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$106+ Cheap flights from San Jose (SJC) to Illinois

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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
SJC — ORD
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
1 adult, Economy
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Cheap flight deals from San Jose to Illinois

Keep the following information in mind while searching for San Jose to Illinois flight deals. Data was last updated April 15, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$190
(CheapOair)

One-way from

$106
(CheapOair)

Popular in

June

Cheapest in

January

Average price

$434

Good round-trip deal

$403 or less

Good one-way deal

$191 or less
Provider with most accurate pricing for San Jose-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for San Jose-Chicago (CHI) flights.
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From San Jose to Illinois
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One-way flight from San Jose to Illinois
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Highest demand for flights based on searches. 7% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from San Jose to Illinois.
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Price to beat on a one-way flight from San Jose to Illinois.
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Find flight deals from San Jose to Illinois

Cheapest flights from San Jose to Illinois
Explore the most affordable flight options available from San Jose to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 15, 2025.

This CheapOair deal was found by Cheapflights users on 4/15. 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.
Thu 5/1512:04 pmSJC - STL
1 stop19h 05mFrontier
Wed 5/218:15 pmSTL - SJC
1 stop17h 06mFrontier
Deal found 4/15$191
This Trip.com deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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.
Fri 5/96:00 amSJC - STL
1 stop13h 05mMultiple Airlines
Sun 5/119:55 pmSTL - SJC
1 stop22h 46mMultiple Airlines
Deal found 4/13$229
This Alaska Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/31:00 pmSJC - STL
1 stop8h 56mAlaska Airlines
Thu 11/67:00 amSTL - SJC
1 stop9h 10mAlaska Airlines
Deal found 4/15$256
This Delta deal was found by Cheapflights users on 4/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1012:26 pmSJC - MLI
1 stop8h 31mDelta
Tue 5/135:15 pmMLI - SJC
1 stop7h 45mDelta
Deal found 4/15$257
This Delta deal was found by Cheapflights users on 4/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/310:20 pmSJC - STL
1 stop7h 50mDelta
Fri 11/711:51 amSTL - SJC
1 stop10h 13mDelta
Deal found 4/15$257
This Southwest deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/244:30 pmSJC - STL
1 stop5h 50mSouthwest
Sat 7/123:25 pmSTL - SJC
2 stops7h 55mSouthwest
Deal found 4/14$262
This Booking.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/3011:00 amSJC - ORD
1 stop16h 25mSpirit Airlines
Tue 6/311:50 amORD - SJC
1 stop13h 39mSpirit Airlines
Deal found 4/14$263
This Trip.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1912:20 pmSJC - ORD
1 stop9h 21mMultiple Airlines
Thu 5/226:10 amORD - SJC
2 stops19h 19mMultiple Airlines
Deal found 4/14$269
This Frontier deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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.
Mon 4/143:58 pmSJC - MDW
1 stop6h 23mFrontier
Fri 4/186:45 amMDW - SJC
1 stop10h 14mFrontier
Deal found 4/13$270
This Frontier deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/143:58 pmSJC - ORD
1 stop6h 39mFrontier
Fri 4/186:40 amORD - SJC
1 stop10h 19mFrontier
Deal found 4/14$270
This Mytrip deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/86:00 amSJC - RFD
1 stop12h 46mMultiple Airlines
Sun 5/119:36 pmRFD - SJC
2 stops18h 52mMultiple Airlines
Deal found 4/14$271
This American Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 4/302:19 pmSJC - STL
1 stop6h 09mAmerican Airlines
Tue 5/65:19 amSTL - SJC
2 stops8h 39mAmerican Airlines
Deal found 4/13$312

Cheapflights Fare Finder

Customize your flight search to find flights from San Jose to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 15, 2025.
Use the filters below to find and compare flights from San Jose to Illinois that are best for you.

Fly from

San Jose

Fly to

Illinois

Route

Depart

Return

Price

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Thu 5/15

12:04 pm-9:09 am

1 stop19h 05m

Lambert-St Louis

Wed 5/21

8:15 pm-11:21 am

1 stop17h 06m

$190

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Fri 5/9

6:00 am-9:05 pm

1 stop13h 05m

Lambert-St Louis

Sun 5/11

9:55 pm-6:41 pm

1 stop22h 46m

$229

San JoseMoline

SJC - MLI

SJCMLI

San Jose

Sat 5/10

12:26 pm-10:57 pm

1 stop8h 31m

Moline Quad-City

Tue 5/13

5:15 pm-11:00 pm

1 stop7h 45m

$257

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Sun 5/18

10:25 pm-9:00 am

1 stop8h 35m

Lambert-St Louis

Tue 5/20

7:30 am-11:48 am

1 stop6h 18m

$257

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Tue 6/24

4:30 pm-12:20 am

1 stop5h 50m

Lambert-St Louis

Sat 7/12

3:25 pm-9:20 pm

2 stops7h 55m

$262

San JoseChicago

SJC - ORD

SJCORD

San Jose

Fri 5/30

11:00 am-5:25 am

1 stop16h 25m

Chicago O'Hare Intl

Tue 6/3

11:50 am-11:29 pm

1 stop13h 39m

$263

San JoseChicago

SJC - ORD

SJCORD

San Jose

Mon 5/19

12:20 pm-11:41 pm

1 stop9h 21m

Chicago O'Hare Intl

Thu 5/22

6:10 am-11:29 pm

2 stops19h 19m

$269

San JoseChicago

SJC - ORD

SJCORD

San Jose

Fri 4/18

3:49 pm-12:37 am

1 stop6h 48m

Chicago O'Hare Intl

Mon 4/21

6:40 am-2:58 pm

1 stop10h 18m

$270

San JoseChicago

SJC - RFD

SJCRFD

San Jose

Thu 5/8

6:00 am-8:46 pm

1 stop12h 46m

Chicago Greater Rockford

Sun 5/11

9:36 pm-2:28 pm

2 stops18h 52m

$271

San JoseChicago

SJC - MDW

SJCMDW

San Jose

Thu 5/22

2:33 pm-3:00 pm

1 stop22h 27m

Chicago Midway

Mon 5/26

6:25 am-1:43 pm

1 stop9h 18m

$280

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 60 results
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Best time to book a flight from San Jose to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from San Jose 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 San Jose to Illinois

What is the cheapest month to book a flight from San Jose to Illinois?

Currently, August is the cheapest month in which you can book a flight from San Jose to Illinois (average of $245). Flying from San Jose to Illinois in March is currently the most expensive (average of $321). 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 SJC to IL?

Find hourly flight availability from San Jose to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 15, 2025.

When flying from San Jose to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated April 15, 2025.
Read through reviews of airlines operating flights from San Jose to Illinois, such as Alaska Airlines, Southwest and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,876 reviews

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,876 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,279 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,374 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,658 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from San Jose to Illinois. 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 from for flights from San Jose to Illinois?

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

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

    The cheapest airlines for a one-way flight from San Jose to Illinois are Frontier ($106), Southwest ($124), and Spirit Airlines ($128).

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

    The most popular route from San Jose to Illinois is San Jose - Chicago O'Hare Intl. You may also consider San Jose - Chicago Midway or San Jose - Lambert-St Louis.

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

    While on average a flight from San Jose to Illinois is generally $915, our data shows the cheapest flight currently is $163. When looking at the most popular route, (San Jose - Chicago O'Hare Intl), you can expect to pay $189 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Jose to Illinois 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 San Jose to Illinois?

    Currently, August is the cheapest month in which you can book a flight from San Jose to Illinois (average of $245). Flying from San Jose to Illinois in March is currently the most expensive (average of $321). 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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Alternative routes for San Jose to Illinois

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Top 7 airlines flying from San Jose to Illinois

Discover the top 7 airlines that operate flights from San Jose to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$98Average$252FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$134Average$265FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$197Average$297FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$203Average$465FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$234Average$491FlexibilityNo cancel feeOn-time71%
DeltaCheapest$236Average$501FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$358Average$503FlexibilityNo cancel feeOn-time63%

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