$116+ Cheap flights from Illinois to San Francisco (SFO)
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 11/30. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SFO
Nov 18 — Nov 251
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to San Francisco 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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Illinois to San Francisco
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Cheapest flights from Illinois to San FranciscoExplore the most affordable flight options available from Illinois to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 19, 2026.
Explore the most affordable flight options available from Illinois to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/118:59 am -
2 stops30h 37m
Mon 11/162:21 pm -
1 stop12h 52m
Deal found 10/15![Frontier logo]()
$258
This Southwest deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 12/310:15 am -
2 stops10h 35m
Wed 12/911:35 pm -
Nonstop4h 25m
Deal found 10/18![Southwest logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:59 am -
2 stops30h 37m
Thu 11/122:21 pm -
1 stop12h 52m
Deal found 10/14![Frontier logo]()
$259
This Frontier deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 11/1212:20 pm -
1 stop12h 09m
Mon 11/1611:47 pm -
1 stop9h 35m
Deal found 10/15![Frontier logo]()
$260
This Frontier deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/610:29 am -
1 stop14h 35m
Thu 11/1210:20 pm -
1 stop8h 54m
Deal found 10/16![Frontier logo]()
$260
This Cheapflightsfares deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 11/267:49 am -
1 stop10h 49m
Wed 12/22:21 pm -
1 stop12h 38m
Deal found 10/18![Frontier logo]()
$262
This Southwest deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 11/106:05 am -
1 stop7h 05m
Mon 11/161:05 pm -
1 stop6h 55m
Deal found 10/19![Southwest logo]()
$263
This Cheapflightsfares deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” 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 12/107:25 am -
1 stop14h 06m
Mon 12/146:30 pm -
1 stop8h 31m
Deal found 10/14![Frontier logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/111:13 pm -
1 stop28h 49m
Wed 11/183:05 pm -
1 stop18h 42m
Deal found 10/17![Multiple Airlines logo]()
$263
This Southwest deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 11/101:20 pm -
2 stops10h 05m
Sat 11/1411:35 pm -
Nonstop4h 25m
Deal found 10/19![Southwest logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” 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 11/165:15 pm -
1 stop17h 04m
Wed 11/1812:20 pm -
1 stop10h 01m
Deal found 10/14![Frontier logo]()
$264
This Cheapflightsfares deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 11/712:20 pm -
1 stop12h 09m
Sat 11/1411:47 pm -
1 stop9h 38m
Deal found 10/15![Frontier logo]()
$265
Best flights from Illinois to San FranciscoDiscover carefully curated flight deals from Illinois to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 19, 2026.
Discover carefully curated flight deals from Illinois to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 19, 2026.
This Southwest deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 12/31:20 pm -
2 stops10h 55m
Thu 12/107:00 am -
2 stops8h 20m
Deal found 10/19![Southwest logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” 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 11/128:52 pm -
1 stop13h 27m
Tue 11/179:27 pm -
2 stops36h 20m
Deal found 10/14![Multiple Airlines logo]()
$292
This Alaska Airlines deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 12/59:00 am -
2 stops13h 31m
Tue 12/88:40 am -
2 stops13h 19m
Deal found 10/19![Alaska Airlines logo]()
$353
This United Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” 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 12/237:37 am -
Nonstop5h 03m
Fri 1/112:55 am -
Nonstop4h 29m
Deal found 10/14![United Airlines logo]()
$361
This Delta deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 2/245:55 am -
1 stop8h 50m
Sun 3/710:30 pm -
1 stop9h 56m
Deal found 10/19![Delta logo]()
$379
This American Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” 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 12/311:26 am -
1 stop7h 04m
Thu 12/1011:52 pm -
1 stop9h 04m
Deal found 10/14![American Airlines logo]()
$399
This Southwest deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 11/611:00 am -
Nonstop4h 50m
Thu 11/1211:35 pm -
Nonstop4h 25m
Deal found 10/16![Southwest logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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 11/58:52 pm -
1 stop22h 17m
Wed 11/117:14 pm -
1 stop22h 48m
Deal found 10/17![Multiple Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 3/211:00 am -
1 stop9h 47m
Mon 3/86:00 am -
1 stop8h 22m
Deal found 10/19![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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 11/2511:52 am -
Nonstop4h 50m
Mon 11/3010:45 pm -
Nonstop4h 17m
Deal found 10/17![United Airlines logo]()
$385
This Southwest deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 11/65:20 pm -
2 stops8h 05m
Sat 11/711:20 am -
2 stops9h 00m
Deal found 10/15![Southwest logo]()
$367
This Alaska Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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.
Sun 1/178:00 am -
1 stop9h 41m
Sat 1/237:21 am -
2 stops12h 47m
Deal found 10/15![Alaska Airlines logo]()
$406
This Delta deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 2/245:55 am -
1 stop8h 50m
Sat 3/66:00 am -
1 stop8h 22m
Deal found 10/19![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 11/197:35 am -
Nonstop4h 53m
Wed 11/253:20 pm -
Nonstop4h 25m
Deal found 10/18![United Airlines logo]()
$385
This Kiwi.com deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 12/2012:27 pm -
2 stops10h 59m
Wed 1/69:10 pm -
1 stop12h 42m
Deal found 10/16![Multiple Airlines logo]()
$398
This Southwest deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 11/118:00 am -
1 stop9h 50m
Wed 11/1111:35 pm -
Nonstop4h 25m
Deal found 10/16![Southwest logo]()
$380
This KAYAK deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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.
Thu 11/266:50 am -
1 stop9h 15m
Fri 12/45:34 pm -
Nonstop4h 21m
Deal found 10/15![American Airlines logo]()
$467
This Delta deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” 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 11/205:29 pm -
1 stop8h 32m
Mon 11/2311:35 pm -
1 stop7h 15m
Deal found 10/14![Delta logo]()
$396
This Kiwi.com deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 11/611:23 am -
1 stop30h 39m
Thu 11/121:36 pm -
1 stop18h 57m
Deal found 10/16![Multiple Airlines logo]()
$402
This United Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 11/410:43 am -
1 stop7h 37m
Sat 11/712:55 am -
1 stop7h 13m
Deal found 10/16![United Airlines logo]()
$414
This Alaska Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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.
Tue 11/246:00 am -
2 stops12h 34m
Mon 11/304:23 pm -
1 stop18h 52m
Deal found 10/16![Alaska Airlines logo]()
$463
This Southwest deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 11/1211:00 am -
Nonstop4h 50m
Mon 11/166:00 am -
Nonstop4h 15m
Deal found 10/18![Southwest logo]()
$385
This American Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:54 am -
2 stops10h 43m
Sun 11/16:01 am -
1 stop9h 07m
Deal found 10/16![American Airlines logo]()
$496
This United Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 11/510:40 am -
1 stop8h 45m
Tue 11/105:00 am -
1 stop6h 55m
Deal found 10/16![United Airlines logo]()
$414
This Kiwi.com deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 11/912:03 pm -
1 stop29h 59m
Wed 11/113:05 pm -
1 stop26h 57m
Deal found 10/15![Multiple Airlines logo]()
$417
This Southwest deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” 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 12/2310:25 pm -
Nonstop4h 50m
Tue 12/292:05 pm -
1 stop8h 30m
Deal found 10/14![Southwest logo]()
$389
This United Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 12/111:57 pm -
Nonstop4h 53m
Sun 12/133:00 pm -
Nonstop4h 11m
Deal found 10/15![United Airlines logo]()
$415
This Delta deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 3/25:55 am -
2 stops16h 23m
Sat 3/66:00 am -
1 stop8h 22m
Deal found 10/19![Delta logo]()
$457
This Southwest deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 11/2510:25 pm -
Nonstop4h 55m
Mon 11/3011:35 pm -
Nonstop4h 25m
Deal found 10/19![Southwest logo]()
$390
This American Airlines deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 11/36:46 am -
1 stop7h 55m
Sat 11/71:42 pm -
1 stop8h 45m
Deal found 10/19![American Airlines logo]()
$522
Last-minute flights from Illinois to San FranciscoDiscover last-minute flight deals from Illinois to San Francisco. Data last updated October 19, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to San Francisco. Data last updated October 19, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:59 am -
2 stops30h 37m
Thu 11/122:21 pm -
1 stop12h 52m
Deal found 10/14![Frontier logo]()
$259
This Frontier deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/610:29 am -
1 stop14h 35m
Thu 11/1210:20 pm -
1 stop8h 54m
Deal found 10/16![Frontier logo]()
$260
This Cheapflightsfares deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 11/712:20 pm -
1 stop12h 09m
Sat 11/1411:47 pm -
1 stop9h 38m
Deal found 10/15![Frontier logo]()
$265
This Southwest deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 11/101:20 pm -
2 stops10h 05m
Sat 11/1411:35 pm -
Nonstop4h 25m
Deal found 10/19![Southwest logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/118:59 am -
2 stops30h 37m
Mon 11/162:21 pm -
1 stop12h 52m
Deal found 10/15![Frontier logo]()
$258
This Kiwi.com deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/111:13 pm -
1 stop28h 49m
Wed 11/183:05 pm -
1 stop18h 42m
Deal found 10/17![Multiple Airlines logo]()
$263
This Frontier deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 11/1212:20 pm -
1 stop12h 09m
Mon 11/1611:47 pm -
1 stop9h 35m
Deal found 10/15![Frontier logo]()
$260
This Kiwi.com deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” 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 11/165:15 pm -
1 stop17h 04m
Wed 11/1812:20 pm -
1 stop10h 01m
Deal found 10/14![Frontier logo]()
$264
This Delta deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 11/247:45 am -
1 stop8h 07m
Tue 1/196:00 am -
1 stop8h 37m
Deal found 10/19![Delta logo]()
$263
This Southwest deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 11/2510:25 pm -
Nonstop4h 55m
Sat 1/165:00 am -
2 stops7h 40m
Deal found 10/19![Southwest logo]()
$259
This Cheapflightsfares deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 11/267:49 am -
1 stop10h 49m
Wed 12/22:21 pm -
1 stop12h 38m
Deal found 10/18![Frontier logo]()
$262
This Southwest deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 11/265:40 am -
1 stop8h 30m
Tue 12/11:20 pm -
1 stop6h 10m
Deal found 10/18![Southwest logo]()
$263
One-way flights from Illinois to San FranciscoSearch for one-way flight options from Illinois to San Francisco. Find affordable one-way fares based on user searches. Data last updated October 19, 2026.
Search for one-way flight options from Illinois to San Francisco. Find affordable one-way fares based on user searches. Data last updated October 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 11/301:38 pm -
1 stop22h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Multiple Airlines logo]()
$116
This Super.com deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 11/66:30 am -
1 stop6h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Frontier logo]()
$137
This Super.com deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” 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 11/412:27 pm -
1 stop12h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Frontier logo]()
$138
This Cheapflightsfares deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” 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 11/2310:00 pm -
1 stop19h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Frontier logo]()
$139
This Super.com deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 11/229:09 am -
1 stop9h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![Frontier logo]()
$140
This Frontier deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 11/106:30 am -
1 stop6h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Frontier logo]()
$140
This Super.com deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:30 am -
1 stop6h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 12/27:00 am -
2 stops32h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Frontier logo]()
$142
This Southwest deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 11/101:20 pm -
2 stops10h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Southwest logo]()
$143
This Frontier deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 11/126:30 am -
1 stop6h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Frontier logo]()
$143
This CheapOair deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/249:09 am -
1 stop9h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Frontier logo]()
$144
This Cheapflightsfares deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 11/2510:00 pm -
1 stop19h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![Frontier logo]()
$144
Find flight deals from Illinois to San Francisco
Keep the following information in mind while searching for Illinois to San Francisco flight deals. Data was last updated October 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $258 (Kiwi.com) |
One-way from | $116 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $371 |
Good round-trip deal | $310 or less |
Good one-way deal | $235 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to San Francisco 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 19, 2026.
Use the filters below to find and compare flights from Illinois to San Francisco that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
MolineSan Francisco
MLI Moline Quad-City - SFO San Francisco
MLISFO
Moline Quad-City
Mon 11/30
1:38 pm-9:40 am
1 stop22h 02m
San Francisco
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$116
ChicagoSan Francisco
MDW Chicago Midway - SFO San Francisco
MDWSFO
Chicago Midway
Tue 11/10
1:20 pm-9:25 pm
2 stops10h 05m
San Francisco
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$143
ChicagoSan Francisco
ORD Chicago O'Hare Intl - SFO San Francisco
ORDSFO
Chicago O'Hare Intl
Fri 12/11
7:29 am-10:25 am
Nonstop4h 56m
San Francisco
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$169
ChicagoSan Francisco
MDW Chicago Midway - SFO San Francisco
MDWSFO
Chicago Midway
Thu 11/12
11:00 am-1:50 pm
Nonstop4h 50m
San Francisco
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$169
ChicagoSan Francisco
ORD Chicago O'Hare Intl - SFO San Francisco
ORDSFO
Chicago O'Hare Intl
Fri 11/6
2:30 pm-5:25 pm
Nonstop4h 55m
San Francisco
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$169
ChicagoSan Francisco
MDW Chicago Midway - SFO San Francisco
MDWSFO
Chicago Midway
Fri 11/6
11:00 am-1:50 pm
Nonstop4h 50m
San Francisco
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$169
ChicagoSan Francisco
ORD Chicago O'Hare Intl - SFO San Francisco
ORDSFO
Chicago O'Hare Intl
Tue 11/17
1:30 pm-4:20 pm
Nonstop4h 50m
San Francisco
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$169
ChicagoSan Francisco
ORD Chicago O'Hare Intl - SFO San Francisco
ORDSFO
Chicago O'Hare Intl
Mon 12/21
3:57 pm-6:57 pm
Nonstop5h 00m
San Francisco
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$169
ChicagoSan Francisco
ORD Chicago O'Hare Intl - SFO San Francisco
ORDSFO
Chicago O'Hare Intl
Thu 11/12
8:29 pm-11:28 pm
Nonstop4h 59m
San Francisco
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$175
ChicagoSan Francisco
ORD Chicago O'Hare Intl - SFO San Francisco
ORDSFO
Chicago O'Hare Intl
Wed 12/2
9:00 am-8:31 pm
2 stops13h 31m
San Francisco
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$177
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to San Francisco
Have a flexible travel schedule? Discover the best time to fly to San Francisco from Illinois with our price prediction graph.
MLI-SFO
ORD-SFO
MDW-SFO
RFD-SFO
PIA-SFO
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Illinois to San Francisco
USIL-SFO
MLI-SFO
ORD-SFO
MDW-SFO
RFD-SFO
What is the cheapest month to book a flight from Illinois to San Francisco?
Currently, January is the cheapest month in which you can book a flight from Illinois to San Francisco (average of $393). Flying from Illinois to San Francisco in June is currently the most expensive (average of $476). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from IL to SFO?
Find hourly flight availability from Illinois to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 19, 2026.
It’s optimal to fly from Illinois to San Francisco in the evening. By choosing this option you can save up to 14% on the cost of your flight, compared to a flight in the afternoon.
Weekly flight availability from Illinois to San Francisco
Explore weekly flight availability from Illinois to San Francisco. 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 19, 2026.
The most flights from USIL to SFO are scheduled on a Sunday (104 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (73 on average).
How much does it cost to fly round-trip from Illinois to San Francisco?
Airfare is below average for this route at the moment.
Illinois to San Francisco flights typically cost between $305 and $644 in November.The cheapest round-trip price found within the last 5 days was $258 on Frontier (Nov 11-Nov 16).
How far ahead should I book a flight from Illinois to San Francisco?
Booking 60 days in advance of your planned departure date is, on average, the best time to get cheap flights from Illinois to San Francisco. 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 Illinois to San Francisco?
Use this chart to determine the cheapest time to fly round-trip from Illinois to San Francisco. Price data was last updated on October 17, 2026.
Travelers seeking maximum savings on their Illinois to San Francisco flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Related info for your journey
Find useful and relevant information for your journey from Illinois to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Francisco?
Book flights to San Francisco if you plan to visit one of these locationsSouth San Francisco
Santa Clara
Santa Cruz
Walnut Creek
Hayward
San Bruno
Emeryville
Burlingame
Roseville
Redwood City
Rancho Cordova
Cupertino
Newark
Fairfield
San Ramon
Manteca
San Carlos
Vallejo
Turlock
Davis
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for Illinois to San Francisco
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to San Francisco by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to San Francisco by cabin class
Find flights from Illinois to San Francisco, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and San Francisco flights
Browse other Illinois and San Francisco flight options. Last updated on October 19, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Francisco
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 19, 2026.
Illinois to San Francisco flights
Consider these flights traveling from Illinois to San Francisco.
Top 7 airlines flying from Illinois to San Francisco
Discover the top 7 airlines that operate flights from Illinois to San Francisco. 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 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$110 | Average$271 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$162 | Average$331 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$205 | Average$315 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$236 | Average$486 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$243 | Average$325 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$255 | Average$475 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$257 | Average$403 | FlexibilityNo cancel fee | On-time63% |