How does KAYAK find such low prices on flights from Illinois to San José?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to San José. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San José?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San José from Illinois is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Illinois to San José?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San José with an airline and back to Illinois with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to San José?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San José from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$148 CHEAP FLIGHTS from Illinois to San José

SJO

KAYAK searches hundreds of travel sites at once for deals on flights to San José

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Cheap Flights from Illinois to San José

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to San José

Sat, Jun 6 - Thu, Jun 11

4:19 pm - 8:19 am

STL

SJO

17h 00m

1 stop

9:35 am - 12:09 am

SJO

STL

13h 34m

1 stop

$358Frontier

Sat, Jun 6 - Thu, Jun 11

4:19 pm - 8:19 am

STL

SJO

17h 00m

1 stop

9:35 am - 12:09 am

SJO

STL

13h 34m

1 stop

$368Frontier

Sun, Aug 16 - Fri, Aug 21

5:23 am - 12:26 pm

STL

SJO

8h 03m

1 stop

1:29 pm - 8:31 am

SJO

STL

18h 02m

1 stop

$390American Airlines

Sun, Aug 30 - Thu, Sep 3

6:03 am - 7:52 pm

STL

SJO

14h 49m

2 stops

6:00 am - 11:23 pm

SJO

STL

16h 23m

2 stops

$395American Airlines

Wed, May 27 - Tue, Jun 2

11:25 am - 10:39 pm

STL

SJO

12h 14m

2 stops

12:30 am - 10:07 am

SJO

STL

8h 37m

1 stop

$396United Airlines

Sat, Jun 6 - Thu, Jun 11

5:27 pm - 11:45 am

STL

SJO

19h 18m

2 stops

9:35 am - 12:09 am

SJO

STL

13h 34m

1 stop

$400Multiple Airlines

Wed, May 27 - Fri, Jun 5

8:05 am - 11:45 am

ORD

SJO

28h 40m

1 stop

1:00 pm - 11:15 pm

SJO

ORD

9h 15m

1 stop

$416Multiple Airlines

Sat, Jul 4 - Fri, Jul 10

5:10 am - 12:15 pm

ORD

SJO

8h 05m

1 stop

1:21 pm - 9:22 am

SJO

ORD

19h 01m

1 stop

$419Spirit Airlines

Thu, May 28 - Fri, Jun 5

5:05 am - 11:45 am

ORD

SJO

7h 40m

1 stop

1:00 pm - 11:15 pm

SJO

ORD

9h 15m

1 stop

$421Spirit Airlines

Wed, May 27 - Sun, May 31

4:05 pm - 10:39 pm

ORD

SJO

7h 34m

1 stop

12:30 am - 10:20 am

SJO

ORD

8h 50m

1 stop

$425United Airlines

Useful Info

Low season	September
High season	December
Cheapest flight	$148

Best time to beat the crowds with an average 18% drop in price.

Most popular time to fly with an average 28% increase in price.

Flight from Chicago O'Hare Airport to San José

How does KAYAK find such low prices on flights from Illinois to San José?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to San José.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San José?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San José from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to San José?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San José with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to San José?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San José from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Heredia

Santa Elena

Esterillos Este

San Gerardo de Dota

San Lorenzo

Everything you need to know for your flight to San José

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in San José

San José (SJO)

SJO

$128 Find Cheap Flights from Illinois to San José

KAYAK searches hundreds of travel sites at once for deals on flights to San José

Cheap Flights from Illinois to San José

Recent round-trip flight deals from Illinois to San José

Recent one-way flight deals from Illinois to San José

Recent last minute flight deals from Illinois to San José

Recent direct flight deals from Illinois to San José

Good to know

FAQs for booking flights from Illinois to San José

How does KAYAK find such low prices on flights from Illinois to San José?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to San José.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San José?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San José from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Illinois to San José?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San José with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to San José?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San José from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near San José?

Everything you need to know for your flight to San José

Information on the airport you'll fly into in San José

Cabin class types available on flights to Illinois

Complete your trip to San José with a hotel stay or car rental

Find direct flights for San José

Flights to other popular destinations

Flights from domestic origins to San José

Choose which airport to fly into in San José

Find deals for your return flight