$81+ Cheap flights from Illinois to San Jose, CA (SJC)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SJC
Mar 12 — Mar 191
1 adult, Economy
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Cheapest flights from Illinois to San JoseExplore the most affordable flight options available from Illinois to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 10, 2026.
Explore the most affordable flight options available from Illinois to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 10, 2026.
This Frontier deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2610:11 pm
STL
- SJC
1 stop11h 44m
Frontier
Mon 3/29:35 am
SJC
- STL
1 stop9h 38m
Frontier
Deal found 2/10![Frontier logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 2/7. 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.
Sun 3/86:19 pm
STL
- SJC
2 stops27h 06m
Frontier
Sun 3/158:20 pm
SJC
- STL
1 stop12h 59m
Frontier
Deal found 2/7![Frontier logo]()
$240
This Trip.com deal was found by Cheapflights users on 2/8. 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 3/257:00 am
STL
- SJC
1 stop8h 35m
Hawaiian Airlines
Wed 4/12:29 pm
SJC
- STL
1 stop7h 30m
Hawaiian Airlines
Deal found 2/8![Hawaiian Airlines logo]()
$243
This Delta deal was found by Cheapflights users on 2/7. 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.
Sat 4/185:00 pm
STL
- SJC
1 stop6h 21m
Delta
Wed 4/226:20 am
SJC
- STL
1 stop6h 09m
Delta
Deal found 2/7![Delta logo]()
$257
This Expedia deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/612:14 pm
STL
- SJC
1 stop7h 53m
Multiple Airlines
Tue 3/106:03 pm
SJC
- STL
1 stop17h 48m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$259
This Delta deal was found by Cheapflights users on 2/8. 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 3/1012:02 pm
BMI
- SJC
2 stops12h 00m
Delta
Tue 3/178:35 pm
SJC
- BMI
2 stops12h 44m
Delta
Deal found 2/8![Delta logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 2/7. 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.
Sat 3/78:12 pm
STL
- SJC
2 stops48h 13m
Frontier
Sun 3/158:20 pm
SJC
- STL
1 stop12h 59m
Frontier
Deal found 2/7![Frontier logo]()
$268
This Kiwi.com deal was found by Cheapflights users on 2/7. 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 3/912:14 pm
STL
- SJC
2 stops9h 11m
Frontier
Mon 3/167:42 pm
SJC
- STL
1 stop21h 29m
Frontier
Deal found 2/7![Frontier logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 2/7. 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.
Fri 3/612:14 pm
STL
- SJC
1 stop7h 53m
Frontier
Sun 3/88:20 pm
SJC
- STL
1 stop12h 59m
Frontier
Deal found 2/7![Frontier logo]()
$279
This Delta deal was found by Cheapflights users on 2/7. 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.
Tue 4/143:25 pm
STL
- SJC
1 stop7h 12m
Delta
Sat 4/257:20 am
SJC
- STL
2 stops12h 11m
Delta
Deal found 2/7![Delta logo]()
$285
This Delta deal was found by Cheapflights users on 2/7. 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.
Tue 4/143:25 pm
STL
- SJC
1 stop7h 12m
Delta
Mon 4/207:20 am
SJC
- STL
2 stops15h 05m
Delta
Deal found 2/7![Delta logo]()
$292
This United Airlines deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/33:52 pm
MLI
- SJC
1 stop8h 44m
United Airlines
Wed 9/96:40 am
SJC
- MLI
1 stop9h 11m
United Airlines
Deal found 2/8![United Airlines logo]()
$309
Best flights from Illinois to San JoseDiscover carefully curated flight deals from Illinois to San Jose that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 10, 2026.
Discover carefully curated flight deals from Illinois to San Jose that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 10, 2026.
This Frontier deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2610:11 pm
STL
- SJC
1 stop11h 44m
Frontier
Mon 3/29:35 am
SJC
- STL
1 stop9h 38m
Frontier
Deal found 2/10![Frontier logo]()
$211
This Delta deal was found by Cheapflights users on 2/7. 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.
Tue 4/147:02 am
STL
- SJC
1 stop7h 21m
Delta
Wed 4/226:20 am
SJC
- STL
1 stop6h 09m
Delta
Deal found 2/7![Delta logo]()
$257
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/34:30 pm
STL
- SJC
1 stop6h 35m
United Airlines
Sat 3/710:55 pm
SJC
- STL
1 stop8h 41m
United Airlines
Deal found 2/9![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/48:25 am
STL
- SJC
1 stop9h 20m
Southwest
Wed 4/86:15 am
SJC
- STL
1 stop6h 15m
Southwest
Deal found 2/9![Southwest logo]()
$257
This Expedia deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/612:14 pm
STL
- SJC
1 stop7h 53m
Multiple Airlines
Tue 3/106:03 pm
SJC
- STL
1 stop17h 48m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$259
This Alaska Airlines deal was found by Cheapflights users on 2/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/133:07 pm
ORD
- SJC
1 stop9h 49m
Alaska Airlines
Sun 3/158:00 am
SJC
- ORD
1 stop26h 01m
Alaska Airlines
Deal found 2/9![Alaska Airlines logo]()
$353
This American Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1012:40 pm
MLI
- SJC
2 stops11h 52m
American Airlines
Sat 3/146:00 am
SJC
- MLI
2 stops10h 32m
American Airlines
Deal found 2/9![American Airlines logo]()
$476
This Delta deal was found by Cheapflights users on 2/8. 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 3/1012:02 pm
BMI
- SJC
2 stops12h 00m
Delta
Tue 3/178:35 pm
SJC
- BMI
2 stops12h 44m
Delta
Deal found 2/8![Delta logo]()
$261
This Delta deal was found by Cheapflights users on 2/8. 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.
Sat 4/185:00 pm
STL
- SJC
1 stop6h 21m
Delta
Sat 4/257:20 am
SJC
- STL
2 stops12h 11m
Delta
Deal found 2/8![Delta logo]()
$285
This Southwest deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/58:00 pm
MDW
- SJC
Nonstop4h 40m
Southwest
Wed 3/119:30 pm
SJC
- MDW
1 stop5h 50m
Southwest
Deal found 2/9![Southwest logo]()
$333
This Delta deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/37:00 am
STL
- SJC
2 stops12h 38m
Delta
Sat 3/710:35 pm
SJC
- STL
1 stop7h 12m
Delta
Deal found 2/9![Delta logo]()
$285
This United Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/118:49 am
MLI
- SJC
1 stop6h 52m
United Airlines
Wed 3/1810:55 pm
SJC
- MLI
1 stop9h 14m
United Airlines
Deal found 2/10![United Airlines logo]()
$350
This Southwest deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:15 am
MDW
- SJC
1 stop9h 15m
Southwest
Mon 3/910:55 pm
SJC
- MDW
Nonstop4h 05m
Southwest
Deal found 2/9![Southwest logo]()
$333
This Alaska Airlines deal was found by Cheapflights users on 2/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/145:39 pm
ORD
- SJC
1 stop8h 00m
Alaska Airlines
Wed 7/221:19 pm
SJC
- ORD
1 stop8h 40m
Alaska Airlines
Deal found 2/7![Alaska Airlines logo]()
$367
This Delta deal was found by Cheapflights users on 2/7. 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.
Sat 4/187:02 am
STL
- SJC
1 stop7h 21m
Delta
Tue 4/217:20 am
SJC
- STL
2 stops15h 05m
Delta
Deal found 2/7![Delta logo]()
$285
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/143:20 pm
MLI
- SJC
1 stop9h 16m
United Airlines
Sun 4/196:30 am
SJC
- MLI
1 stop8h 36m
United Airlines
Deal found 2/9![United Airlines logo]()
$352
This Southwest deal was found by Cheapflights users on 2/7. 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 3/265:40 am
MDW
- SJC
1 stop6h 40m
Southwest
Tue 3/3110:55 pm
SJC
- MDW
Nonstop4h 05m
Southwest
Deal found 2/7![Southwest logo]()
$333
This Delta deal was found by Cheapflights users on 2/7. 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.
Sat 3/76:00 am
STL
- SJC
1 stop8h 39m
Delta
Mon 3/911:40 am
SJC
- STL
2 stops10h 41m
Delta
Deal found 2/7![Delta logo]()
$292
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Wed 4/87:41 pm
ORD
- SJC
Nonstop4h 55m
United Airlines
Wed 4/156:30 am
SJC
- ORD
Nonstop4h 26m
United Airlines
Deal found 2/8![United Airlines logo]()
$367
This Southwest deal was found by Cheapflights users on 2/6. 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.
Thu 3/268:00 pm
MDW
- SJC
Nonstop4h 40m
Southwest
Tue 4/71:45 pm
SJC
- MDW
2 stops7h 35m
Southwest
Deal found 2/6![Southwest logo]()
$338
This Delta deal was found by Cheapflights users on 2/7. 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.
Tue 4/147:02 am
STL
- SJC
1 stop7h 21m
Delta
Thu 4/237:20 am
SJC
- STL
2 stops15h 05m
Delta
Deal found 2/7![Delta logo]()
$292
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Wed 4/87:41 pm
ORD
- SJC
Nonstop4h 55m
United Airlines
Tue 4/146:30 am
SJC
- ORD
Nonstop4h 26m
United Airlines
Deal found 2/8![United Airlines logo]()
$367
This American Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/1312:36 pm
MLI
- SJC
2 stops11h 55m
American Airlines
Fri 2/202:07 pm
SJC
- MLI
1 stop6h 46m
American Airlines
Deal found 2/9![American Airlines logo]()
$489
This Southwest deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/223:40 pm
MDW
- SJC
Nonstop4h 35m
Southwest
Fri 4/2410:55 pm
SJC
- MDW
Nonstop4h 05m
Southwest
Deal found 2/8![Southwest logo]()
$342
This Delta deal was found by Cheapflights users on 2/7. 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 4/177:02 am
STL
- SJC
1 stop7h 21m
Delta
Wed 4/226:20 am
SJC
- STL
1 stop6h 09m
Delta
Deal found 2/7![Delta logo]()
$300
This American Airlines deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/163:33 pm
MLI
- SJC
1 stop7h 57m
American Airlines
Mon 2/232:07 pm
SJC
- MLI
1 stop7h 21m
American Airlines
Deal found 2/8![American Airlines logo]()
$491
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/49:00 am
PIA
- SJC
1 stop6h 41m
United Airlines
Mon 3/910:55 pm
SJC
- PIA
1 stop9h 08m
United Airlines
Deal found 2/9![United Airlines logo]()
$399
This Delta deal was found by Cheapflights users on 2/7. 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.
Sat 4/185:00 pm
STL
- SJC
1 stop6h 21m
Delta
Fri 4/2410:55 pm
SJC
- STL
1 stop7h 35m
Delta
Deal found 2/7![Delta logo]()
$300
This United Airlines deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/105:25 pm
PIA
- SJC
1 stop7h 34m
United Airlines
Tue 3/1710:55 pm
SJC
- PIA
1 stop9h 08m
United Airlines
Deal found 2/8![United Airlines logo]()
$399
This American Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/253:45 pm
BMI
- SJC
1 stop7h 45m
American Airlines
Sun 3/16:00 am
SJC
- BMI
1 stop7h 15m
American Airlines
Deal found 2/10![American Airlines logo]()
$544
Last-minute flights from Illinois to San JoseDiscover last-minute flight deals from Illinois to San Jose. Data last updated February 10, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to San Jose. Data last updated February 10, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 2/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1910:11 pm
STL
- SJC
1 stop11h 44m
Frontier
Mon 2/239:35 am
SJC
- STL
1 stop9h 38m
Frontier
Deal found 2/7![Frontier logo]()
$297
This Delta deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/37:00 am
STL
- SJC
2 stops12h 38m
Delta
Sat 3/710:35 pm
SJC
- STL
1 stop7h 12m
Delta
Deal found 2/9![Delta logo]()
$285
This Delta deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/56:00 am
MDW
- SJC
1 stop8h 39m
Delta
Wed 3/118:35 pm
SJC
- MDW
2 stops10h 18m
Delta
Deal found 2/9![Delta logo]()
$325
This Expedia deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/612:14 pm
STL
- SJC
1 stop7h 53m
Multiple Airlines
Tue 3/106:03 pm
SJC
- STL
1 stop17h 48m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 2/7. 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.
Fri 3/612:14 pm
STL
- SJC
1 stop7h 53m
Frontier
Sun 3/158:20 pm
SJC
- STL
1 stop12h 59m
Frontier
Deal found 2/7![Frontier logo]()
$279
This Delta deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/76:00 am
STL
- SJC
1 stop8h 39m
Delta
Sat 3/141:25 pm
SJC
- STL
1 stop8h 33m
Delta
Deal found 2/9![Delta logo]()
$257
This Kiwi.com deal was found by Cheapflights users on 2/7. 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.
Sat 3/78:12 pm
STL
- SJC
2 stops48h 13m
Frontier
Sun 3/158:20 pm
SJC
- STL
1 stop12h 59m
Frontier
Deal found 2/7![Frontier logo]()
$268
This Delta deal was found by Cheapflights users on 2/7. 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.
Sat 3/76:00 am
STL
- SJC
1 stop8h 39m
Delta
Mon 3/911:40 am
SJC
- STL
2 stops10h 41m
Delta
Deal found 2/7![Delta logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 2/7. 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.
Sun 3/86:19 pm
STL
- SJC
2 stops27h 06m
Frontier
Sun 3/158:20 pm
SJC
- STL
1 stop12h 59m
Frontier
Deal found 2/7![Frontier logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 2/7. 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 3/912:14 pm
STL
- SJC
2 stops9h 11m
Frontier
Mon 3/167:42 pm
SJC
- STL
1 stop21h 29m
Frontier
Deal found 2/7![Frontier logo]()
$275
This Delta deal was found by Cheapflights users on 2/8. 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 3/1012:02 pm
BMI
- SJC
2 stops12h 00m
Delta
Tue 3/178:35 pm
SJC
- BMI
2 stops12h 44m
Delta
Deal found 2/8![Delta logo]()
$261
This Trip.com deal was found by Cheapflights users on 2/8. 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 3/257:00 am
STL
- SJC
1 stop8h 35m
Hawaiian Airlines
Wed 4/12:29 pm
SJC
- STL
1 stop7h 30m
Hawaiian Airlines
Deal found 2/8![Hawaiian Airlines logo]()
$243
One-way flights from Illinois to San JoseSearch for one-way flight options from Illinois to San Jose. Find affordable one-way fares based on user searches. Data last updated February 10, 2026.
Search for one-way flight options from Illinois to San Jose. Find affordable one-way fares based on user searches. Data last updated February 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 5/68:53 pm
ORD
- SJC
1 stop23h 09m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$81
This Trip.com deal was found by Cheapflights users on 2/8. 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.
Sun 5/107:21 pm
ORD
- SJC
1 stop26h 04m
Frontier
Deal found 2/8![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/106:15 am
MDW
- SJC
2 stops39h 10m
Frontier
Deal found 2/10![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 2/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:10 am
ORD
- SJC
2 stops27h 29m
Frontier
Deal found 2/7![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 3/1111:25 am
MDW
- SJC
2 stops32h 42m
Frontier
Deal found 2/8![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 2/7. 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.
Sun 4/266:15 am
MDW
- SJC
2 stops39h 10m
Frontier
Deal found 2/7![Frontier logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 2/7. 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 4/206:15 am
MDW
- SJC
2 stops13h 47m
Frontier
Deal found 2/7![Frontier logo]()
$100
This Booking.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/258:55 pm
ORD
- SJC
1 stop23h 12m
Frontier
Deal found 2/10![Frontier logo]()
$101
This CheapOair deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2610:11 pm
STL
- SJC
1 stop11h 44m
Frontier
Deal found 2/9![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/276:15 am
MDW
- SJC
2 stops13h 47m
Frontier
Deal found 2/10![Frontier logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/114:28 pm
ORD
- SJC
2 stops27h 39m
Frontier
Deal found 2/9![Frontier logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 2/7. 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.
Sun 4/196:15 am
MDW
- SJC
2 stops37h 47m
Frontier
Deal found 2/7![Frontier logo]()
$107
Find flight deals from Illinois to San Jose
Keep the following information in mind while searching for Illinois to San Jose flight deals. Data was last updated February 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $240 (Kiwi.com) |
One-way from | $81 (Kiwi.com) |
Popular in | February |
Cheapest in | January |
Average price | $634 |
Good round-trip deal | $380 or less |
Good one-way deal | $258 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to San Jose that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 10, 2026.
Use the filters below to find and compare flights from Illinois to San Jose that are best for you.
Fly from
Illinois
Fly to
San Jose
Route
Depart
Return
Price
St. LouisSan Jose
STL - SJC
STLSJC
Lambert-St Louis
Thu 2/26
10:11 pm-7:55 am
1 stop11h 44m
San Jose
Mon 3/2
9:35 am-9:13 pm
1 stop9h 38m
$211
St. LouisSan Jose
STL - SJC
STLSJC
Lambert-St Louis
Tue 4/14
7:02 am-12:23 pm
1 stop7h 21m
San Jose
Wed 4/22
6:20 am-2:29 pm
1 stop6h 09m
$257
St. LouisSan Jose
STL - SJC
STLSJC
Lambert-St Louis
Tue 3/3
4:30 pm-9:05 pm
1 stop6h 35m
San Jose
Sat 3/7
10:55 pm-9:36 am
1 stop8h 41m
$257
St. LouisSan Jose
STL - SJC
STLSJC
Lambert-St Louis
Sat 4/4
8:25 am-3:45 pm
1 stop9h 20m
San Jose
Wed 4/8
6:15 am-2:30 pm
1 stop6h 15m
$257
St. LouisSan Jose
STL - SJC
STLSJC
Lambert-St Louis
Fri 3/6
12:14 pm-6:07 pm
1 stop7h 53m
San Jose
Tue 3/10
6:03 pm-1:51 pm
1 stop17h 48m
$259
BloomingtonSan Jose
BMI - SJC
BMISJC
Bloomington-Normal
Tue 3/10
12:02 pm-10:02 pm
2 stops12h 00m
San Jose
Tue 3/17
8:35 pm-11:19 am
2 stops12h 44m
$261
St. LouisSan Jose
STL - SJC
STLSJC
Lambert-St Louis
Sat 4/18
5:00 pm-9:21 pm
1 stop6h 21m
San Jose
Sat 4/25
7:20 am-9:31 pm
2 stops12h 11m
$285
St. LouisSan Jose
STL - SJC
STLSJC
Lambert-St Louis
Tue 3/3
7:00 am-5:38 pm
2 stops12h 38m
San Jose
Sat 3/7
10:35 pm-7:47 am
1 stop7h 12m
$285
St. LouisSan Jose
STL - SJC
STLSJC
Lambert-St Louis
Sat 4/18
7:02 am-12:23 pm
1 stop7h 21m
San Jose
Tue 4/21
7:20 am-12:25 am
2 stops15h 05m
$285
St. LouisSan Jose
STL - SJC
STLSJC
Lambert-St Louis
Sat 3/7
6:00 am-12:39 pm
1 stop8h 39m
San Jose
Mon 3/9
11:40 am-12:21 am
2 stops10h 41m
$292
Showing 1-10 of 60 results
Best time to book a flight from Illinois to San Jose
Have a flexible travel schedule? Discover the best time to fly to San Jose from Illinois with our price prediction graph.
STL-SJC
ORD-SJC
MDW-SJC
BMI-SJC
MLI-SJC
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 Jose
USIL-SJC
STL-SJC
ORD-SJC
MDW-SJC
BMI-SJC
What is the cheapest month to book a flight from Illinois to San Jose, California?
Currently, October is the cheapest month in which you can book a flight from Illinois to San Jose, California (average of $80). Flying from Illinois to San Jose, California in February is currently the most expensive (average of $208). 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 SJC?
Find hourly flight availability from Illinois to San Jose. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 10, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 39% on flights from Illinois to San Jose, California by exploring options for tickets at noon.
Related info for your journey
Find useful and relevant information for your journey from Illinois to San Jose. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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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Top destinations
Alternative routes for Illinois to San Jose
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to San Jose by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to San Jose by cabin class
Find flights from Illinois to San Jose, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and San Jose flights
Browse other Illinois and San Jose flight options. Last updated on February 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Jose
Explore flights to San Jose departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on February 10, 2026.
Illinois to San Jose flights
Consider these flights traveling from Illinois to San Jose.
Top 7 airlines flying from Illinois to San Jose
Discover the top 7 airlines that operate flights from Illinois to San Jose. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$80 | Average$222 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$144 | Average$204 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$189 | Average$363 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$262 | Average$366 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$288 | Average$556 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$333 | Average$472 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$337 | Average$620 | FlexibilityNo cancel fee | On-time69% |