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$138+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$464
(Alaska Airlines)

One-way from

$138
(Avianca)

Popular in

December

Cheapest in

May

Average price

$696
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. 6% potential increase in price ($48 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Alaska Airlines deal was found by Cheapflights users on 6/12. 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.
Tue 8/265:59 pmSEA - LIR
1 stop11h 21mAlaska Airlines
Thu 8/2811:20 amLIR - SEA
1 stop13h 39mAlaska Airlines
Deal found 6/12$464
This Avianca deal was found by Cheapflights users on 6/11. 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 9/48:00 amSEA - SJO
2 stops22h 40mAvianca
Thu 9/114:20 pmSJO - SEA
2 stops29h 22mAvianca
Deal found 6/11$469
This Expedia deal was found by Cheapflights users on 6/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/115:30 pmSEA - SJO
2 stops16h 41mMultiple Airlines
Fri 7/185:45 amSJO - SEA
2 stops18h 39mMultiple Airlines
Deal found 6/12$471
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Sun 7/1311:58 pmSEA - SJO
1 stop9h 13mUnited Airlines
Mon 7/218:45 amSJO - SEA
1 stop13h 11mUnited Airlines
Deal found 6/11$474
This Southwest deal was found by Cheapflights users on 6/10. 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 7/286:30 amSEA - SJO
2 stops12h 10mSouthwest
Thu 7/318:45 amSJO - SEA
2 stops16h 40mSouthwest
Deal found 6/10$477
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Sun 11/25:41 amSEA - SJO
1 stop15h 19mAmerican Airlines
Wed 11/126:29 amSJO - SEA
1 stop10h 19mAmerican Airlines
Deal found 6/12$480
This Mytrip deal was found by Cheapflights users on 6/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/13:58 pmSEA - SJO
2 stops18h 19mSpirit Airlines
Fri 7/1112:16 pmSJO - SEA
3 stops29h 09mSpirit Airlines
Deal found 6/12$493
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 10/275:50 pmSEA - SJO
2 stops53h 01mAlaska Airlines
Mon 11/31:58 amSJO - SEA
1 stop21h 03mAlaska Airlines
Deal found 6/10$497
This American Airlines deal was found by Cheapflights users on 6/10. 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 8/111:55 pmSEA - LIR
1 stop11h 30mAmerican Airlines
Thu 8/712:45 pmLIR - SEA
1 stop12h 29mAmerican Airlines
Deal found 6/10$521
This United Airlines deal was found by Cheapflights users on 6/10. 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 7/1511:58 pmSEA - LIR
1 stop13h 25mUnited Airlines
Tue 7/2211:49 amLIR - SEA
1 stop12h 10mUnited Airlines
Deal found 6/10$543
This Air Canada deal was found by Cheapflights users on 6/10. 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.
Sat 11/17:30 amSEA - LIR
1 stop28h 25mAir Canada
Thu 11/131:55 pmLIR - SEA
1 stop34h 01mAir Canada
Deal found 6/10$574
This Sun Country Air deal was found by Cheapflights users on 6/10. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:31 pmSEA - LIR
1 stop18h 00mSun Country Air
Sat 12/203:48 pmLIR - SEA
1 stop19h 54mSun Country Air
Deal found 6/10$588

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 12, 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

Tue 8/26

5:59 pm-6:20 am

1 stop11h 21m

Liberia

Thu 8/28

11:20 am-11:59 pm

1 stop13h 39m

$464

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 9/4

8:00 am-7:40 am

2 stops22h 40m

San José Juan Santamaria Intl

Thu 9/11

4:20 pm-8:42 pm

2 stops29h 22m

$469

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Fri 7/11

5:30 pm-11:11 am

2 stops16h 41m

San José Juan Santamaria Intl

Fri 7/18

5:45 am-11:24 pm

2 stops18h 39m

$471

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 7/13

11:58 pm-10:11 am

1 stop9h 13m

San José Juan Santamaria Intl

Mon 7/21

8:45 am-8:56 pm

1 stop13h 11m

$474

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 7/28

6:30 am-7:40 pm

2 stops12h 10m

San José Juan Santamaria Intl

Thu 7/31

8:45 am-12:25 am

2 stops16h 40m

$477

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 11/2

5:41 am-11:00 pm

1 stop15h 19m

San José Juan Santamaria Intl

Wed 11/12

6:29 am-2:48 pm

1 stop10h 19m

$480

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 7/1

3:58 pm-11:17 am

2 stops18h 19m

San José Juan Santamaria Intl

Fri 7/11

12:16 pm-4:25 pm

3 stops29h 09m

$493

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 10/27

7:30 pm-11:51 pm

2 stops51h 21m

San José Juan Santamaria Intl

Mon 11/3

1:58 am-11:01 pm

2 stops23h 03m

$497

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Fri 8/1

11:55 pm-12:25 pm

1 stop11h 30m

Liberia

Thu 8/7

12:45 pm-12:14 am

1 stop12h 29m

$521

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Tue 7/15

5:10 pm-10:00 am

2 stops15h 50m

Liberia

Tue 7/22

11:49 am-10:59 pm

1 stop12h 10m

$543

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 29 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 June 12, 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 June 12, 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
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Copa Airlines
7.5
Good
1,451 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
SWISS
7.5
Good
1,623 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.

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 Spirit Airlines. According to our data, you can fly for as low as $175. Users have also found prices from $187 and $191 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

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$152Average$192FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$308Average$394FlexibilityNo cancel feeOn-time65%
DeltaCheapest$394Average$677FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$444Average$676FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$452Average$639FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$481Average$715FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$521Average$639FlexibilityNo cancel feeOn-time63%
Copa AirlinesCheapest$634Average$805FlexibilityNo cancel feeOn-time70%
AeromexicoCheapest$734Average$953FlexibilityNo cancel feeOn-timeN/A

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