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Cheap flights from San Jose, California to Illinois from $75

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 2/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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
10:37 am - 8:50 pm
SJC
-
STL
8h 13m1 stop
Frontier Logo
7:39 pm - 12:09 pm
STL
-
SJC
42h 30m2 stops
$202Frontier
Mon, Jan 26 - Fri, Jan 30
Multiple Airlines Logo
10:37 am - 8:50 pm
SJC
-
STL
8h 13m1 stop
Multiple Airlines Logo
2:50 pm - 2:42 pm
STL
-
SJC
25h 52m1 stop
$263Multiple Airlines
Mon, Jan 26 - Fri, Jan 30
Delta Logo
7:45 am - 9:38 pm
SJC
-
STL
11h 53m2 stops
Delta Logo
6:35 am - 5:40 pm
STL
-
SJC
13h 05m2 stops
$286Delta
Mon, Jan 26 - Fri, Jan 30
Delta Logo
11:45 am - 11:25 pm
SJC
-
STL
9h 40m2 stops
Delta Logo
6:35 am - 5:40 pm
STL
-
SJC
13h 05m2 stops
$306Delta
Thu, Feb 5 - Tue, Feb 10
American Airlines Logo
6:00 am - 3:50 pm
SJC
-
PIA
7h 50m1 stop
American Airlines Logo
7:00 am - 1:42 pm
PIA
-
SJC
8h 42m1 stop
$379American Airlines
Sat, Jan 17 - Thu, Jan 22
Southwest Logo
8:40 am - 4:35 pm
SJC
-
MDW
5h 55m1 stop
Southwest Logo
9:00 pm - 11:45 pm
MDW
-
SJC
4h 45mnonstop
$383Southwest
Wed, Feb 4 - Wed, Apr 1
American Airlines Logo
6:00 am - 3:50 pm
SJC
-
PIA
7h 50m1 stop
American Airlines Logo
7:39 am - 6:43 pm
PIA
-
SJC
13h 04m2 stops
$384American Airlines
Sat, Jan 17 - Thu, Jan 22
Southwest Logo
8:40 am - 4:35 pm
SJC
-
MDW
5h 55m1 stop
Southwest Logo
10:30 am - 3:50 pm
MDW
-
SJC
7h 20m1 stop
$392Southwest
Wed, Jan 14 - Sun, Jan 18
United Airlines Logo
8:40 am - 8:47 pm
SJC
-
PIA
10h 07m1 stop
United Airlines Logo
8:35 am - 1:39 pm
PIA
-
SJC
7h 04m1 stop
$528United Airlines
Sat, Jan 17 - Sun, Jan 18
United Airlines Logo
4:00 pm - 8:34 pm
SJC
-
MLI
26h 34m1 stop
United Airlines Logo
8:46 am - 1:38 pm
MLI
-
SJC
6h 52m1 stop
$528United Airlines
Wed, Jan 7 - Sat, Jan 10

Alaska Airlines flights from San Jose, California to Illinois

Our best Alaska Airlines deals on San Jose, California to Illinois flight tickets
Alaska Airlines
Jan 16
SJC3:36 pmSan Jose
30h 14m
1 stop
ORD11:50 pmChicago O'Hare Intl
Jan 19
ORD2:06 pmChicago O'Hare Intl
25h 02m
2 stops
SJC1:08 pmSan Jose
$348
Find similar
Alaska Airlines
Dec 31
SJC7:00 amSan Jose
11h 02m
1 stop
ORD8:02 pmChicago O'Hare Intl
Jan 7
ORD3:35 pmChicago O'Hare Intl
19h 46m
2 stops
SJC9:21 amSan Jose
$350
Find similar
Alaska Airlines
Jan 1
SJC7:05 amSan Jose
19h 57m
1 stop
ORD5:02 amChicago O'Hare Intl
Jan 5
ORD6:00 amChicago O'Hare Intl
29h 22m
1 stop
SJC9:22 amSan Jose
$358
Find similar

Delta flights from San Jose, California to Illinois

Our best Delta deals on San Jose, California to Illinois flight tickets
Delta
Jan 26
SJC7:45 amSan Jose
11h 53m
2 stops
STL9:38 pmLambert-St Louis
Jan 30
STL6:35 amLambert-St Louis
13h 05m
2 stops
SJC5:40 pmSan Jose
$286
Find similar
Delta
Jan 10
SJC2:06 pmSan Jose
7h 33m
1 stop
STL11:39 pmLambert-St Louis
Jan 17
STL6:00 amLambert-St Louis
13h 40m
2 stops
SJC5:40 pmSan Jose
$307
Find similar
Delta
Jan 10
SJC11:45 amSan Jose
9h 40m
2 stops
STL11:25 pmLambert-St Louis
Jan 17
STL6:00 amLambert-St Louis
13h 40m
2 stops
SJC5:40 pmSan Jose
$315
Find similar

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 December 11, 2025.
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

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Mon 1/26

10:37 am-8:50 pm

1 stop8h 13m

Lambert-St Louis

Fri 1/30

7:39 pm-12:09 pm

2 stops42h 30m

$202

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Mon 1/26

10:37 am-8:50 pm

1 stop8h 13m

Lambert-St Louis

Fri 1/30

2:50 pm-2:42 pm

1 stop25h 52m

$263

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Mon 1/26

7:45 am-9:38 pm

2 stops11h 53m

Lambert-St Louis

Fri 1/30

6:35 am-5:40 pm

2 stops13h 05m

$286

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Thu 2/5

11:45 am-11:25 pm

2 stops9h 40m

Lambert-St Louis

Tue 2/10

6:35 am-5:40 pm

2 stops13h 05m

$306

San JosePeoria

SJC - PIA

SJCPIA

San Jose

Sat 1/17

6:00 am-3:50 pm

1 stop7h 50m

Greater Peoria

Thu 1/22

7:00 am-1:42 pm

1 stop8h 42m

$379

San JoseChicago

SJC - MDW

SJCMDW

San Jose

Wed 2/4

8:40 am-4:35 pm

1 stop5h 55m

Chicago Midway

Wed 4/1

9:00 pm-11:45 pm

Nonstop4h 45m

$383

San JosePeoria

SJC - PIA

SJCPIA

San Jose

Sat 1/17

6:00 am-3:50 pm

1 stop7h 50m

Greater Peoria

Thu 1/22

7:39 am-6:43 pm

2 stops13h 04m

$384

San JoseChicago

SJC - MDW

SJCMDW

San Jose

Wed 1/14

8:40 am-4:35 pm

1 stop5h 55m

Chicago Midway

Sun 1/18

10:30 am-3:50 pm

1 stop7h 20m

$392

San JosePeoria

SJC - PIA

SJCPIA

San Jose

Sat 1/17

8:40 am-8:47 pm

1 stop10h 07m

Greater Peoria

Sun 1/18

8:35 am-1:39 pm

1 stop7h 04m

$528

San JoseMoline

SJC - MLI

SJCMLI

San Jose

Wed 1/7

4:00 pm-8:34 pm

1 stop26h 34m

Moline Quad-City

Sat 1/10

8:46 am-1:38 pm

1 stop6h 52m

$528

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 January. Flight prices, which tend to average around $308, 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 January, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $387.

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 Tuesday when prices can be found for as low as $439. Flights from San Jose, California to Illinois on a Sunday will generally be more expensive and average around $534. 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 $433. Flights in the evening are often more expensive with an average ticket price of $738.

What is the cheapest San Jose to Illinois flight route?

Fly from San Jose to Chicago Midway 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 $458 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 $262 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

$131

Fastest flight time

4h 05m

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 $131. The best round-trip flight deal from San Jose, California to Illinois found on momondo in the last 72 hours is $467.
The fastest flight from San Jose, California to Illinois takes 4h 05m
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
FrontierPriceFrom $98Free CancellationRating
5.8
3,084 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $125Free CancellationRating
6.3
8,175 reviews
Search Spirit Airlines flights
Alaska AirlinesPriceFrom $170Free CancellationRating
8.0
11,431 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $200Free CancellationRating
7.2
11,049 reviews
Search American Airlines flights
DeltaPriceFrom $256Free CancellationRating
7.9
8,005 reviews
Search Delta flights
United AirlinesPriceFrom $287Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
SouthwestPriceFrom $330Free CancellationRating
7.9
4,252 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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