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

American Airlines, Southwest, and Air Canada 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 40% 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 September 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.

$204 Cheap Flights from Seattle to Costa Rica in 2026

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.

8:50 pm - 12:33 pmSEA Seattle/Tacoma Intl-LIR Liberia

14h 43m1 stop Miami

3:17 pm - 9:37 amLIR Liberia-SEA Seattle/Tacoma Intl

20h 20m1 stop Dallas/Fort Worth

$440American Airlines

Sat, Oct 31 - Thu, Nov 12

5:39 pm - 2:17 pmSEA Seattle/Tacoma Intl-LIR Liberia

19h 38m2 stops Chicago O'Hare Intl Miami

3:35 pm - 9:37 amLIR Liberia-SEA Seattle/Tacoma Intl

20h 02m2 stops Miami Dallas/Fort Worth

$445American Airlines

Sat, Oct 31 - Thu, Nov 12

6:30 am - 7:40 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

12h 10m2 stops Denver Intl Houston Hobby

1:30 pm - 10:00 amSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

21h 30m2 stops Houston Hobby Denver Intl

$524Southwest

Sun, Oct 25 - Fri, Oct 30

3:15 pm - 2:20 pmSEA Seattle/Tacoma Intl-LIR Liberia

21h 05m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

3:10 pm - 8:59 pmLIR Liberia-SEA Seattle/Tacoma Intl

31h 49m1 stop Toronto Pearson Intl

$543Air Canada

Tue, Dec 1 - Sun, Dec 6

7:55 am - 1:10 pmSEA Seattle/Tacoma Intl-LIR Liberia

28h 15m1 stop Toronto Pearson Intl

2:20 pm - 7:22 pmLIR Liberia-SEA Seattle/Tacoma Intl

30h 02m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

$543Air Canada

Sat, Oct 24 - Sat, Oct 31

11:15 pm - 8:30 amSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

32h 15m1 stop New York John F Kennedy Intl

7:45 am - 9:59 pmSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

15h 14m1 stop Miami

$549Multiple Airlines

Sat, Sep 26 - Sat, Oct 3

2:02 pm - 8:30 amSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

17h 28m2 stops New York John F Kennedy Intl Guatemala City La Aurora

4:35 pm - 10:35 amSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

19h 00m2 stops Guatemala City La Aurora New York John F Kennedy Intl

$562Multiple Airlines

Fri, Oct 9 - Sun, Oct 18

6:15 am - 7:40 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

12h 25m2 stops Las Vegas Harry Reid Intl Houston Hobby

9:00 am - 12:40 amSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

16h 40m2 stops Orlando Chicago Midway

$565Southwest

Thu, Oct 22 - Thu, Oct 29

3:55 pm - 12:00 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

19h 05m1 stop Atlanta Hartsfield-Jackson

1:25 pm - 10:03 amSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

21h 38m1 stop Atlanta Hartsfield-Jackson

$589Delta

Mon, Oct 19 - Mon, Oct 26

10:35 pm - 12:00 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

12h 25m1 stop Atlanta Hartsfield-Jackson

1:25 pm - 10:03 amSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

21h 38m1 stop Atlanta Hartsfield-Jackson

$589Delta

Fri, Oct 23 - Fri, Oct 30

Cheap last minute flights

Enter your travel dates to find the best prices.

9:27 am - 8:30 amSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

22h 03m2 stops New York John F Kennedy Intl Guatemala City La Aurora

7:45 am - 9:54 pmSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

15h 09m1 stop Miami

$609Multiple Airlines

Fri, Sep 18 - Thu, Sep 24

7:35 pm - 7:15 amSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

10h 40m1 stop San Francisco

8:45 am - 6:44 pmSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

10h 59m1 stop San Francisco

$618United Airlines

Fri, Sep 18 - Thu, Sep 24

1:30 pm - 8:30 amSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

18h 00m2 stops New York John F Kennedy Intl Guatemala City La Aurora

4:35 pm - 10:34 amSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

18h 59m2 stops Guatemala City La Aurora New York John F Kennedy Intl

$618Multiple Airlines

Wed, Sep 16 - Wed, Sep 23

6:32 am - 7:37 pmSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

12h 05m2 stops Los Angeles Houston George Bush Intcntl

8:45 am - 9:01 pmSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

13h 16m1 stop San Francisco

$637United Airlines

Fri, Sep 18 - Mon, Sep 28

1:30 pm - 8:30 amSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

18h 00m2 stops New York John F Kennedy Intl Guatemala City La Aurora

7:45 am - 9:54 pmSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

15h 09m1 stop Miami

$656Multiple Airlines

Wed, Sep 16 - Wed, Sep 23

9:27 am - 8:30 amSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

22h 03m1 stop New York John F Kennedy Intl

4:35 pm - 10:34 amSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

18h 59m1 stop New York John F Kennedy Intl

$691Multiple Airlines

Sun, Sep 13 - Fri, Sep 18

10:55 am - 7:15 amSEA Seattle/Tacoma Intl-SJO San José Juan Santamaria Intl

19h 20m1 stop San Francisco

8:45 am - 1:15 amSJO San José Juan Santamaria Intl-SEA Seattle/Tacoma Intl

17h 30m1 stop San Francisco

$718United Airlines

Fri, Sep 18 - Mon, Sep 28

5:34 pm - 1:47 pmSEA Seattle/Tacoma Intl-LIR Liberia

19h 13m1 stop Dallas/Fort Worth

2:18 pm - 9:23 amLIR Liberia-SEA Seattle/Tacoma Intl

20h 05m1 stop Dallas/Fort Worth

$1,008American Airlines

Fri, Sep 18 - Mon, Sep 21

5:34 pm - 1:47 pmSEA Seattle/Tacoma Intl-LIR Liberia

19h 13m1 stop Dallas/Fort Worth

2:47 pm - 10:09 amLIR Liberia-SEA Seattle/Tacoma Intl

20h 22m2 stops Miami Chicago O'Hare Intl

$1,013American Airlines

Fri, Sep 18 - Mon, Sep 21

11:59 pm - 12:00 pmSEA Seattle/Tacoma Intl-LIR Liberia

11h 01m1 stop Atlanta Hartsfield-Jackson

1:25 pm - 11:58 pmLIR Liberia-SEA Seattle/Tacoma Intl

11h 33m1 stop Atlanta Hartsfield-Jackson

$1,073Delta

Wed, Sep 16 - Wed, Sep 23

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

United Airlines flights from Seattle to Costa Rica

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

United Airlines

Oct 21

SEA7:25 pmSeattle/Tacoma Intl

10h 50m

1 stop

SJO7:15 amSan José Juan Santamaria Intl

Oct 27

SJO7:45 amSan José Juan Santamaria Intl

14h 34m

2 stops

SEA9:19 pmSeattle/Tacoma Intl

$603

United Airlines

Sep 23

SEA5:20 pmSeattle/Tacoma Intl

12h 55m

1 stop

SJO7:15 amSan José Juan Santamaria Intl

Sep 28

SJO8:45 amSan José Juan Santamaria Intl

10h 59m

1 stop

SEA6:44 pmSeattle/Tacoma Intl

$618

United Airlines

Oct 7

SEA7:25 pmSeattle/Tacoma Intl

10h 50m

1 stop

SJO7:15 amSan José Juan Santamaria Intl

Oct 14

SJO7:55 amSan José Juan Santamaria Intl

16h 05m

1 stop

SEA11:00 pmSeattle/Tacoma Intl

$631

GOL flights from Seattle to Costa Rica

Our best GOL deals on Seattle to Costa Rica flight tickets

GOL

Sep 23

SEA11:57 pmSeattle/Tacoma Intl

19h 10m

2 stops

SJO8:07 pmSan José Juan Santamaria Intl

Sep 28

SJO2:57 pmSan José Juan Santamaria Intl

21h 43m

2 stops

SEA11:40 amSeattle/Tacoma Intl

$625

GOL

Oct 11

SEA5:41 pmSeattle/Tacoma Intl

19h 19m

1 stop

SJO2:00 pmSan José Juan Santamaria Intl

Oct 18

SJO3:01 pmSan José Juan Santamaria Intl

19h 30m

2 stops

SEA9:31 amSeattle/Tacoma Intl

$635

GOL

Sep 23

SEA11:57 pmSeattle/Tacoma Intl

19h 10m

2 stops

SJO8:07 pmSan José Juan Santamaria Intl

Sep 28

SJO1:00 pmSan José Juan Santamaria Intl

22h 09m

2 stops

SEA10:09 amSeattle/Tacoma Intl

$645

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLiberia

SEA Seattle/Tacoma Intl - LIR Liberia

SEALIR

Seattle/Tacoma Intl

Sat 10/31

8:50 pm-12:33 pm

1 stop14h 43m

Liberia

Thu 11/12

3:17 pm-9:37 am

1 stop20h 20m

$440

SeattleLiberia

SEA Seattle/Tacoma Intl - LIR Liberia

SEALIR

Seattle/Tacoma Intl

Sat 10/31

5:39 pm-2:17 pm

2 stops19h 38m

Liberia

Thu 11/12

3:35 pm-9:37 am

2 stops20h 02m

$445

SeattleSan José

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

SEASJO

Seattle/Tacoma Intl

Sun 10/25

6:30 am-7:40 pm

2 stops12h 10m

San José Juan Santamaria Intl

Fri 10/30

1:30 pm-10:00 am

2 stops21h 30m

$524

SeattleLiberia

SEA Seattle/Tacoma Intl - LIR Liberia

SEALIR

Seattle/Tacoma Intl

Tue 12/1

3:15 pm-2:20 pm

2 stops21h 05m

Liberia

Sun 12/6

3:10 pm-8:59 pm

1 stop31h 49m

$543

SeattleLiberia

SEA Seattle/Tacoma Intl - LIR Liberia

SEALIR

Seattle/Tacoma Intl

Sat 10/24

7:55 am-1:10 pm

1 stop28h 15m

Liberia

Sat 10/31

2:20 pm-7:22 pm

2 stops30h 02m

$543

SeattleSan José

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

SEASJO

Seattle/Tacoma Intl

Sat 9/26

11:15 pm-8:30 am

1 stop32h 15m

San José Juan Santamaria Intl

Sat 10/3

7:45 am-9:59 pm

1 stop15h 14m

$549

SeattleSan José

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

SEASJO

Seattle/Tacoma Intl

Fri 10/9

2:02 pm-8:30 am

2 stops17h 28m

San José Juan Santamaria Intl

Sun 10/18

4:35 pm-10:35 am

2 stops19h 00m

$562

Quickest round-trip

SeattleSan José

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

SEASJO

Seattle/Tacoma Intl

Thu 10/22

6:15 am-7:40 pm

2 stops12h 25m

San José Juan Santamaria Intl

Thu 10/29

9:00 am-12:40 am

2 stops16h 40m

$565

SeattleSan José

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

SEASJO

Seattle/Tacoma Intl

Mon 10/19

3:55 pm-12:00 pm

1 stop19h 05m

San José Juan Santamaria Intl

Mon 10/26

1:25 pm-10:03 am

1 stop21h 38m

$589

SeattleSan José

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

SEASJO

Seattle/Tacoma Intl

Fri 10/23

10:35 pm-12:00 pm

1 stop12h 25m

San José Juan Santamaria Intl

Fri 10/30

1:25 pm-10:03 am

1 stop21h 38m

$589

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 $557, 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 November is your next best option. Flight prices from Seattle to Costa Rica during November average around $612.

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 $679 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 $633 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 16% 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	$204
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 $204. The best round-trip flight deal from Seattle to Costa Rica found on momondo in the last 72 hours is $440.

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 September 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
American Airlines	PriceFrom $316	Free Cancellation	Rating 7.1 12,050 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $357	Free Cancellation	Rating 7.9 12,917 reviews	Search Alaska Airlines flights
JetBlue	PriceFrom $362	Free Cancellation	Rating 7.1 3,040 reviews	Search JetBlue flights
Delta	PriceFrom $369	Free Cancellation	Rating 7.8 8,565 reviews	Search Delta flights
Air Canada	PriceFrom $384	Free Cancellation	Rating 7.1 11,617 reviews	Search Air Canada flights
United Airlines	PriceFrom $390	Free Cancellation	Rating 7.4 10,205 reviews	Search United Airlines flights
Southwest	PriceFrom $516	Free Cancellation	Rating 8.0 4,191 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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Mon 10/12

Mon 10/19

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Costa Rica

Popular cities

Other flights from Seattle

Other flights to Costa Rica

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in Costa Rica

Flights to San Joséfrom $212

Flights to Liberiafrom $303

Flights to Limon

Flights to Tamarindo

Flights to Tortuguero

Flights to Golfito

Flights to Tambor

Cheap flights from Seattle to Costa Rica from $204

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 12/5. 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

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

United Airlines flights from Seattle to Costa Rica

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

GOL flights from Seattle to Costa Rica

Our best GOL 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