$87+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SJC
Mar 27 — Apr 31
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 25, 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 25, 2026.
This Delta deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 4/302:20 pm
STL
- SJC
2 stops9h 55m
Delta
Mon 5/46:32 pm
SJC
- STL
2 stops13h 10m
Delta
Deal found 2/24![Delta logo]()
$253
This Alaska Airlines deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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.
Wed 3/257:00 am
STL
- SJC
1 stop8h 35m
Alaska Airlines
Tue 3/318:00 am
SJC
- STL
1 stop28h 51m
Alaska Airlines
Deal found 2/24![Alaska Airlines logo]()
$263
This Delta deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 3/257:15 am
STL
- SJC
2 stops12h 16m
Delta
Wed 4/111:40 am
SJC
- STL
2 stops10h 41m
Delta
Deal found 2/24![Delta logo]()
$274
This CheapOair deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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.
Wed 4/227:00 am
STL
- SJC
1 stop13h 49m
Alaska Airlines
Sat 4/252:44 pm
SJC
- STL
1 stop7h 15m
Alaska Airlines
Deal found 2/23![Alaska Airlines logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 4/77:00 am
STL
- SJC
1 stop13h 11m
Hawaiian Airlines
Tue 4/1410:25 am
SJC
- STL
1 stop11h 34m
Hawaiian Airlines
Deal found 2/21![Hawaiian Airlines logo]()
$295
This Delta deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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
Thu 4/166:00 am
SJC
- STL
1 stop5h 23m
Delta
Deal found 2/24![Delta logo]()
$298
This United Airlines deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 4/222:40 pm
STL
- SJC
1 stop8h 28m
United Airlines
Tue 5/512:56 pm
SJC
- STL
1 stop7h 34m
United Airlines
Deal found 2/22![United Airlines logo]()
$303
This Delta deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/176:32 am
STL
- SJC
2 stops12h 59m
Delta
Wed 3/186:00 am
SJC
- STL
1 stop5h 31m
Delta
Deal found 2/23![Delta logo]()
$308
This Southwest deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 4/73:55 pm
STL
- SJC
2 stops9h 05m
Southwest
Tue 4/146:45 am
SJC
- STL
2 stops9h 10m
Southwest
Deal found 2/22![Southwest logo]()
$313
This Delta deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 4/206:45 pm
STL
- SJC
1 stop6h 57m
Delta
Fri 4/246:32 pm
SJC
- STL
2 stops13h 16m
Delta
Deal found 2/24![Delta logo]()
$314
This Delta deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 5/194:14 pm
BMI
- SJC
1 stop8h 41m
Delta
Mon 5/2510:55 pm
SJC
- BMI
2 stops10h 28m
Delta
Deal found 2/24![Delta logo]()
$314
This CheapOair deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 4/144:10 pm
ORD
- SJC
1 stop23h 48m
Alaska Airlines
Thu 4/168:00 am
SJC
- ORD
1 stop20h 39m
Alaska Airlines
Deal found 2/24![Alaska Airlines logo]()
$327
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 25, 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 25, 2026.
This Delta deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 5/52:20 pm
STL
- SJC
2 stops9h 55m
Delta
Tue 5/128:45 pm
SJC
- STL
2 stops11h 47m
Delta
Deal found 2/22![Delta logo]()
$313
This Southwest deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 4/153:40 pm
MDW
- SJC
Nonstop4h 35m
Southwest
Sun 4/1910:55 pm
SJC
- MDW
Nonstop4h 05m
Southwest
Deal found 2/20![Southwest logo]()
$332
This Alaska Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 6/59:00 am
ORD
- SJC
1 stop11h 21m
Alaska Airlines
Mon 6/812:59 pm
SJC
- ORD
1 stop8h 56m
Alaska Airlines
Deal found 2/21![Alaska Airlines logo]()
$333
This United Airlines deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 4/77:41 pm
ORD
- SJC
Nonstop4h 55m
United Airlines
Wed 4/86:30 am
SJC
- ORD
Nonstop4h 26m
United Airlines
Deal found 2/24![United Airlines logo]()
$365
This American Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 4/2412:04 pm
MLI
- SJC
2 stops12h 55m
American Airlines
Sun 4/266:00 am
SJC
- MLI
1 stop7h 18m
American Airlines
Deal found 2/20![American Airlines logo]()
$496
This Delta deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 6/311:00 am
MLI
- SJC
1 stop10h 02m
Delta
Mon 6/810:20 pm
SJC
- MLI
1 stop10h 06m
Delta
Deal found 2/23![Delta logo]()
$334
This Southwest deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 3/195:40 am
MDW
- SJC
1 stop6h 40m
Southwest
Wed 3/256:00 am
SJC
- MDW
2 stops8h 10m
Southwest
Deal found 2/20![Southwest logo]()
$338
This Alaska Airlines deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 3/277:00 am
STL
- SJC
1 stop28h 28m
Alaska Airlines
Tue 3/318:00 am
SJC
- STL
1 stop28h 51m
Alaska Airlines
Deal found 2/24![Alaska Airlines logo]()
$343
This Southwest deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 3/183:45 pm
ORD
- SJC
2 stops9h 25m
Southwest
Tue 4/72:55 pm
SJC
- ORD
1 stop6h 00m
Southwest
Deal found 2/21![Southwest logo]()
$338
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 4/162:20 pm
STL
- SJC
2 stops9h 55m
Delta
Sat 4/186:20 am
SJC
- STL
1 stop6h 09m
Delta
Deal found 2/21![Delta logo]()
$356
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 4/283:20 pm
MLI
- SJC
1 stop9h 16m
United Airlines
Sat 5/26:30 am
SJC
- MLI
1 stop8h 21m
United Airlines
Deal found 2/20![United Airlines logo]()
$399
This Alaska Airlines deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 3/248:20 am
ORD
- SJC
1 stop7h 38m
Alaska Airlines
Thu 3/262:35 pm
SJC
- ORD
1 stop7h 24m
Alaska Airlines
Deal found 2/22![Alaska Airlines logo]()
$380
This Southwest deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 4/247:20 pm
ORD
- SJC
1 stop6h 35m
Southwest
Mon 4/271:00 pm
SJC
- ORD
2 stops8h 55m
Southwest
Deal found 2/22![Southwest logo]()
$351
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 4/243:20 pm
MLI
- SJC
1 stop9h 16m
United Airlines
Sun 4/266:30 am
SJC
- MLI
1 stop8h 36m
United Airlines
Deal found 2/20![United Airlines logo]()
$408
This Delta deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 4/47:20 am
ORD
- SJC
2 stops12h 05m
Delta
Wed 4/87:00 am
SJC
- ORD
2 stops14h 52m
Delta
Deal found 2/24![Delta logo]()
$372
This Southwest deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 3/1710:20 am
MDW
- SJC
1 stop7h 00m
Southwest
Sun 4/59:10 pm
SJC
- MDW
1 stop6h 30m
Southwest
Deal found 2/21![Southwest logo]()
$352
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 3/219:35 am
ORD
- SJC
2 stops14h 01m
Delta
Tue 3/2410:50 pm
SJC
- ORD
1 stop7h 40m
Delta
Deal found 2/21![Delta logo]()
$373
This United Airlines deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 5/297:45 pm
ORD
- SJC
Nonstop4h 45m
United Airlines
Mon 6/12:32 pm
SJC
- ORD
1 stop6h 17m
United Airlines
Deal found 2/24![United Airlines logo]()
$415
This Alaska Airlines deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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.
Wed 6/311:26 am
MLI
- SJC
2 stops9h 56m
Alaska Airlines
Mon 6/87:06 am
SJC
- MLI
2 stops14h 46m
Alaska Airlines
Deal found 2/23![Alaska Airlines logo]()
$434
This American Airlines deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/102:54 pm
CMI
- SJC
1 stop8h 27m
American Airlines
Sat 3/146:00 am
SJC
- CMI
1 stop6h 24m
American Airlines
Deal found 2/23![American Airlines logo]()
$536
This Southwest deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 4/166:20 am
STL
- SJC
1 stop5h 40m
Southwest
Sat 4/186:25 am
SJC
- STL
1 stop5h 55m
Southwest
Deal found 2/21![Southwest logo]()
$370
This Delta deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 4/241:24 pm
MDW
- SJC
2 stops10h 37m
Delta
Sun 4/268:20 pm
SJC
- MDW
2 stops10h 26m
Delta
Deal found 2/20![Delta logo]()
$375
This Alaska Airlines deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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.
Thu 4/98:00 am
ORD
- SJC
2 stops16h 59m
Alaska Airlines
Sun 4/126:15 am
SJC
- ORD
1 stop22h 24m
Alaska Airlines
Deal found 2/24![Alaska Airlines logo]()
$440
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 3/237:59 pm
ORD
- SJC
Nonstop5h 00m
United Airlines
Wed 3/2510:55 pm
SJC
- ORD
Nonstop4h 19m
United Airlines
Deal found 2/21![United Airlines logo]()
$442
This Southwest deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 3/254:05 pm
STL
- SJC
2 stops9h 05m
Southwest
Tue 3/319:30 am
SJC
- STL
2 stops8h 25m
Southwest
Deal found 2/22![Southwest logo]()
$370
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 3/219:35 am
MDW
- SJC
2 stops8h 24m
Delta
Tue 3/248:35 pm
SJC
- MDW
2 stops10h 18m
Delta
Deal found 2/21![Delta logo]()
$379
This American Airlines deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 5/2012:12 pm
PIA
- SJC
2 stops12h 44m
American Airlines
Mon 5/257:23 pm
SJC
- PIA
2 stops12h 00m
American Airlines
Deal found 2/24![American Airlines logo]()
$575
This United Airlines deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/103:25 pm
MLI
- SJC
1 stop9h 34m
United Airlines
Sat 3/1410:55 pm
SJC
- MLI
1 stop9h 14m
United Airlines
Deal found 2/23![United Airlines logo]()
$449
This Southwest deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 3/283:35 pm
MDW
- SJC
1 stop7h 25m
Southwest
Tue 3/3110:55 pm
SJC
- MDW
Nonstop4h 05m
Southwest
Deal found 2/22![Southwest logo]()
$384
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 4/142:20 pm
STL
- SJC
2 stops9h 55m
Delta
Thu 4/1611:35 am
SJC
- STL
2 stops10h 50m
Delta
Deal found 2/21![Delta logo]()
$394
Last-minute flights from Illinois to San JoseDiscover last-minute flight deals from Illinois to San Jose. Data last updated February 25, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to San Jose. Data last updated February 25, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/810:47 pm
STL
- SJC
2 stops22h 38m
Frontier
Mon 3/167:42 pm
SJC
- STL
1 stop14h 33m
Frontier
Deal found 2/23![Frontier logo]()
$315
This Kiwi.com deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/118:12 pm
STL
- SJC
2 stops23h 55m
Frontier
Mon 3/167:42 pm
SJC
- STL
1 stop14h 33m
Frontier
Deal found 2/23![Frontier logo]()
$322
This Alaska Airlines deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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.
Wed 3/113:07 pm
ORD
- SJC
1 stop9h 49m
Alaska Airlines
Thu 3/197:00 am
SJC
- ORD
1 stop10h 02m
Alaska Airlines
Deal found 2/22![Alaska Airlines logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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
Mon 3/1610:20 am
SJC
- ORD
1 stop16h 29m
Frontier
Deal found 2/20![Frontier logo]()
$331
This Delta deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/177:15 am
STL
- SJC
1 stop7h 16m
Delta
Wed 3/186:00 am
SJC
- STL
1 stop5h 31m
Delta
Deal found 2/23![Delta logo]()
$303
This Alaska Airlines deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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.
Wed 3/257:00 am
STL
- SJC
1 stop8h 35m
Alaska Airlines
Tue 3/318:00 am
SJC
- STL
1 stop28h 51m
Alaska Airlines
Deal found 2/24![Alaska Airlines logo]()
$263
This Delta deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 3/257:15 am
STL
- SJC
2 stops12h 16m
Delta
Wed 4/111:40 am
SJC
- STL
2 stops10h 41m
Delta
Deal found 2/24![Delta logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 3/258:12 pm
STL
- SJC
2 stops23h 55m
Frontier
Thu 4/27:57 pm
SJC
- STL
1 stop13h 30m
Frontier
Deal found 2/22![Frontier logo]()
$326
This Southwest deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 3/2510:30 am
MDW
- SJC
2 stops8h 35m
Southwest
Mon 3/3010:55 pm
SJC
- MDW
Nonstop4h 05m
Southwest
Deal found 2/22![Southwest logo]()
$328
This Delta deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 3/267:20 am
ORD
- SJC
1 stop7h 11m
Delta
Mon 3/306:25 pm
SJC
- ORD
2 stops12h 45m
Delta
Deal found 2/22![Delta logo]()
$328
This United Airlines deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 3/277:59 pm
ORD
- SJC
Nonstop5h 00m
United Airlines
Wed 4/16:30 am
SJC
- ORD
Nonstop4h 26m
United Airlines
Deal found 2/22![United Airlines logo]()
$330
This American Airlines deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/285:12 am
STL
- SJC
1 stop7h 04m
American Airlines
Tue 3/316:00 am
SJC
- STL
2 stops9h 13m
American Airlines
Deal found 2/23![American Airlines logo]()
$328
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 25, 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 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 4/298:58 pm
ORD
- SJC
1 stop23h 14m
Frontier
Deal found 2/23![Frontier logo]()
$87
This Trip.com deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 4/267:21 pm
ORD
- SJC
1 stop26h 06m
Frontier
Deal found 2/23![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 2/24![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 4/225:09 pm
ORD
- SJC
1 stop27h 03m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$98
This CheapOair deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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.
Wed 4/158:20 am
ORD
- SJC
1 stop7h 38m
Alaska Airlines
Deal found 2/24![Alaska Airlines logo]()
$101
This CheapOair deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 4/74:10 pm
ORD
- SJC
1 stop8h 00m
Alaska Airlines
Deal found 2/23![Alaska Airlines logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 4/237:21 pm
ORD
- SJC
1 stop26h 06m
Frontier
Deal found 2/21![Frontier logo]()
$105
This CheapOair deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 4/148:20 am
ORD
- SJC
1 stop12h 25m
Alaska Airlines
Deal found 2/24![Alaska Airlines logo]()
$106
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 5/76:15 am
MDW
- SJC
2 stops39h 10m
Frontier
Deal found 2/24![Frontier logo]()
$107
This CheapOair deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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.
Sun 5/109:55 pm
STL
- SJC
1 stop22h 07m
Frontier
Deal found 2/23![Frontier logo]()
$107
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 4/303:27 pm
MDW
- SJC
2 stops30h 00m
Frontier
Deal found 2/24![Frontier logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 5/176:15 am
MDW
- SJC
2 stops39h 10m
Frontier
Deal found 2/24![Frontier logo]()
$110
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 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $253 (Delta) |
One-way from | $87 (Kiwi.com) |
Popular in | February |
Cheapest in | January |
Average price | $622 |
Good round-trip deal | $349 or less |
Good one-way deal | $174 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 25, 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
Tue 5/5
2:20 pm-10:15 pm
2 stops9h 55m
San Jose
Tue 5/12
8:45 pm-10:32 am
2 stops11h 47m
$313
ChicagoSan Jose
MDW - SJC
MDWSJC
Chicago Midway
Wed 4/15
3:40 pm-6:15 pm
Nonstop4h 35m
San Jose
Sun 4/19
10:55 pm-5:00 am
Nonstop4h 05m
$332
ChicagoSan Jose
ORD - SJC
ORDSJC
Chicago O'Hare Intl
Fri 6/5
9:00 am-6:21 pm
1 stop11h 21m
San Jose
Mon 6/8
12:59 pm-11:55 pm
1 stop8h 56m
$333
MolineSan Jose
MLI - SJC
MLISJC
Moline Quad-City
Wed 6/3
11:00 am-7:02 pm
1 stop10h 02m
San Jose
Mon 6/8
10:20 pm-10:26 am
1 stop10h 06m
$334
ChicagoSan Jose
MDW - SJC
MDWSJC
Chicago Midway
Thu 3/19
5:40 am-10:20 am
1 stop6h 40m
San Jose
Wed 3/25
6:00 am-4:10 pm
2 stops8h 10m
$338
ChicagoSan Jose
ORD - SJC
ORDSJC
Chicago O'Hare Intl
Wed 3/18
3:45 pm-11:10 pm
2 stops9h 25m
San Jose
Tue 4/7
2:55 pm-10:55 pm
1 stop6h 00m
$338
St. LouisSan Jose
STL - SJC
STLSJC
Lambert-St Louis
Fri 3/27
7:00 am-9:28 am
1 stop28h 28m
San Jose
Tue 3/31
8:00 am-2:51 pm
1 stop28h 51m
$343
ChicagoSan Jose
ORD - SJC
ORDSJC
Chicago O'Hare Intl
Fri 4/24
7:20 pm-11:55 pm
1 stop6h 35m
San Jose
Mon 4/27
1:00 pm-11:55 pm
2 stops8h 55m
$351
ChicagoSan Jose
MDW - SJC
MDWSJC
Chicago Midway
Tue 3/17
10:20 am-3:20 pm
1 stop7h 00m
San Jose
Sun 4/5
9:10 pm-5:40 am
1 stop6h 30m
$352
St. LouisSan Jose
STL - SJC
STLSJC
Lambert-St Louis
Thu 4/16
2:20 pm-10:15 pm
2 stops9h 55m
San Jose
Sat 4/18
6:20 am-2:29 pm
1 stop6h 09m
$356
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
CMI-SJC
SPI-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
CMI-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 $211). 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 25, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 35% 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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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 25, 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 25, 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 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$80 | Average$178 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$142 | Average$198 | 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$540 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$333 | Average$470 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$333 | Average$580 | FlexibilityNo cancel fee | On-time69% |