airlines deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 12/235:49 am -
1 stop5h 04m
Sat 12/261:53 pm -
2 stops10h 06m
Deal found 10/31![American Airlines logo]()
$599
This United Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 1/271:14 pm -
1 stop7h 56m
Sat 1/3010:40 am -
2 stops10h 45m
Deal found 11/3![United Airlines logo]()
$454
This Southwest deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 11/2610:40 am -
1 stop5h 40m
Mon 11/309:30 pm -
Nonstop3h 00m
Deal found 10/30![Southwest logo]()
$448
This American Airlines deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 12/249:23 am -
1 stop5h 55m
Sun 12/271:46 pm -
1 stop6h 24m
Deal found 10/31![American Airlines logo]()
$611
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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.
Sun 4/255:00 pm -
Nonstop2h 50m
Wed 4/288:15 pm -
Nonstop2h 53m
Deal found 11/2![United Airlines logo]()
$475
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 11/256:40 am -
1 stop5h 08m
Sun 11/296:23 am -
1 stop5h 32m
Deal found 11/1![Delta logo]()
$581
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 11/256:34 am -
Nonstop2h 58m
Sat 11/289:00 am -
Nonstop3h 08m
Deal found 11/2![United Airlines logo]()
$477
This American Airlines deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 12/244:20 pm -
1 stop5h 40m
Sun 12/276:43 pm -
1 stop5h 16m
Deal found 10/31![American Airlines logo]()
$646
Last-minute flights from San Antonio to IllinoisDiscover last-minute flight deals from San Antonio to Illinois. Data last updated November 4, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Illinois. Data last updated November 4, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/78:20 pm -
1 stop28h 01m
Mon 11/95:15 pm -
1 stop28h 19m
Deal found 10/31![Frontier logo]()
$318
This Booking.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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.
Wed 11/118:20 pm -
1 stop28h 01m
Sat 11/146:30 am -
1 stop12h 55m
Deal found 11/2![Frontier logo]()
$332
This Trip.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 11/211:31 pm -
1 stop11h 22m
Tue 11/245:12 pm -
1 stop17h 59m
Deal found 11/2![Frontier logo]()
$316
This Frontier deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 11/211:31 pm -
1 stop11h 22m
Thu 11/265:15 am -
1 stop10h 03m
Deal found 11/3![Frontier logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 11/248:28 pm -
2 stops19h 24m
Tue 12/17:00 am -
1 stop10h 59m
Deal found 11/1![Frontier logo]()
$319
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2512:06 pm -
1 stop7h 41m
Sun 11/298:42 pm -
1 stop14h 29m
Deal found 11/4![Frontier logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/28:03 pm -
2 stops35h 12m
Sun 12/65:24 pm -
1 stop18h 16m
Deal found 11/3![Frontier logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 12/39:25 am -
2 stops28h 31m
Sun 12/67:00 am -
1 stop13h 02m
Deal found 10/31![Multiple Airlines logo]()
$321
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 12/1510:52 pm -
2 stops17h 41m
Sun 12/207:35 am -
1 stop27h 18m
Deal found 10/31![Frontier logo]()
$322
This Trip.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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.
Tue 12/2211:48 am -
1 stop18h 01m
Sun 1/37:35 am -
1 stop27h 18m
Deal found 11/2![Frontier logo]()
$317
This Cheapflightsfares deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/267:15 pm -
1 stop10h 34m
Sun 1/37:35 am -
1 stop27h 18m
Deal found 10/31![Frontier logo]()
$324
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/308:30 pm -
1 stop27h 56m
Mon 1/45:01 am -
1 stop7h 31m
Deal found 11/4![Frontier logo]()
$329
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 November 4, 2026.
Search for one-way flight options from San Antonio to Illinois. Find affordable one-way fares based on user searches. Data last updated November 4, 2026.
This Super.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 12/18:03 pm -
1 stop8h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$98
This Frontier deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 11/2512:06 pm -
1 stop7h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$100
This Cheapflightsfares deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2512:06 pm -
1 stop12h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$104
This Trip.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 12/21:32 pm -
1 stop25h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$114
This Cheapflightsfares deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2011:55 am -
1 stop13h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$124
This Super.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/48:41 pm -
1 stop28h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$137
This Priceline deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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.
Mon 1/2511:55 am -
1 stop7h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$140
This Super.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/2511:55 am -
1 stop28h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$143
This Super.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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.
Wed 11/118:20 pm -
1 stop28h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Frontier logo]()
$144
This Frontier deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 11/3012:06 pm -
1 stop12h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Frontier logo]()
$145
This Booking.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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.
Wed 12/231:27 pm -
1 stop27h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$147
This Priceline deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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.
Mon 1/41:27 pm -
1 stop11h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Frontier logo]()
$155
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 November 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $316 (Trip.com) |
One-way from | $98 (Super.com) |
Popular in | October |
Cheapest in | February |
Average price | $411 |
Good round-trip deal | $362 or less |
Good one-way deal | $235 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 7,457,451 searches. Data last updated November 4, 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 - ORD Chicago O'Hare Intl
SATORD
San Antonio
Thu 12/3
9:25 am-1:56 pm
2 stops28h 31m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$159
San AntonioChicago
SAT San Antonio - ORD Chicago O'Hare Intl
SATORD
San Antonio
Tue 2/23
8:22 pm-12:26 am
1 stop28h 04m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$170
San AntonioChicago
SAT San Antonio - ORD Chicago O'Hare Intl
SATORD
San Antonio
Mon 12/21
5:39 pm-8:40 pm
Nonstop3h 01m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$190
Quickest round-trip
San AntonioChicago
SAT San Antonio - MDW Chicago Midway
SATMDW
San Antonio
Fri 12/4
2:40 pm-5:20 pm
Nonstop2h 40m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$190
San AntonioChicago
SAT San Antonio - MDW Chicago Midway
SATMDW
San Antonio
Tue 12/1
2:40 pm-5:20 pm
Nonstop2h 40m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$190
San AntonioChicago
SAT San Antonio - MDW Chicago Midway
SATMDW
San Antonio
Fri 12/4
5:25 am-1:01 pm
1 stop7h 36m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$200
San AntonioChicago
SAT San Antonio - ORD Chicago O'Hare Intl
SATORD
San Antonio
Thu 11/26
9:35 am-4:29 pm
1 stop6h 54m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$200
San AntonioChicago
SAT San Antonio - MDW Chicago Midway
SATMDW
San Antonio
Mon 12/21
8:45 pm-1:00 am
1 stop4h 15m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$200
San AntonioChicago
SAT San Antonio - MDW Chicago Midway
SATMDW
San Antonio
Thu 11/26
1:30 pm-5:55 pm
1 stop4h 25m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$200
San AntonioChicago
SAT San Antonio - MDW Chicago Midway
SATMDW
San Antonio
Wed 12/30
5:40 pm-12:20 am
1 stop6h 40m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$200
Showing 1-10 of 55 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-ORD
SAT-MDW
SAT-MLI
SAT-PIA
SAT-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 San Antonio to Illinois
SAT-USIL
SAT-ORD
SAT-MDW
SAT-MLI
SAT-PIA
What is the cheapest month to book a flight from San Antonio to Illinois?
Currently, February is the cheapest month in which you can book a flight from San Antonio to Illinois (average of $356). Flying from San Antonio to Illinois in October is currently the most expensive (average of $444). 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 November 4, 2026.
It’s optimal to fly from San Antonio to Illinois in the morning. By choosing this option you can save up to 26% 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 November 4, 2026.
The most flights from SAT to USIL are scheduled on a Monday (21 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (13 on average).
How much does it cost to fly round-trip from San Antonio to Illinois?
Airfare is below average for this route at the moment.
San Antonio to Illinois flights typically cost between $362 and $515 in November.The cheapest round-trip price found within the last 5 days was $316 on Frontier (Nov 21-Nov 24).
How far ahead should I book a flight from San Antonio to Illinois?
Booking 51 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 November 4, 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.
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
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
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Antonio to Illinois by cabin class
Find flights from San Antonio to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Antonio and Illinois flights
Browse other San Antonio and Illinois flight options. Last updated on November 4, 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 7,457,451 searches. Data last updated November 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$131 | Average$297 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$237 | Average$450 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$277 | Average$461 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$306 | Average$328 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$315 | Average$475 | FlexibilityNo cancel fee | On-time63% |