What is the cheapest airline that flies from Seattle/Tacoma Intl to Costa Rica?

Sun Country Air, United Airlines, and Alaska Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Costa Rica

What airlines fly to Costa Rica?

United Airlines, American Airlines and Alaska Airlines are the top three most popular airlines that fly to Costa Rica from Seattle according to our data. United Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Costa Rica. Keep in mind that there are 7 different airlines that fly to Costa Rica on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Costa Rica?

Prices for flights from Seattle/Tacoma Intl Airport to Costa Rica refresh daily.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Costa Rica?

There are 7 operators available for flights from Seattle/Tacoma Intl Airport to Costa Rica as of November 2026.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Costa Rica?

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 Seattle/Tacoma Intl Airport to Costa Rica.

What documentation or ID do you need to fly to Costa Rica?

The necessary travel and health documents for your Costa Rica 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.

$269 Cheap Flights from Seattle to Costa Rica in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Costa Rica

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:20 am - 2:15 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

28h 55m1 stop Miami

7:45 am - 9:56 pmSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

15h 11m1 stop Miami

$558Multiple Airlines

Tue, Mar 16 - Tue, Mar 30

8:13 am - 2:15 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

28h 02m1 stop Miami

7:00 am - 10:00 pmSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

17h 00m1 stop Miami

$571Multiple Airlines

Thu, Jan 28 - Thu, Feb 4

11:30 am - 12:50 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

23h 20m2 stops Phoenix Sky Harbor Intl Denver Intl

1:05 pm - 11:00 pmSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

11h 55m2 stops Houston Hobby Denver Intl

$607Southwest

Fri, Feb 26 - Mon, Mar 1

4:20 pm - 1:45 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

19h 25m2 stops Las Vegas Harry Reid Intl Houston Hobby

1:05 pm - 12:55 amSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

13h 50m2 stops Houston Hobby Phoenix Sky Harbor Intl

$607Southwest

Mon, Feb 22 - Mon, Mar 8

11:10 am - 11:57 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

10h 47m1 stop Los Angeles

1:45 am - 1:49 pmSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

14h 04m1 stop Los Angeles

$612Alaska Airlines

Thu, Feb 18 - Wed, Mar 10

8:05 am - 11:57 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

13h 52m1 stop Los Angeles

1:45 am - 1:56 pmSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

14h 11m2 stops Los Angeles Portland

$617Alaska Airlines

Thu, Feb 18 - Wed, Mar 10

5:43 pm - 1:49 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

18h 06m1 stop Dallas/Fort Worth

12:25 am - 1:38 pmSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

15h 13m1 stop Dallas/Fort Worth

$631American Airlines

Tue, Feb 16 - Wed, Feb 24

3:51 pm - 1:49 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

19h 58m1 stop Dallas/Fort Worth

12:25 am - 1:38 pmSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

15h 13m1 stop Dallas/Fort Worth

$631American Airlines

Sun, Feb 21 - Fri, Feb 26

6:00 am - 9:49 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

13h 49m1 stop Atlanta Hartsfield-Jackson

3:55 pm - 10:05 amSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

20h 10m1 stop Atlanta Hartsfield-Jackson

$631Delta

Sat, Jan 23 - Sat, Jan 30

6:00 am - 9:49 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

13h 49m1 stop Atlanta Hartsfield-Jackson

7:00 am - 11:25 pmSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

18h 25m1 stop Atlanta Hartsfield-Jackson

$631Delta

Thu, Jan 21 - Tue, Jan 26

Cheap last minute flights

Enter your travel dates to find the best prices.

7:45 am - 2:10 pmSEA Seattle/Tacoma Intl-LIR Liberia

28h 25m1 stop Toronto Pearson Intl

3:20 pm - 6:22 pmLIR Liberia-SEA Seattle/Tacoma Intl

29h 02m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

$689Air Canada

Tue, Nov 17 - Tue, Nov 24

10:10 am - 2:10 pmSEA Seattle/Tacoma Intl-LIR Liberia

26h 00m2 stops Vancouver Intl Toronto Pearson Intl

3:20 pm - 6:22 pmLIR Liberia-SEA Seattle/Tacoma Intl

29h 02m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

$689Air Canada

Tue, Nov 17 - Tue, Nov 24

12:25 am - 2:35 pmSEA Seattle/Tacoma Intl-LIR Liberia

12h 10m1 stop Dallas/Fort Worth

3:23 pm - 9:37 amLIR Liberia-SEA Seattle/Tacoma Intl

20h 14m1 stop Dallas/Fort Worth

$939American Airlines

Sun, Nov 15 - Mon, Nov 23

5:05 am - 4:10 pmSEA Seattle/Tacoma Intl-LIR Liberia

9h 05m1 stop Denver Intl

1:00 pm - 11:15 pmLIR Liberia-SEA Seattle/Tacoma Intl

12h 15m1 stop Denver Intl

$949United Airlines

Wed, Nov 18 - Wed, Nov 25

5:05 am - 4:10 pmSEA Seattle/Tacoma Intl-LIR Liberia

9h 05m1 stop Denver Intl

1:00 pm - 11:15 pmLIR Liberia-SEA Seattle/Tacoma Intl

12h 15m1 stop Denver Intl

$949United Airlines

Wed, Nov 18 - Wed, Nov 25

12:25 am - 2:35 pmSEA Seattle/Tacoma Intl-LIR Liberia

12h 10m1 stop Dallas/Fort Worth

3:23 pm - 9:37 amLIR Liberia-SEA Seattle/Tacoma Intl

20h 14m1 stop Dallas/Fort Worth

$949American Airlines

Sun, Nov 15 - Mon, Nov 23

10:40 pm - 2:10 pmSEA Seattle/Tacoma Intl-LIR Liberia

13h 30m1 stop Atlanta Hartsfield-Jackson

3:25 pm - 10:05 amLIR Liberia-SEA Seattle/Tacoma Intl

20h 40m1 stop Atlanta Hartsfield-Jackson

$1,029Delta

Fri, Nov 13 - Sat, Nov 21

10:40 pm - 2:10 pmSEA Seattle/Tacoma Intl-LIR Liberia

13h 30m1 stop Atlanta Hartsfield-Jackson

2:00 pm - 11:57 pmLIR Liberia-SEA Seattle/Tacoma Intl

11h 57m1 stop Atlanta Hartsfield-Jackson

$1,029Delta

Fri, Nov 13 - Fri, Nov 20

6:00 am - 6:35 pmSEA Seattle/Tacoma Intl-LIR Liberia

10h 35m1 stop Los Angeles

8:31 am - 2:21 pmLIR Liberia-SEA Seattle/Tacoma Intl

7h 50mnonstop

$1,189Alaska Airlines

Sun, Nov 15 - Sun, Nov 22

6:00 am - 6:35 pmSEA Seattle/Tacoma Intl-LIR Liberia

10h 35m1 stop Los Angeles

8:31 am - 2:21 pmLIR Liberia-SEA Seattle/Tacoma Intl

7h 50mnonstop

$1,262Alaska Airlines

Wed, Nov 18 - Sun, Nov 22

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Alaska Airlines flights from Seattle to Costa Rica

Our best Alaska Airlines deals on Seattle to Costa Rica flight tickets

Alaska Airlines

Feb 18

SEA11:10 amSeattle/Tacoma Intl

10h 47m

1 stop

SJO11:57 pmSan José Juan Santamaria Intl

Mar 10

SJO1:45 amSan José Juan Santamaria Intl

14h 04m

1 stop

SEA1:49 pmSeattle/Tacoma Intl

$612

Alaska Airlines

Feb 18

SEA8:05 amSeattle/Tacoma Intl

13h 52m

1 stop

SJO11:57 pmSan José Juan Santamaria Intl

Mar 10

SJO1:45 amSan José Juan Santamaria Intl

14h 11m

2 stops

SEA1:56 pmSeattle/Tacoma Intl

$617

Alaska Airlines

Feb 17

SEA8:20 pmSeattle/Tacoma Intl

25h 37m

2 stops

SJO11:57 pmSan José Juan Santamaria Intl

Mar 10

SJO1:45 amSan José Juan Santamaria Intl

20h 20m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$618

United Airlines flights from Seattle to Costa Rica

Our best United Airlines deals on Seattle to Costa Rica flight tickets

United Airlines

Dec 1

SEA7:30 pmSeattle/Tacoma Intl

11h 02m

1 stop

SJO8:32 amSan José Juan Santamaria Intl

Dec 8

SJO8:45 amSan José Juan Santamaria Intl

15h 13m

2 stops

SEA9:58 pmSeattle/Tacoma Intl

$666

United Airlines

Dec 1

SEA7:30 pmSeattle/Tacoma Intl

11h 02m

1 stop

SJO8:32 amSan José Juan Santamaria Intl

Dec 5

SJO9:40 amSan José Juan Santamaria Intl

13h 07m

1 stop

SEA8:47 pmSeattle/Tacoma Intl

$668

United Airlines

Dec 9

SEA5:05 amSeattle/Tacoma Intl

9h 05m

1 stop

LIR4:10 pmLiberia

Dec 16

LIR2:20 pmLiberia

10h 31m

1 stop

SEA10:51 pmSeattle/Tacoma Intl

$712

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Tue 3/16

8:20 am-2:15 pm

1 stop28h 55m

San José Juan Santamaria Intl

Tue 3/30

7:45 am-9:56 pm

1 stop15h 11m

$558

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Thu 1/28

8:13 am-2:15 pm

1 stop28h 02m

San José Juan Santamaria Intl

Thu 2/4

7:00 am-10:00 pm

1 stop17h 00m

$571

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Fri 2/26

11:30 am-12:50 pm

2 stops23h 20m

San José Juan Santamaria Intl

Mon 3/1

1:05 pm-11:00 pm

2 stops11h 55m

$607

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Mon 2/22

4:20 pm-1:45 pm

2 stops19h 25m

San José Juan Santamaria Intl

Mon 3/8

1:05 pm-12:55 am

2 stops13h 50m

$607

Quickest round-trip

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Thu 2/18

11:10 am-11:57 pm

1 stop10h 47m

San José Juan Santamaria Intl

Wed 3/10

1:45 am-1:49 pm

1 stop14h 04m

$612

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Thu 2/18

8:05 am-11:57 pm

1 stop13h 52m

San José Juan Santamaria Intl

Wed 3/10

1:45 am-1:56 pm

2 stops14h 11m

$617

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Tue 2/16

5:43 pm-1:49 pm

1 stop18h 06m

San José Juan Santamaria Intl

Wed 2/24

12:25 am-1:38 pm

1 stop15h 13m

$631

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Sun 2/21

3:51 pm-1:49 pm

1 stop19h 58m

San José Juan Santamaria Intl

Fri 2/26

12:25 am-1:38 pm

1 stop15h 13m

$631

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Sat 1/23

6:00 am-9:49 pm

1 stop13h 49m

San José Juan Santamaria Intl

Sat 1/30

3:55 pm-10:05 am

1 stop20h 10m

$631

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Thu 1/21

6:00 am-9:49 pm

1 stop13h 49m

San José Juan Santamaria Intl

Tue 1/26

7:00 am-11:25 pm

1 stop18h 25m

$631

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 Seattle to Costa Rica

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

What is the cheapest month to fly to Costa Rica?

The cheapest month to fly to Costa Rica from Seattle is in January. Flight prices, which tend to average around $606, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in January, then May is your next best option. Flight prices from Seattle to Costa Rica during May average around $650.

What is the cheapest Seattle/Tacoma Intl to Costa Rica flight route?

Fly from Seattle/Tacoma Intl to Liberia for the best Seattle/Tacoma Intl - Costa Rica flight prices

How far in advance should I book a flight from Seattle to Costa Rica?

You are more likely to see cheaper flights to Costa Rica from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Costa Rica for around $707 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Costa Rica from Seattle for as low as $661 on momondo.

What cabin class options are available on Seattle to Costa Rica flights?

There is only 1 cabin class available to choose from on Seattle to Costa Rica 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 Seattle to Costa Rica flights?

You could potentially save up to 17% on your flight if you consider stops on a Seattle to Costa Rica flight.

Cheap Seattle to Costa Rica flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Costa Rica

Best Price Found	$269
Fastest flight time	6h 58m
Direct flights	Sun
Airports in Costa Rica	40 airports

The best one-way flight to Costa Rica from Seattle in the past 72 hours is $269. The best round-trip flight deal from Seattle to Costa Rica found on momondo in the last 72 hours is $558.

The fastest flight from Seattle to Costa Rica takes 6h 58m

Direct flights go from Seattle to Costa Rica on Sunday. There are no airlines offering direct flights.

There are 40 airports in Costa Rica. From Seattle there are direct flights to Liberia (LIR).

Search flight deals

Frequently asked questions about flying from Seattle to Costa Rica

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Costa Rica?
Prices for flights from Seattle/Tacoma Intl Airport to Costa Rica refresh daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Costa Rica?
There are 7 operators available for flights from Seattle/Tacoma Intl Airport to Costa Rica as of November 2026.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Costa Rica?
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 Seattle/Tacoma Intl Airport to Costa Rica.
What documentation or ID do you need to fly to Costa Rica?
The necessary travel and health documents for your Costa Rica 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 Seattle to Costa Rica?
momondo data reveals that the most frequently booked plane model on the route from Seattle to Costa Rica is Boeing 737 MAX 8, representing 100.00% of all bookings.

Best airlines flying from Seattle to Costa Rica

Compare and see reviews for airlines that fly from Seattle to Costa Rica with momondo

Airline	Rating	Free Cancellation	Price
JetBlue	PriceFrom $362	Free Cancellation	Rating 7.1 3,072 reviews	Search JetBlue flights
American Airlines	PriceFrom $366	Free Cancellation	Rating 7.0 12,225 reviews	Search American Airlines flights
Air Canada	PriceFrom $384	Free Cancellation	Rating 7.1 11,890 reviews	Search Air Canada flights
Delta	PriceFrom $390	Free Cancellation	Rating 7.8 8,708 reviews	Search Delta flights
Alaska Airlines	PriceFrom $392	Free Cancellation	Rating 7.9 13,158 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $414	Free Cancellation	Rating 7.3 10,479 reviews	Search United Airlines flights
Southwest	PriceFrom $506	Free Cancellation	Rating 8.0 4,217 reviews	Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Costa Rica?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Costa Rica for you.

Can I find flights from Seattle to Costa Rica with flexible booking policies on momondo?

All flight searches from Seattle to Costa Rica on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seattle to Costa Rica?

Once all potential Seattle to Costa Rica flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Costa Rica right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Costa Rica now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Costa Rica and let you know when they change.

An easier way to manage your Costa Rica 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.

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Complete your trip

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Popular cities in Costa Rica

Flights to San Joséfrom $168

Flights to Liberiafrom $297

Flights to Limon

Flights to Tamarindo

Flights to Tortuguero

Flights to Golfito

Flights to Tambor

Cheap flights from Seattle to Costa Rica from $269

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Costa Rica departing on 4/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Seattle to Costa Rica

Cheap round-trip flights

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Cheap last minute flights

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Big names and deals

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Alaska Airlines flights from Seattle to Costa Rica

Our best Alaska Airlines deals on Seattle to Costa Rica flight tickets

United Airlines flights from Seattle to Costa Rica

Our best United Airlines deals on Seattle to Costa Rica flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Seattle to Costa Rica that are best for you.

See travel insights to Costa Rica from

How to get the cheapest flight ticket from Seattle to Costa Rica

What is the cheapest month to fly to Costa Rica?

What is the cheapest Seattle/Tacoma Intl to Costa Rica flight route?

How far in advance should I book a flight from Seattle to Costa Rica?

What cabin class options are available on Seattle to Costa Rica flights?

Can stopping save me money on Seattle to Costa Rica flights?

What is the cheapest airline that flies from Seattle/Tacoma Intl to Costa Rica?

What airlines fly to Costa Rica?

Cheap Seattle to Costa Rica flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Airports in Costa Rica

Frequently asked questions about flying from Seattle to Costa Rica

Best airlines flying from Seattle to Costa Rica

Compare and see reviews for airlines that fly from Seattle to Costa Rica with momondo

Why use momondo?

An easier way to manage your Costa Rica 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

Popular cities in Costa Rica

Popular flights according to clicks in the last 7 days on momondo

Seattle flight routes

According to popular flight searches on momondo this year

Costa Rica flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Costa Rica

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

Cabin classes currently available on flights to Costa Rica

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

Complete your trip to Costa Rica

Explore popular destinations other users love

According to popular flight searches on momondo this year