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Cheap flights from San José to Illinois from $142

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 José to Illinois departing on 3/4. 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 José to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:35 pm - 10:27 pm
SJO
-
STL
9h 52m
1 stop
Multiple Airlines Logo
4:51 pm - 10:40 am
STL
-
SJO
18h 49m
1 stop
$278Multiple Airlines
Wed, Mar 4 - Mon, Mar 9
Multiple Airlines Logo
12:35 pm - 10:27 pm
SJO
-
STL
9h 52m
1 stop
Multiple Airlines Logo
4:51 pm - 10:40 am
STL
-
SJO
18h 49m
1 stop
$281Multiple Airlines
Wed, Mar 4 - Tue, Mar 10
Multiple Airlines Logo
1:31 pm - 6:51 am
SJO
-
STL
17h 20m
2 stops
Multiple Airlines Logo
3:49 pm - 11:40 am
STL
-
SJO
19h 51m
1 stop
$284Multiple Airlines
Thu, Feb 19 - Tue, Feb 24
United Airlines Logo
12:35 pm - 7:46 am
SJO
-
ORD
19h 11m
1 stop
United Airlines Logo
7:39 am - 12:56 pm
ORD
-
SJO
5h 17mnonstop
$300United Airlines
Thu, Feb 19 - Sun, Feb 22
Copa Airlines Logo
11:01 am - 12:04 am
SJO
-
ORD
13h 03m
1 stop
Copa Airlines Logo
2:22 pm - 4:46 pm
ORD
-
SJO
26h 24m
3 stops
$302Copa Airlines
Thu, Feb 19 - Sun, Feb 22
Delta Logo
7:00 am - 5:45 pm
SJO
-
MDW
10h 45m
1 stop
Delta Logo
9:34 am - 10:02 pm
MDW
-
SJO
12h 28m
2 stops
$302Delta
Thu, Feb 19 - Sun, Feb 22
Spirit Airlines Logo
12:19 pm - 11:17 pm
SJO
-
ORD
9h 58m
1 stop
Spirit Airlines Logo
5:05 am - 11:14 am
ORD
-
SJO
7h 09m
1 stop
$303Spirit Airlines
Tue, Mar 24 - Tue, Apr 7
Spirit Airlines Logo
12:31 pm - 7:59 am
SJO
-
ORD
18h 28m
2 stops
Spirit Airlines Logo
5:15 am - 11:22 am
ORD
-
SJO
7h 07m
1 stop
$304Spirit Airlines
Tue, Apr 21 - Tue, Apr 28
Multiple Airlines Logo
1:31 pm - 6:51 am
SJO
-
STL
17h 20m
2 stops
Multiple Airlines Logo
3:49 pm - 11:40 am
STL
-
SJO
19h 51m
1 stop
$304Multiple Airlines
Tue, Feb 17 - Tue, Feb 24
American Airlines Logo
8:00 am - 4:14 pm
SJO
-
ORD
8h 14m
1 stop
American Airlines Logo
3:10 pm - 8:12 pm
ORD
-
SJO
5h 02mnonstop
$305American Airlines
Thu, Feb 19 - Tue, Feb 24

Spirit Airlines flights from San José to Illinois

Our best Spirit Airlines deals on San José to Illinois flight tickets
Spirit Airlines
Mar 3
SJO12:35 pmSan José Juan Santamaria Intl
11h 12m
2 stops
ORD11:47 pmChicago O'Hare Intl
Mar 8
ORD8:16 pmChicago O'Hare Intl
15h 24m
2 stops
SJO10:40 amSan José Juan Santamaria Intl
$308
Spirit Airlines
Mar 9
SJO12:31 pmSan José Juan Santamaria Intl
10h 16m
1 stop
ORD11:47 pmChicago O'Hare Intl
Mar 12
ORD5:05 amChicago O'Hare Intl
7h 09m
1 stop
SJO11:14 amSan José Juan Santamaria Intl
$309
Spirit Airlines
Mar 4
SJO12:35 pmSan José Juan Santamaria Intl
11h 12m
2 stops
ORD11:47 pmChicago O'Hare Intl
Mar 8
ORD4:43 pmChicago O'Hare Intl
18h 57m
2 stops
SJO10:40 amSan José Juan Santamaria Intl
$318

Air Canada flights from San José to Illinois

Our best Air Canada deals on San José to Illinois flight tickets
Air Canada
Feb 9
SJO8:50 amSan José Juan Santamaria Intl
11h 20m
1 stop
ORD8:10 pmChicago O'Hare Intl
Feb 15
ORD7:15 amChicago O'Hare Intl
16h 00m
1 stop
SJO11:15 pmSan José Juan Santamaria Intl
$335
Air Canada
Feb 8
SJO8:35 amSan José Juan Santamaria Intl
11h 08m
1 stop
ORD7:43 pmChicago O'Hare Intl
Feb 22
ORD7:15 amChicago O'Hare Intl
16h 00m
1 stop
SJO11:15 pmSan José Juan Santamaria Intl
$338
Air Canada
Feb 8
SJO8:35 amSan José Juan Santamaria Intl
11h 08m
1 stop
ORD7:43 pmChicago O'Hare Intl
Feb 22
ORD7:15 amChicago O'Hare Intl
16h 00m
1 stop
SJO11:15 pmSan José Juan Santamaria Intl
$339

momondo Fare Finder

 
Customize your flight search to find flights from San José 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 February 5, 2026.
Use the filters below to find and compare flights from San José to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 3/4

12:35 pm-10:27 pm

1 stop9h 52m

Lambert-St Louis

Mon 3/9

4:51 pm-10:40 am

1 stop18h 49m

$278

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 3/4

12:35 pm-10:27 pm

1 stop9h 52m

Lambert-St Louis

Tue 3/10

4:51 pm-10:40 am

1 stop18h 49m

$281

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 2/19

1:31 pm-6:51 am

2 stops17h 20m

Lambert-St Louis

Tue 2/24

3:49 pm-11:40 am

1 stop19h 51m

$284

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

Thu 2/19

12:35 pm-7:46 am

1 stop19h 11m

Chicago O'Hare Intl

Sun 2/22

7:39 am-12:56 pm

Nonstop5h 17m

$300

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

Thu 2/19

11:01 am-12:04 am

1 stop13h 03m

Chicago O'Hare Intl

Sun 2/22

2:22 pm-4:46 pm

3 stops26h 24m

$302

San JoséChicago

SJO - MDW

SJOMDW

San José Juan Santamaria Intl

Thu 2/19

7:00 am-5:45 pm

1 stop10h 45m

Chicago Midway

Sun 2/22

9:34 am-10:02 pm

2 stops12h 28m

$302

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

Tue 3/24

12:19 pm-11:17 pm

1 stop9h 58m

Chicago O'Hare Intl

Tue 4/7

5:05 am-11:14 am

1 stop7h 09m

$303

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

Tue 4/21

12:31 pm-7:59 am

2 stops18h 28m

Chicago O'Hare Intl

Tue 4/28

5:15 am-11:22 am

1 stop7h 07m

$304

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Tue 2/17

1:31 pm-6:51 am

2 stops17h 20m

Lambert-St Louis

Tue 2/24

3:49 pm-11:40 am

1 stop19h 51m

$304

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

Thu 2/19

8:00 am-4:14 pm

1 stop8h 14m

Chicago O'Hare Intl

Tue 2/24

3:10 pm-8:12 pm

Nonstop5h 02m

$305

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 José 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 José is in January. Flight prices, which tend to average around $378, 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 October is also cheap. Prices for this month can be found on momondo for an average of $412.

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

The cheapest day to depart from San José to Illinois is on a Thursday when prices can be found for as low as $412. Flights from San José to Illinois on a Sunday will generally be more expensive and average around $584. 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 morning. Flights from San José to Illinois during this time can be as low as $459. Flights at noon are often more expensive with an average ticket price of $466.

What is the cheapest San José Juan Santamaria Intl to Illinois flight route?

Fly from San José Juan Santamaria Intl to Chicago O'Hare Intl for the best San José Juan Santamaria Intl - 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 José when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $449 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from San José for as low as $395 on momondo.

What cabin class options are available on San José Juan Santamaria Intl to Illinois flights?

There are 3 cabin classes available to choose from on San José Juan Santamaria Intl 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 José to Illinois flights?

No. A direct flight is the cheapest option for a flight between San José to Illinois.

Cheap San José to Illinois flight deals and tips

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

Best Price Found

$172

Fastest flight time

5h 24m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from San José in the past 72 hours is $172. The best round-trip flight deal from San José to Illinois found on momondo in the last 72 hours is $302.
The fastest flight from San José to Illinois takes 5h 24m
Direct flights go from San José to Illinois every day.
There are 98 airports in Illinois. From San José there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

  • When did momondo last update prices for flights from San José Juan Santamaria Intl Airport to Illinois?

    Prices for flights from San José Juan Santamaria Intl Airport to Illinois were last updated today.

  • How many operators does momondo search for flights from San José Juan Santamaria Intl Airport to Illinois?

  • How old do you have to be to fly from San José Juan Santamaria Intl Airport to Illinois?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San José Juan Santamaria Intl Airport to Illinois.

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

    The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from San José to Illinois?

Best airlines flying from San José to Illinois

Compare and see reviews for airlines that fly from San José to Illinois with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $206Free CancellationRating
6.3
8,419 reviews
Search Spirit Airlines flights
AviancaPriceFrom $249Free CancellationRating
6.5
2,499 reviews
Search Avianca flights
Copa AirlinesPriceFrom $311Free CancellationRating
7.5
1,557 reviews
Search Copa Airlines flights
American AirlinesPriceFrom $332Free CancellationRating
7.2
11,237 reviews
Search American Airlines flights
United AirlinesPriceFrom $400Free CancellationRating
7.4
9,240 reviews
Search United Airlines flights
SouthwestPriceFrom $463Free CancellationRating
8.0
4,275 reviews
Search Southwest flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Illinois from San José.

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

Flights from San José to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for San José to Illinois flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Illinois from San José 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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