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$176+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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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 July 30, 2025.

Round-trip from

$393
(American Airlines)

One-way from

$176
(Avianca)

Popular in

December

Cheapest in

May

Average price

$631
From Seattle/Tacoma Intl to Costa Rica
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One-way flight from Seattle/Tacoma Intl to Costa Rica
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Highest demand for flights based on searches. 7% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 30, 2025.

This American Airlines deal was found by Cheapflights users on 7/29. 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 9/245:43 pmSEA - LIR
1 stop18h 18mAmerican Airlines
Tue 9/3012:49 pmLIR - SEA
1 stop12h 10mAmerican Airlines
Deal found 7/29$393
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 9/247:50 amSEA - LIR
2 stops21h 30mAlaska Airlines
Tue 9/3011:20 amLIR - SEA
2 stops24h 19mAlaska Airlines
Deal found 7/30$420
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/911:58 pmSEA - LIR
1 stop11h 12mUnited Airlines
Fri 9/121:20 pmLIR - SEA
1 stop10h 32mUnited Airlines
Deal found 7/29$445
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Fri 8/295:24 amSEA - SJO
1 stop11h 51mAmerican Airlines
Mon 9/16:00 amSJO - SEA
1 stop19h 14mAmerican Airlines
Deal found 7/30$458
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/48:42 amSEA - SJO
2 stops13h 56mAlaska Airlines
Sun 11/161:58 amSJO - SEA
1 stop14h 33mAlaska Airlines
Deal found 7/28$460
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1111:20 pmSEA - LIR
1 stop11h 40mDelta
Thu 9/181:25 pmLIR - SEA
1 stop11h 29mDelta
Deal found 7/28$465
This Vliegwinkel deal was found by Cheapflights users on 7/28. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/143:59 pmSEA - SJO
2 stops14h 41mMultiple Airlines
Thu 8/285:10 pmSJO - SEA
1 stop17h 30mMultiple Airlines
Deal found 7/28$467
This Southwest deal was found by Cheapflights users on 7/27. 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 8/265:15 amSEA - SJO
2 stops12h 40mSouthwest
Tue 9/28:50 amSJO - SEA
2 stops13h 05mSouthwest
Deal found 7/27$481
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/307:28 pmSEA - SJO
2 stops13h 57mUnited Airlines
Mon 11/39:40 amSJO - SEA
1 stop10h 45mUnited Airlines
Deal found 7/28$498
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/55:50 amSEA - LIR
2 stops30h 55mAir Canada
Sat 11/83:45 pmLIR - SEA
1 stop32h 11mAir Canada
Deal found 7/29$502

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 July 30, 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

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Wed 9/24

5:43 pm-1:01 pm

1 stop18h 18m

Liberia

Tue 9/30

12:49 pm-11:59 pm

1 stop12h 10m

$393

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Wed 9/24

7:50 am-6:20 am

2 stops21h 30m

Liberia

Tue 9/30

11:20 am-10:39 am

2 stops24h 19m

$420

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Tue 9/9

11:58 pm-12:10 pm

1 stop11h 12m

Liberia

Fri 9/12

1:20 pm-10:52 pm

1 stop10h 32m

$445

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Fri 8/29

5:24 am-6:15 pm

1 stop11h 51m

San José Juan Santamaria Intl

Mon 9/1

6:00 am-12:14 am

1 stop19h 14m

$458

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Thu 9/11

11:20 pm-12:00 pm

1 stop11h 40m

Liberia

Thu 9/18

1:25 pm-11:54 pm

1 stop11h 29m

$465

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 8/14

3:59 pm-7:40 am

2 stops14h 41m

San José Juan Santamaria Intl

Thu 8/28

5:10 pm-9:40 am

1 stop17h 30m

$467

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 8/26

5:15 am-6:55 pm

2 stops12h 40m

San José Juan Santamaria Intl

Tue 9/2

8:50 am-8:55 pm

2 stops13h 05m

$481

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Fri 8/29

7:34 pm-7:15 am

1 stop10h 41m

San José Juan Santamaria Intl

Sun 9/7

8:37 am-10:59 pm

1 stop15h 22m

$498

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 10/4

8:00 am-7:04 pm

1 stop10h 04m

San José Juan Santamaria Intl

Sun 10/12

6:30 am-8:26 am

2 stops26h 56m

$506

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 9/7

10:55 pm-7:40 am

2 stops31h 45m

San José Juan Santamaria Intl

Thu 9/11

4:20 pm-8:42 pm

2 stops29h 22m

$534

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 24 results
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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, 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 July 30, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 72% 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.

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 July 30, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 Alaska Airlines. According to our data, you can fly for as low as $181. Users have also found prices from $183 and $195 on American Airlines and Spirit Airlines, 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

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Alternative routes for Seattle to Costa Rica

See prices for flight routes from nearby airports that may be better suited for you.
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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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$152Average$217FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$308Average$387FlexibilityNo cancel feeOn-time65%
Copa AirlinesCheapest$423Average$783FlexibilityNo cancel feeOn-time70%
Alaska AirlinesCheapest$443Average$657FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$451Average$635FlexibilityNo cancel feeOn-time71%
DeltaCheapest$486Average$703FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$492Average$711FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$521Average$639FlexibilityNo cancel feeOn-time63%
AeromexicoCheapest$734Average$974FlexibilityNo cancel feeOn-timeN/A

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