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$115+ 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 6/30. Fares are subject to change and may not be available on all flights or dates of travel.
SJC — ORD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$239
(Mytrip)

One-way from

$115
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$456

Good round-trip deal

$389 or less

Good one-way deal

$207 or less
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. 6% 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 June 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 June 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/2411:01 amSJC - ORD
2 stops17h 50mSpirit Airlines
Tue 7/11:43 pmORD - SJC
2 stops22h 23mSpirit Airlines
Deal found 6/10$239
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:00 amSJC - RFD
1 stop10h 52mMultiple Airlines
Sun 9/218:37 pmRFD - SJC
1 stop14h 47mMultiple Airlines
Deal found 6/10$250
This Delta deal was found by Cheapflights users on 6/11. 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 8/57:25 amSJC - ORD
1 stop7h 55mDelta
Tue 8/127:15 amORD - SJC
1 stop8h 34mDelta
Deal found 6/11$255
This Mytrip deal was found by Cheapflights users on 6/12. 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.
Sun 9/1410:19 amSJC - STL
2 stops19h 30mSpirit Airlines
Fri 9/198:44 amSTL - SJC
2 stops40h 33mSpirit Airlines
Deal found 6/12$277
This KAYAK deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1112:17 pmSJC - ORD
1 stop9h 36mFrontier
Sun 9/146:00 amORD - SJC
1 stop7h 32mFrontier
Deal found 6/11$295
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/38:00 amSJC - STL
1 stop7h 34mAlaska Airlines
Wed 9/176:00 amSTL - SJC
1 stop7h 57mAlaska Airlines
Deal found 6/10$296
This Southwest deal was found by Cheapflights users on 6/11. 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.
Mon 8/112:55 pmSJC - STL
1 stop6h 30mSouthwest
Tue 8/194:45 pmSTL - SJC
1 stop6h 20mSouthwest
Deal found 6/11$297
This Mytrip deal was found by Cheapflights users on 6/11. 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 9/1112:17 pmSJC - MDW
1 stop8h 21mFrontier
Sun 9/147:56 pmMDW - SJC
1 stop17h 36mFrontier
Deal found 6/11$299
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 10/228:00 amSJC - ORD
1 stop13h 59mAlaska Airlines
Sun 10/267:55 pmORD - SJC
1 stop18h 06mAlaska Airlines
Deal found 6/11$299
This American Airlines deal was found by Cheapflights users on 6/11. 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 10/2912:52 pmSJC - STL
2 stops8h 57mAmerican Airlines
Tue 11/44:07 pmSTL - SJC
1 stop6h 36mAmerican Airlines
Deal found 6/11$302
This Booking.com deal was found by Cheapflights users on 6/10. 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.
Thu 6/197:00 pmSJC - ORD
1 stop23h 56mMultiple Airlines
Tue 6/2410:15 pmORD - SJC
1 stop13h 51mMultiple Airlines
Deal found 6/10$316
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/99:44 amSJC - STL
1 stop6h 03mDelta
Tue 9/163:30 pmSTL - SJC
1 stop7h 30mDelta
Deal found 6/10$319

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 June 12, 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 JoseChicago

SJC - ORD

SJCORD

San Jose

Tue 6/24

11:01 am-6:51 am

2 stops17h 50m

Chicago O'Hare Intl

Tue 7/1

1:43 pm-10:06 am

2 stops22h 23m

$239

San JoseChicago

SJC - ORD

SJCORD

San Jose

Tue 8/5

7:25 am-5:20 pm

1 stop7h 55m

Chicago O'Hare Intl

Tue 8/12

7:15 am-1:49 pm

1 stop8h 34m

$255

San JoseChicago

SJC - RFD

SJCRFD

San Jose

Wed 7/9

6:30 am-11:54 am

1 stop27h 24m

Chicago Greater Rockford

Sun 7/13

12:44 pm-3:27 pm

2 stops28h 43m

$258

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Sun 9/14

10:19 am-7:49 am

2 stops19h 30m

Lambert-St Louis

Fri 9/19

8:44 am-11:17 pm

2 stops40h 33m

$277

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Wed 9/3

8:00 am-5:34 pm

1 stop7h 34m

Lambert-St Louis

Wed 9/17

6:00 am-11:57 am

1 stop7h 57m

$296

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Mon 8/11

2:55 pm-11:25 pm

1 stop6h 30m

Lambert-St Louis

Tue 8/19

4:45 pm-9:05 pm

1 stop6h 20m

$297

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Wed 10/29

12:52 pm-11:49 pm

2 stops8h 57m

Lambert-St Louis

Tue 11/4

4:07 pm-8:43 pm

1 stop6h 36m

$302

San JoseChicago

SJC - ORD

SJCORD

San Jose

Thu 6/19

7:00 pm-8:56 pm

1 stop23h 56m

Chicago O'Hare Intl

Thu 6/26

10:15 pm-10:06 am

1 stop13h 51m

$302

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Tue 9/9

9:44 am-5:47 pm

1 stop6h 03m

Lambert-St Louis

Tue 9/16

3:30 pm-9:00 pm

1 stop7h 30m

$319

San JoseChicago

SJC - MDW

SJCMDW

San Jose

Tue 8/12

6:25 am-5:37 pm

1 stop9h 12m

Chicago Midway

Wed 8/20

12:43 pm-7:47 pm

1 stop9h 04m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 55 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 June 12, 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.

Weekly flight availability from San Jose to Illinois

Explore weekly flight availability from San Jose to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 12, 2025.

The most flights from SJC to USIL are scheduled on a Monday (2 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).

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 June 12, 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
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 Spirit Airlines ($115), Frontier ($125), and Delta ($136).

  • 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 $669, our data shows the cheapest flight currently is $169. When looking at the most popular route, (San Jose - Chicago O'Hare Intl), you can expect to pay $172 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$98Average$248FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$124Average$265FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$170Average$243FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$212Average$473FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$234Average$528FlexibilityNo cancel feeOn-time71%
DeltaCheapest$236Average$353FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$358Average$498FlexibilityNo cancel feeOn-time63%

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