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$122+ Cheap flights from Washington 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 2/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Washington to Costa Rica

Cheapest flights from Washington to Costa Rica
Explore the most affordable flight options available from Washington to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/317:12 pmSEA - LIR
2 stops14h 12mUnited Airlines
Mon 1/1212:50 pmLIR - SEA
1 stop10h 25mUnited Airlines
Deal found 12/16$397
This Delta deal was found by Cheapflights users on 12/17. 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 12/306:10 pmSEA - LIR
1 stop17h 20mDelta
Sat 1/101:40 pmLIR - SEA
1 stop23h 05mDelta
Deal found 12/17$435
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/187:00 amPDX - SJO
1 stop9h 16mUnited Airlines
Sat 12/207:30 amSJO - PDX
1 stop15h 37mUnited Airlines
Deal found 12/17$438
This United Airlines deal was found by Cheapflights users on 12/15. 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 12/157:34 pmSEA - SJO
1 stop10h 58mUnited Airlines
Mon 12/226:40 amSJO - SEA
1 stop11h 44mUnited Airlines
Deal found 12/15$449
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/305:00 amSEA - LIR
1 stop11h 37mUnited Airlines
Thu 1/82:20 pmLIR - SEA
1 stop10h 39mUnited Airlines
Deal found 12/16$465
This American Airlines deal was found by Cheapflights users on 12/15. 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 12/1510:07 pmSEA - SJO
1 stop11h 45mAmerican Airlines
Fri 12/196:20 amSJO - SEA
1 stop19h 22mAmerican Airlines
Deal found 12/15$475
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/306:45 amSEA - LIR
1 stop9h 52mUnited Airlines
Tue 1/138:35 amLIR - SEA
1 stop16h 24mUnited Airlines
Deal found 12/17$477
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/185:02 amSEA - SJO
1 stop14h 58mUnited Airlines
Wed 12/246:30 amSJO - SEA
2 stops13h 36mUnited Airlines
Deal found 12/16$477
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Wed 12/3111:59 pmSEA - LIR
1 stop9h 25mUnited Airlines
Fri 1/168:35 amLIR - SEA
2 stops18h 24mUnited Airlines
Deal found 12/17$481
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/185:02 amSEA - SJO
1 stop14h 58mUnited Airlines
Wed 12/316:30 amSJO - SEA
2 stops20h 29mUnited Airlines
Deal found 12/17$490
This Southwest deal was found by Cheapflights users on 12/15. 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 12/152:20 pmSEA - SJO
2 stops20h 55mSouthwest
Fri 12/199:00 amSJO - SEA
2 stops17h 55mSouthwest
Deal found 12/15$493
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/235:00 amSEA - LIR
2 stops33h 08mUnited Airlines
Wed 1/148:35 amLIR - SEA
1 stop16h 24mUnited Airlines
Deal found 12/17$497

Find flight deals from Washington to Costa Rica

Keep the following information in mind while searching for Washington to Costa Rica flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$276
(American Airlines)

One-way from

$122
(American Airlines)

Popular in

December

Cheapest in

October

Average price

$766

Good round-trip deal

$782 or less
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 Washington to Costa Rica
Search Deals
One-way flight from Washington to Costa Rica
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Washington to Costa Rica.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 December 18, 2025.
Use the filters below to find and compare flights from Washington to Costa Rica that are best for you.

Fly from

Washington

Fly to

Costa Rica

Route

Depart

Return

Price

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Tue 1/20

11:01 pm-2:13 pm

1 stop13h 12m

Liberia

Thu 1/29

1:21 pm-11:46 pm

1 stop12h 25m

$345

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Sun 3/1

11:59 pm-12:10 pm

1 stop10h 11m

Liberia

Wed 3/4

1:20 pm-11:59 pm

1 stop12h 39m

$345

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Sun 2/1

11:59 pm-2:20 pm

1 stop12h 21m

Liberia

Wed 2/11

1:21 pm-11:46 pm

1 stop12h 25m

$345

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Sun 2/1

5:25 pm-1:50 pm

2 stops18h 25m

Liberia

Wed 2/11

2:05 pm-12:02 pm

2 stops23h 57m

$349

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Mon 1/5

7:45 pm-1:10 pm

2 stops15h 25m

Liberia

Tue 1/13

8:35 am-9:12 pm

2 stops14h 37m

$349

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Sun 3/1

5:10 pm-1:50 pm

2 stops18h 40m

Liberia

Wed 3/4

2:05 pm-9:25 am

2 stops21h 20m

$349

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Mon 1/19

12:40 am-1:30 pm

1 stop10h 50m

Liberia

Thu 1/29

3:05 pm-4:25 pm

2 stops27h 20m

$349

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Tue 2/17

10:40 pm-2:18 pm

2 stops13h 38m

Liberia

Wed 2/25

1:27 pm-10:49 am

2 stops23h 22m

$349

PortlandSan José

PDX - SJO

PDXSJO

Portland

Mon 3/9

7:16 am-12:08 am

1 stop15h 52m

San José Juan Santamaria Intl

Tue 3/10

1:28 am-1:25 pm

1 stop12h 57m

$350

PortlandSan José

PDX - SJO

PDXSJO

Portland

Mon 2/2

7:52 pm-1:00 pm

2 stops15h 08m

San José Juan Santamaria Intl

Fri 2/6

7:00 am-10:20 pm

2 stops17h 20m

$351

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 60 results
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Best time to book a flight from Washington to Costa Rica

Have a flexible travel schedule? Discover the best time to fly to Costa Rica from Washington 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 Washington to Costa Rica

What is the cheapest month to book a flight from State of Washington to Costa Rica?

Currently, August is the cheapest month in which you can book a flight from State of Washington to Costa Rica (average of $174). Flying from State of Washington to Costa Rica in July is currently the most expensive (average of $502). 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 WA to CR?

Find hourly flight availability from Washington 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 December 18, 2025.

A simple way to save on the total cost of your ticket is to fly from State of Washington to Costa Rica in the afternoon. If you’re flexible enough to do this you can expect to save up to 29% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from State of Washington to Costa Rica?

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

Travelers seeking maximum savings on their State of Washington to Costa Rica flight should consider departing on Monday at noon 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.

Related info for your journey

Find useful and relevant information for your journey from Washington to Costa Rica. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from State of Washington to Costa Rica?

    A quick flight from State of Washington to Costa Rica can take about 13h 12m. American Airlines provides one of the quickest options available for as low as $345. State of Washington and Costa Rica are separated by a distance of 3254 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from State of Washington to Costa Rica one-way?

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $141. United Airlines flights start at $151 while deals on Alaska Airlines start at $161 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Costa Rica?

    Currently, August is the cheapest month in which you can book a flight from State of Washington to Costa Rica (average of $174). Flying from State of Washington to Costa Rica in July is currently the most expensive (average of $502). 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 Washington to Costa Rica

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Washington to Costa Rica

Discover the top 7 airlines that operate flights from Washington 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$152Average$192FlexibilityNo cancel feeOn-time71%
DeltaCheapest$280Average$706FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$287Average$585FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$297Average$635FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$311Average$573FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$530Average$698FlexibilityNo cancel feeOn-time63%
AeromexicoCheapest$809Average$981FlexibilityNo cancel feeOn-timeN/A

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