HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Costa Rica

$153+ 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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
Apr 27 — May 41
Sun 4/27
Sun 5/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Costa Rica with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 April 22, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$426
(Kiwi.com)

One-way from

$153
(Trip.com)

Popular in

December

Cheapest in

May

Average price

$725
Provider with most accurate pricing for Seattle/Tacoma Intl-San José Juan Santamaria Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-San José Juan Santamaria Intl flights.
Search Deals
From Seattle/Tacoma Intl to Costa Rica
Search Deals
One-way flight from Seattle/Tacoma Intl to Costa Rica
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find 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 April 22, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/512:18 pmSEA - SJO
2 stops21h 09mMultiple Airlines
Wed 6/1112:50 amSJO - SEA
1 stop23h 09mMultiple Airlines
Deal found 4/21$426
This American Airlines deal was found by Cheapflights users on 4/21. 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 6/55:32 amSEA - SJO
1 stop15h 32mAmerican Airlines
Thu 6/126:10 amSJO - SEA
1 stop18h 37mAmerican Airlines
Deal found 4/21$427
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2712:00 pmSEA - SJO
1 stop10h 46mAlaska Airlines
Tue 6/31:06 amSJO - SEA
1 stop16h 47mAlaska Airlines
Deal found 4/21$428
This United Airlines deal was found by Cheapflights users on 4/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2311:58 pmSEA - LIR
1 stop11h 12mUnited Airlines
Fri 9/261:20 pmLIR - SEA
1 stop10h 57mUnited Airlines
Deal found 4/21$442
This United Airlines deal was found by Cheapflights users on 4/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/153:19 pmSEA - SJO
1 stop14h 56mUnited Airlines
Tue 9/308:37 amSJO - SEA
1 stop11h 12mUnited Airlines
Deal found 4/21$442
This Mytrip deal was found by Cheapflights users on 4/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/123:20 pmSEA - SJO
2 stops19h 13mSpirit Airlines
Tue 5/2712:28 pmSJO - SEA
2 stops26h 57mSpirit Airlines
Deal found 4/21$462
This American Airlines deal was found by Cheapflights users on 4/21. 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 10/411:00 pmSEA - LIR
1 stop11h 15mAmerican Airlines
Sun 10/1212:55 pmLIR - SEA
1 stop11h 19mAmerican Airlines
Deal found 4/21$473
This American Airlines deal was found by Cheapflights users on 4/21. 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.
Mon 9/2212:58 amSEA - LIR
1 stop11h 03mMultiple Airlines
Fri 9/2612:55 pmLIR - SEA
1 stop12h 38mMultiple Airlines
Deal found 4/21$490
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/207:55 pmSEA - LIR
1 stop9h 25mAlaska Airlines
Tue 9/2311:20 amLIR - SEA
1 stop10h 46mAlaska Airlines
Deal found 4/21$503
This Delta deal was found by Cheapflights users on 4/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2911:35 pmSEA - SJO
1 stop11h 13mDelta
Thu 8/71:08 pmSJO - SEA
1 stop12h 00mDelta
Deal found 4/21$509
This Southwest deal was found by Cheapflights users on 4/21. 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.
Mon 6/237:50 pmSEA - LIR
2 stops16h 20mSouthwest
Sat 6/282:05 pmLIR - SEA
2 stops20h 25mSouthwest
Deal found 4/21$564
This Southwest deal was found by Cheapflights users on 4/21. 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.
Sat 5/314:55 pmSEA - SJO
2 stops18h 15mSouthwest
Thu 6/58:45 amSJO - SEA
2 stops16h 40mSouthwest
Deal found 4/21$572

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 April 22, 2025.
Use the filters below to find and compare flights from Seattle to Costa Rica that are best for you.

Fly from

Seattle

Fly to

Costa Rica

Route

Depart

Return

Price

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 6/5

12:18 pm-10:27 am

2 stops21h 09m

San José Juan Santamaria Intl

Wed 6/11

12:50 am-10:59 pm

1 stop23h 09m

$426

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 6/5

5:32 am-10:04 pm

1 stop15h 32m

San José Juan Santamaria Intl

Thu 6/12

6:10 am-11:47 pm

1 stop18h 37m

$427

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 5/27

12:00 pm-11:46 pm

1 stop10h 46m

San José Juan Santamaria Intl

Tue 6/3

1:06 am-4:53 pm

1 stop16h 47m

$428

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Tue 9/23

5:35 pm-12:10 pm

2 stops17h 35m

Liberia

Fri 9/26

1:20 pm-11:17 pm

1 stop10h 57m

$442

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 9/15

3:19 pm-7:15 am

1 stop14h 56m

San José Juan Santamaria Intl

Tue 9/30

8:37 am-6:49 pm

1 stop11h 12m

$442

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 5/12

3:20 pm-11:33 am

2 stops19h 13m

San José Juan Santamaria Intl

Tue 5/27

12:28 pm-2:25 pm

2 stops26h 57m

$462

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Sat 10/4

11:00 pm-11:15 am

1 stop11h 15m

Liberia

Sun 10/12

12:55 pm-11:14 pm

1 stop11h 19m

$473

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Mon 9/22

12:58 am-1:01 pm

1 stop11h 03m

Liberia

Fri 9/26

12:55 pm-12:33 am

1 stop12h 38m

$490

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Sat 9/20

7:55 pm-6:20 am

1 stop9h 25m

Liberia

Fri 9/26

11:20 am-9:06 pm

1 stop10h 46m

$503

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 7/29

11:35 pm-11:48 am

1 stop11h 13m

San José Juan Santamaria Intl

Thu 8/7

1:08 pm-12:08 am

1 stop12h 00m

$509

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 31 results
1
2
3
4

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, September is the cheapest month in which you can book a flight from Seattle to Costa Rica (average of $398). Flying from Seattle to Costa Rica in March is currently the most expensive (average of $555). 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.

What is the cheapest time of day to fly from SEA to CR?

Find hourly flight availability from Seattle to Costa Rica. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 22, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 71% on flights from Seattle to Costa Rica by exploring options for tickets in the morning.

What is the cheapest day to fly from Seattle to Costa Rica?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Costa Rica. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Costa Rica flight should consider departing on Saturday mornings when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Costa Rica ranges from 0.0 - 11.8 inches per month. September is typically the wettest month, when rainfall can reach 11.8 in. February is typically the driest time to visit Costa Rica when rainfall is around 0.0 in.

Temperature in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Costa Rica, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 64.4 F).

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 April 22, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Seattle to Costa Rica have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,906 reviews

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Alaska Airlines
8.0
Very good
9,906 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Delta
8.0
Very good
7,920 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Copa Airlines
7.5
Good
1,408 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
United Airlines
7.4
Good
8,684 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

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.

  • 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 $186. Users have also found prices from $206 and $215 on American Airlines and Avianca, 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, September is the cheapest month in which you can book a flight from Seattle to Costa Rica (average of $398). Flying from Seattle to Costa Rica in March is currently the most expensive (average of $555). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Costa Rica

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to San José flights
Seattle to Philip S.W.Goldson flights
Seattle to Liberia flights
Seattle to Panama City flights
Portland to San José flights
Seattle to Guatemala City flights
Portland to Philip S.W.Goldson flights
Seattle to San Salvador flights
Seattle to Coxen Hole flights
Portland to Liberia flights
Portland to Panama City flights
Portland to Guatemala City flights
Seattle to Managua flights
Portland to San Salvador flights
Portland to Coxen Hole flights
Seattle to San Pedro Sula flights
Spokane to San José flights
Pasco to San José flights
Spokane to Panama City flights
Spokane to Philip S.W.Goldson flights
Portland to San Pedro Sula flights
Portland to Managua flights
Spokane to Liberia flights
Spokane to Guatemala City flights
Pasco to San Salvador flights
Wenatchee to Philip S.W.Goldson flights
Pasco to Managua flights
Spokane to Managua flights
Spokane to Coxen Hole flights
Seattle to David flights
Bellingham to San José flights
Pullman to San José flights
Pullman to Panama City flights
Pasco to Tegucigalpa flights
Pasco to Philip S.W.Goldson flights
Portland to Flores flights
Seattle to Tegucigalpa flights

Top 9 airlines flying from Seattle to Costa Rica

Discover the top 9 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 April 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$164Average$192FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$275Average$390FlexibilityNo cancel feeOn-time65%
DeltaCheapest$394Average$674FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$438Average$641FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$443Average$685FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$491Average$731FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$521Average$639FlexibilityNo cancel feeOn-time63%
Copa AirlinesCheapest$528Average$805FlexibilityNo cancel feeOn-time70%
AeromexicoCheapest$709Average$912FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.