$122+ Cheap flights from San Francisco (SFO) 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 12/20. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ORD
Nov 8 — Nov 151
Round-trip
1 adult, Economy
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Find cheap flights from San Francisco to Illinois with Cheapflights
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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 Francisco to IllinoisExplore the most affordable flight options available from San Francisco to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 9, 2026.
Explore the most affordable flight options available from San Francisco to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 9, 2026.
This Southwest deal was found by Cheapflights users on 10/6. 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 10/286:50 pm -
2 stops8h 50m
Sat 10/3112:50 pm -
2 stops7h 25m
Deal found 10/6![Southwest logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:00 pm -
1 stop10h 24m
Wed 11/116:30 am -
2 stops16h 02m
Deal found 10/6![Frontier logo]()
$262
This American Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2610:39 am -
1 stop11h 34m
Wed 12/28:56 pm -
Nonstop5h 11m
Deal found 10/7![American Airlines logo]()
$263
This United Airlines deal was found by Cheapflights users on 10/8. 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.
Fri 11/62:00 pm -
Nonstop4h 22m
Mon 11/96:00 am -
Nonstop4h 44m
Deal found 10/8![United Airlines logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:59 pm -
1 stop9h 23m
Fri 10/3012:20 pm -
1 stop12h 09m
Deal found 10/5![Frontier logo]()
$265
This Mytrip deal was found by Cheapflights users on 10/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:59 pm -
1 stop7h 36m
Mon 11/28:30 pm -
2 stops19h 50m
Deal found 10/6![Frontier logo]()
$265
This Expedia deal was found by Cheapflights users on 10/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/22:44 pm -
1 stop7h 05m
Mon 11/95:15 pm -
1 stop17h 04m
Deal found 10/5![Multiple Airlines logo]()
$266
This Southwest deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:00 am -
2 stops7h 10m
Sat 10/3112:50 pm -
2 stops7h 25m
Deal found 10/8![Southwest logo]()
$267
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:25 pm -
1 stop9h 09m
Tue 11/104:36 pm -
2 stops17h 43m
Deal found 10/6![Frontier logo]()
$267
This Frontier deal was found by Cheapflights users on 10/5. 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.
Tue 10/2011:59 pm -
1 stop12h 36m
Fri 11/612:20 pm -
1 stop12h 44m
Deal found 10/5![Frontier logo]()
$268
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2412:00 pm -
1 stop10h 24m
Tue 11/104:36 pm -
2 stops17h 43m
Deal found 10/6![Frontier logo]()
$268
This Cheapflightsfares deal was found by Cheapflights users on 10/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:19 pm -
1 stop28h 57m
Mon 10/263:30 pm -
1 stop18h 49m
Deal found 10/8![Frontier logo]()
$269
Best flights from San Francisco to IllinoisDiscover carefully curated flight deals from San Francisco to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 9, 2026.
Discover carefully curated flight deals from San Francisco to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 9, 2026.
This Alaska Airlines deal was found by Cheapflights users on 10/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/119:58 am -
2 stops12h 01m
Wed 12/166:00 am -
1 stop10h 12m
Deal found 10/8![Alaska Airlines logo]()
$269
This Southwest deal was found by Cheapflights users on 10/8. 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.
Fri 12/182:15 pm -
1 stop7h 05m
Wed 12/237:35 am -
1 stop6h 45m
Deal found 10/8![Southwest logo]()
$310
This KAYAK deal was found by Cheapflights users on 10/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/162:12 pm -
1 stop7h 47m
Wed 11/187:17 pm -
1 stop6h 42m
Deal found 10/8![Delta logo]()
$345
This United Airlines deal was found by Cheapflights users on 10/4. 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 12/155:00 am -
Nonstop4h 26m
Thu 12/244:35 pm -
Nonstop5h 01m
Deal found 10/4![United Airlines logo]()
$364
This American Airlines deal was found by Cheapflights users on 10/4. 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 11/133:04 pm -
1 stop6h 55m
Sun 11/155:00 am -
1 stop6h 40m
Deal found 10/4![American Airlines logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:30 pm -
1 stop15h 06m
Fri 11/277:42 pm -
2 stops23h 35m
Deal found 10/6![Multiple Airlines logo]()
$604
This Southwest deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/511:35 pm -
Nonstop4h 25m
Tue 11/109:05 pm -
Nonstop4h 50m
Deal found 10/8![Southwest logo]()
$326
This Southwest deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/81:05 pm -
1 stop6h 50m
Wed 12/910:00 am -
Nonstop4h 50m
Deal found 10/7![Southwest logo]()
$340
This Delta deal was found by Cheapflights users on 10/5. 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.
Fri 10/3011:30 pm -
1 stop10h 21m
Tue 11/31:30 pm -
1 stop8h 36m
Deal found 10/5![Delta logo]()
$379
This American Airlines deal was found by Cheapflights users on 10/6. 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 11/63:04 pm -
1 stop6h 59m
Sun 11/85:37 pm -
1 stop8h 18m
Deal found 10/6![American Airlines logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 10/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/133:38 pm -
2 stops12h 02m
Sun 11/152:15 pm -
1 stop20h 37m
Deal found 10/8![Alaska Airlines logo]()
$382
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/264:10 pm -
Nonstop4h 19m
Mon 11/26:00 am -
Nonstop4h 44m
Deal found 10/7![United Airlines logo]()
$386
This Delta deal was found by Cheapflights users on 10/5. 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.
Fri 11/1311:59 pm -
1 stop9h 27m
Tue 11/174:28 pm -
1 stop8h 21m
Deal found 10/5![Delta logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 10/4. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/208:25 am -
1 stop9h 38m
Mon 11/233:19 pm -
1 stop9h 27m
Deal found 10/4![Alaska Airlines logo]()
$383
This Southwest deal was found by Cheapflights users on 10/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1311:35 pm -
Nonstop4h 25m
Sun 11/159:30 pm -
Nonstop4h 55m
Deal found 10/5![Southwest logo]()
$375
This American Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1411:20 am -
1 stop8h 42m
Tue 11/172:32 pm -
1 stop9h 59m
Deal found 10/5![American Airlines logo]()
$430
This KAYAK deal was found by Cheapflights users on 10/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/158:45 pm -
Nonstop4h 17m
Wed 11/184:35 pm -
Nonstop4h 53m
Deal found 10/8![United Airlines logo]()
$438
This Delta deal was found by Cheapflights users on 10/7. 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.
Fri 11/138:50 pm -
2 stops12h 36m
Sun 11/154:28 pm -
1 stop8h 21m
Deal found 10/7![Delta logo]()
$414
This Southwest deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals ”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:10 am -
2 stops8h 55m
Wed 11/2510:25 pm -
Nonstop4h 55m
Deal found 10/4![Southwest logo]()
$380
This American Airlines deal was found by Cheapflights users on 10/6. 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.
Tue 11/1712:05 pm -
2 stops9h 43m
Sat 11/215:13 pm -
1 stop9h 34m
Deal found 10/6![American Airlines logo]()
$442
This United Airlines deal was found by Cheapflights users on 10/6. 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.
Wed 12/235:00 am -
Nonstop4h 28m
Wed 12/307:37 am -
Nonstop5h 03m
Deal found 10/6![United Airlines logo]()
$452
This Southwest deal was found by Cheapflights users on 10/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/316:00 am -
Nonstop4h 15m
Mon 1/45:20 pm -
2 stops8h 00m
Deal found 10/5![Southwest logo]()
$388
This Delta deal was found by Cheapflights users on 10/5. 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.
Fri 11/137:05 am -
2 stops13h 26m
Wed 11/184:28 pm -
1 stop8h 21m
Deal found 10/5![Delta logo]()
$434
This Kiwi.com deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/248:34 pm -
2 stops20h 47m
Tue 12/2912:22 pm -
1 stop20h 24m
Deal found 10/7![Multiple Airlines logo]()
$613
This KAYAK deal was found by Cheapflights users on 10/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/156:17 am -
1 stop8h 30m
Wed 11/185:55 pm -
1 stop7h 38m
Deal found 10/8![Delta logo]()
$438
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/201:03 am -
1 stop7h 02m
Sat 11/289:25 pm -
1 stop6h 22m
Deal found 10/7![United Airlines logo]()
$491
This Southwest deal was found by Cheapflights users on 10/7. 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 11/59:05 am -
2 stops9h 30m
Thu 11/125:20 pm -
2 stops8h 05m
Deal found 10/7![Southwest logo]()
$413
This American Airlines deal was found by Cheapflights users on 10/4. 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.
Mon 12/282:12 pm -
1 stop8h 04m
Fri 1/15:00 am -
1 stop8h 05m
Deal found 10/4![American Airlines logo]()
$521
This Delta deal was found by Cheapflights users on 10/8. 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 11/2411:35 pm -
1 stop7h 15m
Tue 12/15:30 pm -
1 stop8h 40m
Deal found 10/8![Delta logo]()
$442
This United Airlines deal was found by Cheapflights users on 10/4. 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.
Fri 11/1311:30 pm -
1 stop8h 38m
Sun 11/155:35 pm -
1 stop9h 18m
Deal found 10/4![United Airlines logo]()
$499
Last-minute flights from San Francisco to IllinoisDiscover last-minute flight deals from San Francisco to Illinois. Data last updated October 9, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Illinois. Data last updated October 9, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:25 pm -
1 stop9h 09m
Tue 11/104:36 pm -
2 stops17h 43m
Deal found 10/6![Frontier logo]()
$267
This Frontier deal was found by Cheapflights users on 10/5. 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.
Tue 10/2011:59 pm -
1 stop12h 36m
Fri 11/612:20 pm -
1 stop12h 44m
Deal found 10/5![Frontier logo]()
$268
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:00 pm -
1 stop10h 24m
Wed 11/116:30 am -
2 stops16h 02m
Deal found 10/6![Frontier logo]()
$262
This Cheapflightsfares deal was found by Cheapflights users on 10/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/222:17 pm -
1 stop12h 59m
Mon 10/263:30 pm -
1 stop24h 50m
Deal found 10/8![Frontier logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:59 pm -
1 stop9h 23m
Fri 10/3012:20 pm -
1 stop12h 09m
Deal found 10/5![Frontier logo]()
$265
This Mytrip deal was found by Cheapflights users on 10/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:59 pm -
1 stop7h 36m
Mon 11/28:30 pm -
2 stops19h 50m
Deal found 10/6![Frontier logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:02 am -
2 stops10h 43m
Tue 11/36:30 am -
1 stop6h 47m
Deal found 10/9![Frontier logo]()
$268
This Southwest deal was found by Cheapflights users on 10/6. 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 10/286:50 pm -
2 stops8h 50m
Sat 10/3112:50 pm -
2 stops7h 25m
Deal found 10/6![Southwest logo]()
$262
This Southwest deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:00 am -
2 stops7h 10m
Sat 10/3112:50 pm -
2 stops7h 25m
Deal found 10/8![Southwest logo]()
$267
This Expedia deal was found by Cheapflights users on 10/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/22:44 pm -
1 stop7h 05m
Mon 11/95:15 pm -
1 stop17h 04m
Deal found 10/5![Multiple Airlines logo]()
$266
This United Airlines deal was found by Cheapflights users on 10/8. 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.
Fri 11/62:00 pm -
Nonstop4h 22m
Mon 11/96:00 am -
Nonstop4h 44m
Deal found 10/8![United Airlines logo]()
$264
This American Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2610:39 am -
1 stop11h 34m
Wed 12/28:56 pm -
Nonstop5h 11m
Deal found 10/7![American Airlines logo]()
$263
One-way flights from San Francisco to IllinoisSearch for one-way flight options from San Francisco to Illinois. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.
Search for one-way flight options from San Francisco to Illinois. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.
This Super.com deal was found by Cheapflights users on 10/4. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/208:45 pm -
1 stop7h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Frontier logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/910:23 pm -
2 stops34h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/92:21 pm -
2 stops32h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1610:23 pm -
2 stops34h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Frontier logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/26:30 pm -
2 stops23h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Frontier logo]()
$124
This Trip.com deal was found by Cheapflights users on 10/8. 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.
Wed 12/210:46 pm -
1 stop14h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Frontier logo]()
$125
This Cheapflightsfares deal was found by Cheapflights users on 10/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:00 am -
1 stop16h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Frontier logo]()
$125
This Delta deal was found by Cheapflights users on 10/8. 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.
Mon 10/2610:55 pm -
1 stop8h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Delta logo]()
$126
This Delta deal was found by Cheapflights users on 10/8. 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.
Mon 10/266:05 am -
1 stop8h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Delta logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2610:19 pm -
2 stops35h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Frontier logo]()
$127
This Mytrip deal was found by Cheapflights users on 10/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/307:58 pm -
2 stops11h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/810:23 pm -
2 stops34h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Frontier logo]()
$128
Find flight deals from San Francisco to Illinois
Keep the following information in mind while searching for San Francisco to Illinois flight deals. Data was last updated October 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $262 (Southwest) |
One-way from | $122 (Super.com) |
Popular in | July |
Cheapest in | February |
Average price | $413 |
Good round-trip deal | $373 or less |
Good one-way deal | $218 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from San Francisco 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 October 9, 2026.
Use the filters below to find and compare flights from San Francisco to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San FranciscoChicago
SFO San Francisco - MDW Chicago Midway
SFOMDW
San Francisco
Thu 11/5
6:30 pm-4:25 am
1 stop7h 55m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$126
San FranciscoChicago
SFO San Francisco - MDW Chicago Midway
SFOMDW
San Francisco
Tue 10/27
6:05 am-4:47 pm
1 stop8h 42m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$126
San FranciscoChicago
SFO San Francisco - MDW Chicago Midway
SFOMDW
San Francisco
Wed 11/18
11:35 pm-8:50 am
1 stop7h 15m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$126
San FranciscoChicago
SFO San Francisco - MDW Chicago Midway
SFOMDW
San Francisco
Thu 10/29
2:40 pm-12:50 am
1 stop8h 10m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$126
San FranciscoChicago
SFO San Francisco - MDW Chicago Midway
SFOMDW
San Francisco
Mon 11/23
8:45 pm-5:55 am
1 stop7h 10m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$126
San FranciscoChicago
SFO San Francisco - MDW Chicago Midway
SFOMDW
San Francisco
Mon 10/26
10:55 pm-9:32 am
1 stop8h 37m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$126
San FranciscoChicago
SFO San Francisco - ORD Chicago O'Hare Intl
SFOORD
San Francisco
Wed 12/2
7:05 am-5:15 pm
1 stop8h 10m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$126
San FranciscoChicago
SFO San Francisco - MDW Chicago Midway
SFOMDW
San Francisco
Wed 11/18
7:00 am-5:20 pm
2 stops8h 20m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$131
San FranciscoChicago
SFO San Francisco - MDW Chicago Midway
SFOMDW
San Francisco
Fri 11/6
11:35 pm-6:00 am
Nonstop4h 25m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$156
San FranciscoChicago
SFO San Francisco - MDW Chicago Midway
SFOMDW
San Francisco
Fri 11/6
10:45 pm-9:32 am
1 stop8h 47m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$159
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from San Francisco to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from San Francisco with our price prediction graph.
SFO-ORD
SFO-MDW
SFO-BMI
SFO-PIA
SFO-CMI
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from San Francisco to Illinois
SFO-USIL
SFO-ORD
SFO-MDW
SFO-BMI
SFO-PIA
What is the cheapest month to book a flight from San Francisco to Illinois?
Currently, February is the cheapest month in which you can book a flight from San Francisco to Illinois (average of $370). Flying from San Francisco to Illinois in June is currently the most expensive (average of $484). 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 SFO to IL?
Find hourly flight availability from San Francisco 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 October 9, 2026.
It’s optimal to fly from San Francisco to Illinois in the evening. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight at noon.
Weekly flight availability from San Francisco to Illinois
Explore weekly flight availability from San Francisco 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 October 9, 2026.
The most flights from SFO to USIL are scheduled on a Wednesday (98 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (48 on average).
How much does it cost to fly round-trip from San Francisco to Illinois?
Airfare is below average for this route at the moment.
San Francisco to Illinois flights typically cost between $336 and $608 in October.The cheapest round-trip price found within the last 5 days was $262 on Frontier (Oct 21-Nov 11).
How far ahead should I book a flight from San Francisco to Illinois?
Booking 66 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to Illinois. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest day to fly from San Francisco to Illinois?
Use this chart to determine the cheapest time to fly round-trip from San Francisco to Illinois. Price data was last updated on October 3, 2026.
Travelers seeking maximum savings on their San Francisco to Illinois flight should consider departing on Monday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated October 9, 2026.
Get a feel of what it's like to fly with Southwest,United Airlines, andJetBlue from San Francisco to Illinois by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.4
Overall
7.9
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.4
Overall
7.9
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.4
Overall
7.9
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.4
Overall
7.9
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.4
Overall
7.9
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.4
Overall
7.9
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
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 Francisco 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 Francisco to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Francisco to Illinois by cabin class
Find flights from San Francisco to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Francisco and Illinois flights
Browse other San Francisco and Illinois flight options. Last updated on October 9, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
San Francisco to Illinois flights
Consider these flights traveling from San Francisco to Illinois.
Top 7 airlines flying from San Francisco to Illinois
Discover the top 7 airlines that operate flights from San Francisco 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 October 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$122 | Average$376 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$157 | Average$300 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$204 | Average$401 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$224 | Average$306 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$237 | Average$535 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$264 | Average$506 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$266 | Average$432 | FlexibilityNo cancel fee | On-time63% |