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San Jose

$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 1/29. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SJC
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Illinois to San Jose

Cheapest flights from Illinois to San Jose
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 December 18, 2025.

This Delta deal was found by Cheapflights users on 12/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:20 amSTL - SJC
1 stop7h 21mDelta
Wed 1/77:45 amSJC - STL
2 stops13h 40mDelta
Deal found 12/16$317
This CheapOair deal was found by Cheapflights users on 12/15. 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.
Wed 12/245:19 pmSTL - SJC
1 stop27h 29mFrontier
Sun 1/43:27 pmSJC - STL
1 stop27h 58mFrontier
Deal found 12/15$354
This Delta deal was found by Cheapflights users on 12/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:20 amSTL - SJC
1 stop7h 21mDelta
Thu 1/85:54 amSJC - STL
1 stop6h 54mDelta
Deal found 12/16$360
This Delta deal was found by Cheapflights users on 12/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:20 amSTL - SJC
1 stop7h 21mDelta
Tue 1/135:54 amSJC - STL
1 stop6h 54mDelta
Deal found 12/16$361
This Delta deal was found by Cheapflights users on 12/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:20 amSTL - SJC
1 stop7h 21mDelta
Sun 1/112:06 pmSJC - STL
1 stop7h 33mDelta
Deal found 12/16$371
This Delta deal was found by Cheapflights users on 12/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:20 amSTL - SJC
1 stop7h 21mDelta
Sat 1/1011:45 amSJC - STL
2 stops9h 40mDelta
Deal found 12/16$378
This Southwest deal was found by Cheapflights users on 12/16. 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.
Thu 12/252:40 pmSTL - SJC
1 stop8h 20mSouthwest
Sat 1/109:30 amSJC - STL
1 stop5h 25mSouthwest
Deal found 12/16$394
This Southwest deal was found by Cheapflights users on 12/15. 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.
Wed 12/241:45 pmSTL - SJC
1 stop6h 15mSouthwest
Wed 12/317:00 amSJC - STL
2 stops8h 20mSouthwest
Deal found 12/15$399
This American Airlines deal was found by Cheapflights users on 12/16. 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 12/203:21 pmMLI - SJC
1 stop7h 52mAmerican Airlines
Tue 1/611:51 amSJC - MLI
1 stop8h 07mAmerican Airlines
Deal found 12/16$407
This American Airlines deal was found by Cheapflights users on 12/16. 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.
Fri 12/193:21 pmMLI - SJC
1 stop7h 52mAmerican Airlines
Tue 1/66:00 amSJC - MLI
1 stop7h 27mAmerican Airlines
Deal found 12/16$414
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Mon 12/227:43 pmSTL - SJC
2 stops23h 59mFrontier
Sun 1/1111:27 amSJC - STL
1 stop22h 45mFrontier
Deal found 12/16$414
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Mon 12/227:43 pmSTL - SJC
2 stops23h 59mFrontier
Thu 1/811:27 amSJC - STL
1 stop22h 45mFrontier
Deal found 12/16$416

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 December 18, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$183
(CheapOair)

One-way from

$81
(CheapTickets)

Popular in

December

Cheapest in

February

Average price

$493

Good round-trip deal

$397 or less

Good one-way deal

$267 or less
Provider with most accurate pricing for Chicago (CHI)-San Jose flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-San Jose flights.
Search Deals
From Illinois to San Jose
Search Deals
One-way flight from Illinois to San Jose
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($8 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Illinois to San Jose.
Search Deals
Price to beat on a one-way flight from Illinois to San Jose.
Search Deals

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 December 18, 2025.
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 2/5

10:01 pm-8:40 am

1 stop12h 39m

San Jose

Mon 2/9

10:37 am-8:50 pm

1 stop8h 13m

$183

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Mon 1/12

3:44 pm-12:09 pm

1 stop22h 25m

San Jose

Sat 1/17

5:45 pm-2:29 pm

1 stop18h 44m

$252

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Thu 2/19

3:54 pm-9:22 am

1 stop19h 28m

San Jose

Sat 2/21

7:00 am-11:59 pm

1 stop14h 59m

$262

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Wed 1/28

9:00 am-10:35 pm

1 stop15h 35m

San Jose

Mon 2/2

9:05 am-11:50 pm

1 stop12h 45m

$262

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Fri 1/9

9:00 am-12:09 pm

1 stop29h 09m

San Jose

Fri 1/23

10:29 am-2:29 pm

1 stop26h 00m

$272

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Wed 1/14

6:35 am-5:40 pm

2 stops13h 05m

San Jose

Wed 1/28

7:45 am-9:38 pm

2 stops11h 53m

$274

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Fri 1/9

3:44 pm-12:09 pm

1 stop22h 25m

San Jose

Sun 1/11

8:04 pm-2:29 pm

1 stop16h 25m

$281

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Sat 1/31

8:00 am-4:37 pm

2 stops10h 37m

San Jose

Sat 2/7

12:46 pm-11:37 pm

1 stop8h 51m

$288

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Thu 1/15

3:44 pm-10:35 pm

1 stop8h 51m

San Jose

Thu 1/22

11:00 am-11:50 pm

1 stop10h 50m

$290

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Sun 1/18

9:00 am-5:34 pm

1 stop10h 34m

San Jose

Sun 1/25

7:00 am-11:37 pm

1 stop14h 37m

$300

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 60 results
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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.
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

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 November is currently the most expensive (average of $207). 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 December 18, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 10% on flights from Illinois to San Jose, California by exploring options for tickets in the evening.

What is the cheapest day to fly from Illinois to San Jose, California?

Use this chart to determine the cheapest time to fly round-trip from Illinois to San Jose. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to San Jose, California flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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.

  • What airport do you fly into for flights to San Jose from Illinois?

    For a flight from Illinois to San Jose, you will be flying into San Jose. San Jose (SJC) is just 2.9 mi from the center of the city.

  • How long is the flight from Illinois to San Jose, California?

    Departing from Illinois to San Jose, California will take you 12h 39m. Illinois and San Jose, California are separated by a distance of 1710 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Illinois to San Jose, California one-way?

    One-way options have recently been found by users for as low as $58 on Spirit Airlines. Other airlines that offer cheap prices include American Airlines from $64 and Frontier from $66 one-way.

  • What are the most popular routes from Illinois to San Jose, California?

    The most popular flight routes from Illinois to San Jose, California are Chicago O'Hare Intl - San Jose, Chicago Midway - San Jose and Lambert-St Louis - San Jose.

  • What are the cheapest flights from Illinois to San Jose, California?

    On average you can expect to pay $400 for a flight from Illinois to San Jose, California. The cheapest flight overall is $238 while the most popular route, (Chicago O'Hare Intl - San Jose) is currently priced at $228.

  • Can I find deals for flights from Illinois to San Jose that include hotel bookings?

    Yes. In addition to deals on Illinois to San Jose flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to San Jose?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to San Jose.

  • Can I find deals for business class flights from Illinois to San Jose?

    Yes. Cheapflights offers flight deals from Illinois to San Jose by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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 November is currently the most expensive (average of $207). 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.

See more FAQs

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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$80Average$222FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$142Average$201FlexibilityNo cancel feeOn-time65%
DeltaCheapest$189Average$363FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$262Average$361FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$288Average$551FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$524FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$333Average$479FlexibilityNo cancel feeOn-time63%

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