Costa Rica

$219+ Cheap flights from Seattle (SEA) to Costa Rica

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
Jul 29 — Aug 51
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Cheap flight deals from Seattle to Costa Rica

Cheapest flights from Seattle to Costa Rica
Explore the most affordable flight options available from Seattle to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 29, 2026.

This American Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:34 pm
SEA
-
SJO
1 stop19h 23m
American Airlines
Thu 10/11:00 pm
SJO
-
SEA
1 stop11h 58m
American Airlines
Deal found 6/24$480
This American Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/212:05 pm
SEA
-
SJO
1 stop22h 53m
American Airlines
Fri 10/3012:57 pm
SJO
-
SEA
1 stop10h 23m
American Airlines
Deal found 6/24$489
This American Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1411:30 pm
SEA
-
SJO
1 stop13h 28m
American Airlines
Sun 10/252:45 pm
SJO
-
SEA
2 stops21h 23m
American Airlines
Deal found 6/25$490
This American Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:21 pm
SEA
-
SJO
1 stop14h 42m
American Airlines
Mon 9/141:00 pm
SJO
-
SEA
1 stop26h 52m
American Airlines
Deal found 6/26$492
This American Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1511:57 pm
SEA
-
SJO
2 stops19h 10m
American Airlines
Sat 9/261:00 pm
SJO
-
SEA
1 stop21h 25m
American Airlines
Deal found 6/28$496
This Booking.com deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:51 pm
SEA
-
SJO
2 stops47h 39m
Alaska Airlines
Mon 10/57:00 am
SJO
-
SEA
2 stops16h 25m
Alaska Airlines
Deal found 6/26$499
This American Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:31 pm
SEA
-
SJO
1 stop19h 21m
American Airlines
Mon 9/76:00 am
SJO
-
SEA
1 stop19h 20m
American Airlines
Deal found 6/26$505
This Southwest deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:40 am
SEA
-
SJO
2 stops11h 00m
Southwest
Sat 9/269:30 am
SJO
-
SEA
2 stops14h 25m
Southwest
Deal found 6/27$517
This Southwest deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/228:55 am
SEA
-
SJO
1 stop8h 45m
Southwest
Tue 9/299:00 am
SJO
-
SEA
2 stops15h 35m
Southwest
Deal found 6/24$522
This Avianca deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/610:03 am
SEA
-
SJO
2 stops12h 12m
Multiple Airlines
Tue 8/185:45 am
SJO
-
SEA
2 stops13h 25m
Multiple Airlines
Deal found 6/25$525
This Avianca deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:05 am
SEA
-
SJO
2 stops12h 10m
Multiple Airlines
Fri 10/305:45 am
SJO
-
SEA
2 stops16h 08m
Multiple Airlines
Deal found 6/24$526
This American Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1210:08 pm
SEA
-
LIR
1 stop12h 17m
American Airlines
Wed 12/161:25 pm
LIR
-
SEA
1 stop11h 51m
American Airlines
Deal found 6/27$530

Find flight deals from Seattle to Costa Rica

Keep the following information in mind while searching for Seattle to Costa Rica flight deals. Data was last updated June 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$480
(American Airlines)

One-way from

$219
(American Airlines)

Popular in

April

Cheapest in

October

Average price

$766
Provider with most accurate pricing for Seattle/Tacoma Intl-San José Juan Santamaria Intl flight deals.
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-San José Juan Santamaria Intl flights.
From Seattle/Tacoma Intl to Costa Rica
One-way flight from Seattle/Tacoma Intl to Costa Rica
Highest demand for flights based on searches. 11% potential increase in price ($83 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
Average for round-trip flights in June 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Costa Rica 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, Cheapflights users made 2,558,603 searches. Data last updated June 29, 2026.
Use the filters below to find and compare flights from Seattle to Costa Rica that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 8/17

7:35 pm-12:21 pm

2 stops15h 46m

San José Juan Santamaria Intl

Mon 8/24

8:45 am-6:29 pm

1 stop10h 44m

$558

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Wed 9/2

5:00 am-7:37 pm

2 stops13h 37m

San José Juan Santamaria Intl

Sat 9/12

8:45 am-8:43 pm

1 stop12h 58m

$609

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Tue 8/25

3:50 pm-12:00 pm

1 stop19h 10m

Liberia

Mon 8/31

1:25 pm-11:57 pm

1 stop11h 32m

$662
Quickest round-trip

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Fri 9/25

11:13 pm-11:53 am

1 stop11h 40m

Liberia

Sun 10/25

1:20 pm-10:55 pm

1 stop10h 35m

$676

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Fri 9/11

7:25 pm-12:45 pm

2 stops16h 20m

Liberia

Sun 9/20

2:10 pm-11:35 pm

1 stop10h 25m

$683

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 11/2

4:20 pm-11:08 pm

1 stop28h 48m

San José Juan Santamaria Intl

Tue 11/3

1:43 am-12:40 pm

1 stop12h 57m

$683

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 9/19

3:30 pm-12:21 pm

2 stops19h 51m

San José Juan Santamaria Intl

Sat 9/26

7:55 am-11:26 pm

3 stops16h 31m

$683

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 9/29

7:11 am-7:37 pm

1 stop11h 26m

San José Juan Santamaria Intl

Wed 10/14

7:55 am-11:26 pm

2 stops16h 31m

$693

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 7/23

6:00 am-10:11 am

2 stops27h 11m

San José Juan Santamaria Intl

Mon 7/27

12:30 am-11:10 pm

3 stops23h 40m

$693

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 8/1

8:45 am-5:30 am

2 stops19h 45m

San José Juan Santamaria Intl

Sat 8/8

6:00 am-7:38 pm

1 stop14h 38m

$693

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/27

Showing 1-10 of 40 resultsSorted by cheapest first
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Best time to book a flight from Seattle to Costa Rica

Have a flexible travel schedule? Discover the best time to fly to Costa Rica from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Costa Rica

What is the cheapest month to book a flight from Seattle to Costa Rica?

Currently, December is the cheapest month in which you can book a flight from Seattle to Costa Rica (average of $166). Flying from Seattle to Costa Rica in July is currently the most expensive (average of $519). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

The best time to book flights from Seattle to Costa Rica is 37 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Costa Rica

Get insights into the airlines that provide service to Costa Rica. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Costa Rica. Reviews last updated June 29, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Southwest, andDelta from Seattle to Costa Rica by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Overall

7.9

Food

7.0

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Overall

7.9

Food

7.0

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Overall

7.9

Food

7.0

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Overall

7.9

Food

7.0

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Overall

7.9

Food

7.0

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Overall

7.9

Food

7.0

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Costa Rica. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly from for flights from Seattle to Costa Rica?

    For a flight from Seattle to Costa Rica, you will be flying from Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city.

  • How long is the flight from Seattle to Costa Rica?

    Airlines like United Airlines, Delta, and Southwest fly from Seattle to Costa Rica in about 15h 46m. The time it takes to get you to your destination can typically vary by up to 3h 24m. The distance from Seattle to Costa Rica is about 3405 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Seattle to Costa Rica one-way?

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $156. Users have also found prices from $168 and $177 on Alaska Airlines and Southwest, respectively.

  • Can I find deals for flights from Seattle to Costa Rica that include hotel bookings?

    Yes. In addition to deals on Seattle to Costa Rica flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Costa Rica?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Costa Rica.

  • Can I find deals for business class flights from Seattle to Costa Rica?

    Yes. Cheapflights offers flight deals from Seattle to Costa Rica by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Costa Rica?

    Currently, December is the cheapest month in which you can book a flight from Seattle to Costa Rica (average of $166). Flying from Seattle to Costa Rica in July is currently the most expensive (average of $519). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Seattle to Costa Rica

Discover the top 6 airlines that operate flights from Seattle to Costa Rica. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$316Average$638FlexibilityNo cancel feeOn-time71%
DeltaCheapest$345Average$751FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$357Average$620FlexibilityNo cancel feeOn-time75%
JetBlueCheapest$362Average$682FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$366Average$672FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$516Average$703FlexibilityNo cancel feeOn-time63%

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