What is the cheapest airline that flies from Illinois to San José Juan Santamaria Intl?

Frontier, United Airlines, and American Airlines are the most popular carriers operating from Illinois to San José Juan Santamaria Intl

What airlines fly to San José?

United Airlines, American Airlines and Spirit Airlines are the top three most popular airlines that fly to San José from Illinois according to our data. United Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to San José. Keep in mind that there are 8 different airlines that fly to San José on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to San José?

The flight from Illinois to San José depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Chicago (a popular airport in Illinois) to San José (the most popular airport in San José), then the flight time is 6h 05m on average. If you fly from Moline (another popular airport in Illinois) to San José, then the average flight time is 13h 10m.

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

Prices for flights from Illinois to San José Juan Santamaria Intl Airport refresh daily.

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

As of April 2026, there are 8 operators available to choose from for flights from Illinois to San José Juan Santamaria Intl Airport.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to San José Juan Santamaria Intl Airport.

What documentation or ID do you need to fly to San José Juan Santamaria Intl Airport?

The required travel and health documents for your San José Juan Santamaria Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San José Juan Santamaria Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$129 Cheap Flights from Illinois to San José in 2026

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Find the cheapest flights from Illinois to San José

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

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

Sat, Jun 6 - Thu, Jun 11

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 16 - Fri, Aug 21

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

Sun, Aug 30 - Thu, Sep 3

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

Wed, May 27 - Tue, Jun 2

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

Sat, Jun 6 - Thu, Jun 11

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

Wed, May 27 - Fri, Jun 5

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

Sat, Jul 4 - Fri, Jul 10

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

Thu, May 28 - Fri, Jun 5

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

Wed, May 27 - Sun, May 31

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Frontier flights from Illinois to San José

Our best Frontier deals on Illinois to San José flight tickets

Frontier

Aug 8

STL4:09 pmLambert-St Louis

17h 11m

1 stop

SJO8:20 amSan José Juan Santamaria Intl

Aug 15

SJO9:35 amSan José Juan Santamaria Intl

13h 24m

1 stop

STL11:59 pmLambert-St Louis

$352

Frontier

Jun 6

STL4:19 pmLambert-St Louis

17h 00m

1 stop

SJO8:19 amSan José Juan Santamaria Intl

Jun 11

SJO9:35 amSan José Juan Santamaria Intl

13h 34m

1 stop

STL12:09 amLambert-St Louis

$358

Frontier

Jun 6

STL4:19 pmLambert-St Louis

17h 00m

1 stop

SJO8:19 amSan José Juan Santamaria Intl

Jun 11

SJO9:35 amSan José Juan Santamaria Intl

13h 34m

1 stop

STL12:09 amLambert-St Louis

$368

Southwest flights from Illinois to San José

Our best Southwest deals on Illinois to San José flight tickets

Southwest

May 26

ORD5:55 amChicago O'Hare Intl

7h 15m

1 stop

SJO12:10 pmSan José Juan Santamaria Intl

May 28

SJO9:00 amSan José Juan Santamaria Intl

11h 55m

1 stop

ORD9:55 pmChicago O'Hare Intl

$440

Southwest

Sep 9

MDW6:15 amChicago Midway

7h 30m

1 stop

SJO12:45 pmSan José Juan Santamaria Intl

Sep 16

SJO1:40 pmSan José Juan Santamaria Intl

8h 30m

1 stop

MDW11:10 pmChicago Midway

$476

Southwest

Sep 8

MDW9:05 amChicago Midway

10h 35m

2 stops

SJO6:40 pmSan José Juan Santamaria Intl

Sep 15

SJO1:40 pmSan José Juan Santamaria Intl

8h 30m

1 stop

MDW11:10 pmChicago Midway

$480

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 6/6

4:19 pm-8:19 am

1 stop17h 00m

San José Juan Santamaria Intl

Thu 6/11

9:35 am-12:09 am

1 stop13h 34m

$358

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 6/6

4:19 pm-8:19 am

1 stop17h 00m

San José Juan Santamaria Intl

Thu 6/11

9:35 am-12:09 am

1 stop13h 34m

$368

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sun 8/16

5:23 am-12:26 pm

1 stop8h 03m

San José Juan Santamaria Intl

Fri 8/21

1:29 pm-8:31 am

1 stop18h 02m

$390

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sun 8/30

6:03 am-7:52 pm

2 stops14h 49m

San José Juan Santamaria Intl

Thu 9/3

6:00 am-11:23 pm

2 stops16h 23m

$395

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Wed 5/27

11:25 am-10:39 pm

2 stops12h 14m

San José Juan Santamaria Intl

Tue 6/2

12:30 am-10:07 am

1 stop8h 37m

$396

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 6/6

5:27 pm-11:45 am

2 stops19h 18m

San José Juan Santamaria Intl

Thu 6/11

9:35 am-12:09 am

1 stop13h 34m

$400

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Wed 5/27

8:05 am-11:45 am

1 stop28h 40m

San José Juan Santamaria Intl

Fri 6/5

1:00 pm-11:15 pm

1 stop9h 15m

$416

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Sat 7/4

5:10 am-12:15 pm

1 stop8h 05m

San José Juan Santamaria Intl

Fri 7/10

1:21 pm-9:22 am

1 stop19h 01m

$419

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Thu 5/28

5:05 am-11:45 am

1 stop7h 40m

San José Juan Santamaria Intl

Fri 6/5

1:00 pm-11:15 pm

1 stop9h 15m

$421

Quickest round-trip

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Wed 5/27

4:05 pm-10:39 pm

1 stop7h 34m

San José Juan Santamaria Intl

Sun 5/31

12:30 am-10:20 am

1 stop8h 50m

$425

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Illinois to San José

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

Prices

Airlines

Other information

What is the cheapest month to fly to San José?

In general, August is the cheapest month to fly from Illinois to San José. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $88. If you don’t want to visit San José in August, then you should wait until October to fly from Illinois, when ticket prices are also cheap, with an average price of $107.

What is the cheapest day to depart on your flight to San José?

On average, the least expensive day to fly to San José from Illinois is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $513. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Illinois to San José on a Saturday will generally be more expensive and average around $689. 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 San José?

Our data shows that the cheapest Illinois to San José flights are usually those with departure times in the afternoon. Our users have found flights to San José in the afternoon for as low as $514. Flights at noon are often more expensive with an average ticket price of $664.

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

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

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

You are more likely to see cheaper flights to San José from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to San José for around $515 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San José from Illinois for as low as $438 on momondo.

Can stopping save me money on Illinois to San José flights?

You could potentially save up to 2% on your flight if you consider stops on a Illinois to San José flight.

Cheap Illinois to San José flight deals and tips

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

Best Price Found	$388
Fastest flight time	5h 19m
Direct flights	Sun
Airports in San José	1 airport

The best one-way flight to San José from Illinois in the past 72 hours is $388. The best round-trip flight deal from Illinois to San José found on momondo in the last 72 hours is $607.

The fastest flight from Illinois to San José takes 5h 19m

Direct flights go from Illinois to San José on Sunday. There are no airlines offering direct flights.

There is 1 airport in San José. From Illinois there are direct flights to San José Juan Santamaria Intl (SJO).

Search flight deals

Frequently asked questions about flying from Illinois to San José

When did momondo last update prices for flights from Illinois to San José Juan Santamaria Intl Airport?
Prices for flights from Illinois to San José Juan Santamaria Intl Airport refresh daily.
How many operators does momondo search for flights from Illinois to San José Juan Santamaria Intl Airport?
As of April 2026, there are 8 operators available to choose from for flights from Illinois to San José Juan Santamaria Intl Airport.
How old do you have to be to fly from Illinois to San José Juan Santamaria Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to San José Juan Santamaria Intl Airport.
What documentation or ID do you need to fly to San José Juan Santamaria Intl Airport?
The required travel and health documents for your San José Juan Santamaria Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San José Juan Santamaria Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Illinois to San José?
Based on momondo bookings for flights between Illinois and San José, the leading plane model is Boeing 737 MAX 8, making up 71.29% of the total bookings. Other popular models include Canadair (Bombardier) Regional Jet with 23.10%, Boeing 737 MAX 9 with 1.32%, and Boeing 737-800 with 1.32%.

Best airlines flying from Illinois to San José

Compare and see reviews for airlines that fly from Illinois to San José with momondo

Airline	Rating	Free Cancellation	Price
Avianca	PriceFrom $139	Free Cancellation	Rating 6.5 2,518 reviews	Search Avianca flights
Delta	PriceFrom $205	Free Cancellation	Rating 7.9 8,464 reviews	Search Delta flights
Spirit Airlines	PriceFrom $225	Free Cancellation	Rating 6.3 8,638 reviews	Search Spirit Airlines flights
Copa Airlines	PriceFrom $303	Free Cancellation	Rating 7.5 1,577 reviews	Search Copa Airlines flights
American Airlines	PriceFrom $342	Free Cancellation	Rating 7.1 11,682 reviews	Search American Airlines flights
Frontier	PriceFrom $345	Free Cancellation	Rating 5.6 2,970 reviews	Search Frontier flights
United Airlines	PriceFrom $386	Free Cancellation	Rating 7.4 9,677 reviews	Search United Airlines flights
Southwest	PriceFrom $394	Free Cancellation	Rating 8.0 4,317 reviews	Search Southwest flights

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Why use momondo?

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

Finding the right flight to San José from Illinois is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San José quick and easy, saving you time and money.

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

Flights from Illinois to San José 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 Illinois to San José?

momondo provides multiple filters to help you find the best flight to San José from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Illinois to San José flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Cheap flights from Illinois to San José from $148

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to San José departing on 5/23. 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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Frontier flights from Illinois to San José

Our best Frontier deals on Illinois to San José flight tickets

Southwest flights from Illinois to San José

Our best Southwest deals on Illinois to San José flight tickets

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See travel insights to San José from

How to get the cheapest flight ticket from Illinois to San José

What is the cheapest month to fly to San José?

What is the cheapest day to depart on your flight to San José?

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

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

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

Can stopping save me money on Illinois to San José flights?

What is the cheapest airline that flies from Illinois to San José Juan Santamaria Intl?

What airlines fly to San José?

How long does it take to fly to San José?

Cheap Illinois to San José flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in San José

Frequently asked questions about flying from Illinois to San José

Best airlines flying from Illinois to San José

Compare and see reviews for airlines that fly from Illinois to San José with momondo

Traveling to a place near San José?

Why use momondo?

An easier way to manage your San José trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Costa Rica

Airports servicing Costa Rica

Fly your favorite airline to San José

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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List of cabin classes available on flights landing in San José. Availability may vary depending on flight origin and airline.

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