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Cheap flights from San Jose, California to Illinois from $80

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Jose, California to Illinois departing on 4/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from San Jose, California to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
2:12 pm - 8:23 pm
SJC
-
STL
28h 11m
1 stop
Frontier Logo
12:16 pm - 1:17 pm
STL
-
SJC
27h 01m
1 stop
$196Frontier
Thu, May 7 - Sun, May 10
Frontier Logo
2:12 pm - 8:23 pm
SJC
-
STL
28h 11m
1 stop
Frontier Logo
12:16 pm - 1:17 pm
STL
-
SJC
27h 01m
1 stop
$221Frontier
Thu, May 7 - Sun, May 10
Southwest Logo
1:45 pm - 11:20 pm
SJC
-
MDW
7h 35m
2 stops
Southwest Logo
7:30 am - 1:45 pm
MDW
-
SJC
8h 15m
2 stops
$267Southwest
Tue, Apr 21 - Wed, Apr 22
Southwest Logo
10:55 pm - 5:00 am
SJC
-
MDW
4h 05mnonstop
Southwest Logo
6:15 am - 10:30 am
MDW
-
SJC
6h 15m
1 stop
$271Southwest
Mon, Apr 20 - Mon, Apr 27
United Airlines Logo
3:45 pm - 12:30 am
SJC
-
ORD
6h 45m
1 stop
United Airlines Logo
7:46 pm - 10:41 pm
ORD
-
SJC
4h 55mnonstop
$275United Airlines
Wed, Apr 22 - Tue, Apr 28
Alaska Airlines Logo
2:00 pm - 11:55 pm
SJC
-
ORD
7h 55m
1 stop
Alaska Airlines Logo
6:20 am - 11:24 am
ORD
-
SJC
7h 04m
1 stop
$277Alaska Airlines
Sat, Jun 6 - Wed, Jun 10
Alaska Airlines Logo
5:35 pm - 2:21 pm
SJC
-
ORD
18h 46m
1 stop
Alaska Airlines Logo
8:20 am - 5:38 pm
ORD
-
SJC
11h 18m
1 stop
$278Alaska Airlines
Tue, Apr 14 - Tue, Apr 21
American Airlines Logo
12:46 pm - 11:56 pm
SJC
-
STL
9h 10m
2 stops
American Airlines Logo
5:20 am - 10:07 am
STL
-
SJC
6h 47m
1 stop
$362American Airlines
Wed, May 13 - Sat, May 16
American Airlines Logo
2:02 pm - 11:29 pm
SJC
-
MLI
7h 27m
1 stop
American Airlines Logo
3:48 pm - 9:56 pm
MLI
-
SJC
8h 08m
1 stop
$369American Airlines
Wed, May 6 - Sat, May 9
United Airlines Logo
6:30 am - 5:28 pm
SJC
-
CMI
8h 58m
1 stop
United Airlines Logo
5:45 am - 11:25 am
CMI
-
SJC
7h 40m
1 stop
$450United Airlines
Sat, Aug 15 - Sat, Aug 22

Alaska Airlines flights from San Jose, California to Illinois

Our best Alaska Airlines deals on San Jose, California to Illinois flight tickets
Alaska Airlines
Jun 6
SJC2:00 pmSan Jose
7h 55m
1 stop
ORD11:55 pmChicago O'Hare Intl
Jun 11
ORD2:20 pmChicago O'Hare Intl
6h 51m
1 stop
SJC7:11 pmSan Jose
$277
Alaska Airlines
Apr 14
SJC5:35 pmSan Jose
18h 46m
1 stop
ORD2:21 pmChicago O'Hare Intl
Apr 21
ORD8:20 amChicago O'Hare Intl
11h 18m
1 stop
SJC5:38 pmSan Jose
$278
Alaska Airlines
Jul 21
SJC9:09 amSan Jose
7h 48m
1 stop
ORD6:57 pmChicago O'Hare Intl
Jul 22
ORD6:20 amChicago O'Hare Intl
7h 04m
1 stop
SJC11:24 amSan Jose
$282

Frontier flights from San Jose, California to Illinois

Our best Frontier deals on San Jose, California to Illinois flight tickets
Frontier
May 7
SJC2:12 pmSan Jose
28h 11m
1 stop
STL8:23 pmLambert-St Louis
May 10
STL12:16 pmLambert-St Louis
27h 01m
1 stop
SJC1:17 pmSan Jose
$196
Frontier
May 7
SJC2:12 pmSan Jose
28h 11m
1 stop
STL8:23 pmLambert-St Louis
May 10
STL12:16 pmLambert-St Louis
27h 01m
1 stop
SJC1:17 pmSan Jose
$221
Frontier
May 3
SJC8:22 pmSan Jose
22h 38m
1 stop
STL9:00 pmLambert-St Louis
May 7
STL12:16 pmLambert-St Louis
27h 01m
1 stop
SJC1:17 pmSan Jose
$261

momondo Fare Finder

 
Customize your flight search to find flights from San Jose, California 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, momondo users made 832,500 searches. Data last updated April 1, 2026.
Use the filters below to find and compare flights from San Jose, California to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Thu 5/7

2:12 pm-8:23 pm

1 stop28h 11m

Lambert-St Louis

Sun 5/10

12:16 pm-1:17 pm

1 stop27h 01m

$196

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Thu 5/7

2:12 pm-8:23 pm

1 stop28h 11m

Lambert-St Louis

Sun 5/10

12:16 pm-1:17 pm

1 stop27h 01m

$221

San JoseChicago

SJC - MDW

SJCMDW

San Jose

Tue 4/21

1:45 pm-11:20 pm

2 stops7h 35m

Chicago Midway

Wed 4/22

7:30 am-1:45 pm

2 stops8h 15m

$267
Quickest round-trip

San JoseChicago

SJC - MDW

SJCMDW

San Jose

Mon 4/20

10:55 pm-5:00 am

Nonstop4h 05m

Chicago Midway

Mon 4/27

6:15 am-10:30 am

1 stop6h 15m

$271

San JoseChicago

SJC - ORD

SJCORD

San Jose

Wed 4/22

3:45 pm-12:30 am

1 stop6h 45m

Chicago O'Hare Intl

Tue 4/28

7:46 pm-10:41 pm

Nonstop4h 55m

$275

San JoseChicago

SJC - ORD

SJCORD

San Jose

Sat 6/6

2:00 pm-11:55 pm

1 stop7h 55m

Chicago O'Hare Intl

Wed 6/10

6:20 am-11:24 am

1 stop7h 04m

$277

San JoseChicago

SJC - ORD

SJCORD

San Jose

Tue 4/14

5:35 pm-2:21 pm

1 stop18h 46m

Chicago O'Hare Intl

Tue 4/21

8:20 am-5:38 pm

1 stop11h 18m

$278

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Wed 5/13

12:46 pm-11:56 pm

2 stops9h 10m

Lambert-St Louis

Sat 5/16

5:20 am-10:07 am

1 stop6h 47m

$362

San JoseMoline

SJC - MLI

SJCMLI

San Jose

Wed 5/6

2:02 pm-11:29 pm

1 stop7h 27m

Moline Quad-City

Sat 5/9

3:48 pm-9:56 pm

1 stop8h 08m

$369

San JoseChampaign

SJC - CMI

SJCCMI

San Jose

Sat 8/15

6:30 am-5:28 pm

1 stop8h 58m

Champaign University-Willard

Sat 8/22

5:45 am-11:25 am

1 stop7h 40m

$450

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from San Jose, California to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from San Jose, California is in February. Flight prices, which tend to average around $390, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $396.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from San Jose, California to Illinois is on a Wednesday when prices can be found for as low as $444. Flights from San Jose, California to Illinois on a Sunday will generally be more expensive and average around $548. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from San Jose, California to Illinois during this time can be as low as $407. Flights in the evening are often more expensive with an average ticket price of $527.

What is the cheapest San Jose to Illinois flight route?

Fly from San Jose to Chicago O'Hare Intl for the best San Jose - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from San Jose, California when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $460 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from San Jose, California for as low as $308 on momondo.

What cabin class options are available on San Jose to Illinois flights?

There are 4 cabin classes available to choose from on San Jose to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on San Jose, California to Illinois flights?

No. A direct flight is the cheapest option for a flight between San Jose, California to Illinois.

Cheap San Jose, California to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Jose, California to Illinois

Best Price Found

$228

Fastest flight time

4h 00m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from San Jose, California in the past 72 hours is $228. The best round-trip flight deal from San Jose, California to Illinois found on momondo in the last 72 hours is $387.
The fastest flight from San Jose, California to Illinois takes 4h 00m
Direct flights go from San Jose, California to Illinois every day.
There are 98 airports in Illinois. From San Jose, California there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW).
Search flight deals

  • When did momondo last update prices for flights from San Jose Airport to Illinois?

    Prices for flights from San Jose Airport to Illinois are updated daily.

  • How many operators does momondo search for flights from San Jose Airport to Illinois?

  • How old do you have to be to fly from San Jose Airport to Illinois?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Jose Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from San Jose, California to Illinois?

Best airlines flying from San Jose, California to Illinois

Compare and see reviews for airlines that fly from San Jose, California to Illinois with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $121Free CancellationRating
6.3
8,572 reviews
Search Spirit Airlines flights
FrontierPriceFrom $131Free CancellationRating
5.7
3,006 reviews
Search Frontier flights
Alaska AirlinesPriceFrom $170Free CancellationRating
7.9
12,149 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $200Free CancellationRating
7.1
11,546 reviews
Search American Airlines flights
DeltaPriceFrom $208Free CancellationRating
7.9
8,366 reviews
Search Delta flights
United AirlinesPriceFrom $280Free CancellationRating
7.4
9,533 reviews
Search United Airlines flights
SouthwestPriceFrom $330Free CancellationRating
8.0
4,336 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from San Jose to Illinois?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from San Jose to Illinois. momondo saves you time and could save you money on your trip.

Can I find flights from San Jose to Illinois with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Illinois from San Jose with this policy.

How can momondo help me find flights from San Jose to Illinois?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Jose to Illinois.

I’m not ready to book a flight from San Jose to Illinois right now. Can momondo alert me if prices change?

Price alerts on flights to Illinois from San Jose are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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