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$138+ 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 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
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheap 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 junio 12, 2025.

Round-trip from

$313
(Alaska Airlines)

One-way from

$138
(Avianca)

Popular in

December

Cheapest in

May

Average price

$696
From Washington to Costa Rica
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One-way flight from Washington 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 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 junio 12, 2025.

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.
lun. 8/117:35 pmPDX - LIR
1 stop19h 18mAlaska Airlines
mar. 8/194:58 pmLIR - PDX
1 stop17h 27mAlaska Airlines
Deal found 6/10$313
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 7/2812:59 amPDX - LIR
1 stop12h 46mAmerican Airlines
jue. 8/142:26 pmLIR - PDX
2 stops19h 58mAmerican Airlines
Deal found 6/11$317
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.
mar. 9/239:56 pmPDX - SJO
2 stops20h 46mAmerican Airlines
vie. 10/102:25 pmSJO - PDX
2 stops21h 06mAmerican Airlines
Deal found 6/12$340
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.
mar. 9/237:04 amPDX - SJO
1 stop11h 33mUnited Airlines
vie. 10/108:37 amSJO - PDX
1 stop15h 08mUnited Airlines
Deal found 6/11$348
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.
sáb. 10/411:55 pmPDX - LIR
1 stop11h 15mUnited Airlines
mié. 10/81:20 pmLIR - PDX
1 stop10h 07mUnited Airlines
Deal found 6/10$353
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/15:10 pmPDX - SJO
2 stops18h 38mDelta
mar. 11/187:00 amSJO - PDX
1 stop14h 08mDelta
Deal found 6/10$370
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/812:12 pmPDX - SJO
2 stops21h 59mSpirit Airlines
lun. 7/1412:16 pmSJO - PDX
2 stops22h 02mSpirit Airlines
Deal found 6/12$390
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.
mar. 7/812:12 pmPDX - SJO
2 stops21h 59mMultiple Airlines
lun. 7/142:48 pmSJO - PDX
3 stops24h 27mMultiple Airlines
Deal found 6/12$405
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.
dom. 11/25:10 amGEG - LIR
1 stop8h 58mUnited Airlines
mar. 11/1112:50 pmLIR - GEG
1 stop9h 55mUnited Airlines
Deal found 6/10$405
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/253:53 pmGEG - LIR
2 stops20h 09mAmerican Airlines
mar. 11/43:00 pmLIR - GEG
2 stops23h 53mAmerican Airlines
Deal found 6/11$409
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/41:37 pmGEG - SJO
2 stops21h 18mUnited Airlines
mar. 7/225:30 amSJO - GEG
2 stops16h 33mUnited Airlines
Deal found 6/12$420
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.
sáb. 9/2012:35 pmGEG - SJO
2 stops21h 37mAmerican Airlines
sáb. 9/277:21 amSJO - GEG
1 stop16h 31mAmerican Airlines
Deal found 6/12$423

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 junio 12, 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

lun. 8/11

7:35 pm-3:53 pm

1 stop19h 18m

Liberia

mar. 8/19

4:58 pm-9:25 am

1 stop17h 27m

$313

PortlandLiberia

PDX - LIR

PDXLIR

Portland

lun. 7/28

12:59 am-2:45 pm

1 stop12h 46m

Liberia

jue. 8/14

2:26 pm-9:24 am

2 stops19h 58m

$317

PortlandSan José

PDX - SJO

PDXSJO

Portland

mar. 9/23

9:56 pm-7:42 pm

2 stops20h 46m

San José Juan Santamaria Intl

vie. 10/10

2:25 pm-10:31 am

2 stops21h 06m

$340

PortlandSan José

PDX - SJO

PDXSJO

Portland

mar. 9/23

7:04 am-7:37 pm

1 stop11h 33m

San José Juan Santamaria Intl

vie. 10/10

8:37 am-10:45 pm

1 stop15h 08m

$348

PortlandLiberia

PDX - LIR

PDXLIR

Portland

sáb. 10/4

11:55 pm-12:10 pm

1 stop11h 15m

Liberia

mié. 10/8

1:20 pm-10:27 pm

1 stop10h 07m

$353

PortlandSan José

PDX - SJO

PDXSJO

Portland

sáb. 11/1

5:10 pm-12:48 pm

2 stops18h 38m

San José Juan Santamaria Intl

lun. 11/17

7:00 am-10:20 pm

2 stops17h 20m

$370

PortlandSan José

PDX - SJO

PDXSJO

Portland

mar. 7/8

12:12 pm-11:11 am

2 stops21h 59m

San José Juan Santamaria Intl

lun. 7/14

12:16 pm-9:18 am

2 stops22h 02m

$390

PortlandSan José

PDX - SJO

PDXSJO

Portland

mar. 7/8

12:12 pm-11:11 am

2 stops21h 59m

San José Juan Santamaria Intl

lun. 7/14

2:48 pm-2:15 pm

3 stops24h 27m

$405

SpokaneLiberia

GEG - LIR

GEGLIR

Spokane

dom. 11/2

5:10 am-4:08 pm

1 stop8h 58m

Liberia

mar. 11/11

12:50 pm-8:45 pm

1 stop9h 55m

$405

SpokaneLiberia

GEG - LIR

GEGLIR

Spokane

sáb. 10/25

3:53 pm-1:02 pm

2 stops20h 09m

Liberia

mar. 11/4

3:00 pm-12:53 pm

2 stops23h 53m

$409

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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, September is the cheapest month in which you can book a flight from State of Washington to Costa Rica (average of $398). Flying from State of Washington 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 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 junio 12, 2025.

When flying from State of Washington to Costa Rica, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 junio 12, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Washington to Costa Rica. 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 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.

  • 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 $164 while deals on Spirit Airlines start at $175 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, September is the cheapest month in which you can book a flight from State of Washington to Costa Rica (average of $398). Flying from State of Washington 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 Washington 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 Washington to Costa Rica

Discover the top 9 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$152Average$192FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$308Average$394FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$386Average$689FlexibilityNo cancel feeOn-time71%
DeltaCheapest$390Average$657FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$428Average$628FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$462Average$654FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$481Average$797FlexibilityNo cancel feeOn-time69%
Copa AirlinesCheapest$634Average$805FlexibilityNo cancel feeOn-time70%
AeromexicoCheapest$734Average$953FlexibilityNo cancel feeOn-timeN/A

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