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$152+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
Oct 14 — Oct 211
Tue 10/14
Tue 10/21
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 September 14, 2025.

Round-trip from

$354
(Kiwi.com)

One-way from

$152
(American Airlines)

Popular in

December

Cheapest in

September

Average price

$527

Good round-trip deal

$524 or less
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. 9% potential increase in price ($70 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 September 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Costa Rica.
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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 September 14, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/12. 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.
Sun 10/267:15 amSEA - SJO
1 stop15h 36mMultiple Airlines
Fri 11/72:20 amSJO - SEA
2 stops35h 53mMultiple Airlines
Deal found 9/12$354
This American Airlines deal was found by Cheapflights users on 9/13. 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 10/138:49 pmSEA - SJO
1 stop14h 11mAmerican Airlines
Mon 10/201:00 pmSJO - SEA
1 stop11h 41mAmerican Airlines
Deal found 9/13$356
This American Airlines deal was found by Cheapflights users on 9/12. 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 11/55:00 pmSEA - LIR
1 stop19h 07mAmerican Airlines
Sat 11/82:37 pmLIR - SEA
1 stop21h 48mAmerican Airlines
Deal found 9/12$357
This Alaska Airlines deal was found by Cheapflights users on 9/13. 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.
Mon 10/2710:20 amSEA - SJO
1 stop12h 31mAlaska Airlines
Mon 11/31:55 amSJO - SEA
1 stop11h 11mAlaska Airlines
Deal found 9/13$358
This Trip.com deal was found by Cheapflights users on 9/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:23 amSEA - SJO
1 stop11h 15mAlaska Airlines
Sun 11/161:55 amSJO - SEA
1 stop23h 39mAlaska Airlines
Deal found 9/12$365
This American Airlines deal was found by Cheapflights users on 9/13. 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 11/612:59 amSEA - SJO
1 stop19h 14mAmerican Airlines
Tue 11/112:59 pmSJO - SEA
1 stop20h 50mAmerican Airlines
Deal found 9/13$369
This Alaska Airlines deal was found by Cheapflights users on 9/12. 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.
Sun 11/98:05 amSEA - SJO
1 stop14h 33mAlaska Airlines
Fri 11/141:55 amSJO - SEA
1 stop20h 03mAlaska Airlines
Deal found 9/12$370
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Sat 10/187:37 pmSEA - SJO
2 stops15h 49mUnited Airlines
Tue 11/252:20 pmSJO - SEA
1 stop10h 26mUnited Airlines
Deal found 9/13$373
This American Airlines deal was found by Cheapflights users on 9/13. 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 11/19:20 pmSEA - SJO
1 stop15h 19mAmerican Airlines
Sun 11/166:22 amSJO - SEA
1 stop20h 36mAmerican Airlines
Deal found 9/13$375
This Alaska Airlines deal was found by Cheapflights users on 9/13. 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 11/57:57 pmSEA - SJO
1 stop26h 41mAlaska Airlines
Fri 11/71:55 amSJO - SEA
1 stop20h 03mAlaska Airlines
Deal found 9/13$377
This American Airlines deal was found by Cheapflights users on 9/12. 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 11/2812:59 amSEA - LIR
1 stop11h 08mAmerican Airlines
Sat 12/132:40 pmLIR - SEA
1 stop21h 37mAmerican Airlines
Deal found 9/12$429
This American Airlines deal was found by Cheapflights users on 9/12. 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 9/238:51 pmSEA - LIR
1 stop13h 58mAmerican Airlines
Sat 9/272:02 pmLIR - SEA
1 stop20h 17mAmerican Airlines
Deal found 9/12$431

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 September 14, 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

Mon 11/10

10:20 am-12:38 am

1 stop12h 18m

San José Juan Santamaria Intl

Wed 11/12

1:55 am-9:02 pm

1 stop21h 07m

$370

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 12/6

11:00 pm-1:06 pm

1 stop12h 06m

San José Juan Santamaria Intl

Fri 12/12

7:00 am-11:58 pm

1 stop18h 58m

$370

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 11/9

6:25 am-12:38 am

1 stop16h 13m

San José Juan Santamaria Intl

Tue 11/11

1:55 am-9:02 pm

1 stop21h 07m

$370

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 11/6

8:00 am-12:38 am

2 stops14h 38m

San José Juan Santamaria Intl

Wed 11/12

1:55 am-11:32 pm

2 stops23h 37m

$374

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 11/6

8:00 am-12:38 am

2 stops14h 38m

San José Juan Santamaria Intl

Fri 11/7

1:55 am-9:02 pm

1 stop21h 07m

$374

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 11/4

5:20 am-12:38 am

2 stops17h 18m

San José Juan Santamaria Intl

Fri 11/7

1:55 am-7:58 pm

1 stop20h 03m

$374

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 11/6

8:00 am-12:38 am

2 stops14h 38m

San José Juan Santamaria Intl

Thu 11/13

1:55 am-11:32 pm

2 stops23h 37m

$374

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 11/4

9:35 am-12:38 am

2 stops13h 03m

San José Juan Santamaria Intl

Mon 11/10

1:55 am-1:02 pm

1 stop13h 07m

$374

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 11/6

5:20 am-12:38 am

2 stops17h 18m

San José Juan Santamaria Intl

Tue 11/11

1:55 am-6:48 pm

2 stops18h 53m

$374

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Wed 11/5

7:57 pm-12:38 am

1 stop26h 41m

San José Juan Santamaria Intl

Tue 11/11

1:55 am-11:06 am

1 stop11h 11m

$377

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Showing 1-10 of 37 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 September 14, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 76% 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 September 14, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and Aeromexico 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

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

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

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

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
7,959 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

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.
Aeromexico
7.5
Good
1,699 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

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
8,934 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

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

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

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.

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

    Airlines like Alaska Airlines, Delta, and United Airlines fly from Seattle to Costa Rica in about 9h 03m. The time it takes to get you to your destination can typically vary by up to 5h 48m. The distance from Seattle to Costa Rica is about 3321 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 $157. Users have also found prices from $163 and $166 on Delta and American 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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Spokane to Managua flights
Wenatchee to Philip S.W.Goldson flights
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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 September 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$152Average$217FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$308Average$387FlexibilityNo cancel feeOn-time65%
DeltaCheapest$393Average$726FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$423Average$783FlexibilityNo cancel feeOn-time70%
Alaska AirlinesCheapest$426Average$643FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$452Average$629FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$491Average$704FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$543Average$661FlexibilityNo cancel feeOn-time63%
AeromexicoCheapest$709Average$987FlexibilityNo cancel feeOn-timeN/A

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