Costa Rica

$251+ Cheap flights from Seattle (SEA) to Costa Rica

SEA — SJO
Oct 24 — Oct 311
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Cheap flight deals from Seattle to Costa Rica

Cheapest flights from Seattle to Costa Rica

Wed 12/27:05 am -
1 stop23h 30m
Fri 12/114:15 pm -
1 stop20h 22m
Deal found 9/20$568
Wed 9/309:27 am -
2 stops22h 03m
Sun 10/44:35 pm -
2 stops19h 00m
Deal found 9/19$571
Fri 10/162:02 pm -
2 stops17h 28m
Thu 10/227:45 am -
1 stop15h 14m
Deal found 9/19$580
Sun 11/89:25 pm -
2 stops12h 55m
Tue 11/242:10 pm -
2 stops13h 35m
Deal found 9/21$589
Sat 9/2611:15 pm -
1 stop32h 15m
Sat 10/37:45 am -
1 stop15h 14m
Deal found 9/19$593
Fri 12/48:05 am -
2 stops22h 30m
Mon 12/147:00 am -
1 stop17h 20m
Deal found 9/19$594
Mon 10/266:15 am -
2 stops12h 25m
Mon 11/22:10 pm -
2 stops13h 05m
Deal found 9/21$598
Fri 10/3010:35 pm -
1 stop12h 25m
Fri 11/132:37 pm -
1 stop11h 20m
Deal found 9/22$600
Wed 10/219:28 am -
2 stops22h 02m
Sun 10/254:15 pm -
2 stops19h 20m
Deal found 9/19$603
Wed 10/215:41 pm -
1 stop19h 19m
Sun 10/256:00 am -
1 stop18h 59m
Deal found 9/19$605
Tue 10/2010:15 pm -
2 stops33h 15m
Fri 10/234:35 pm -
2 stops24h 45m
Deal found 9/23$606
Mon 10/263:31 pm -
2 stops14h 19m
Mon 11/27:40 am -
1 stop32h 00m
Deal found 9/21$624

Find flight deals from Seattle to Costa Rica

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$562
(Avianca)

One-way from

$251
(FlightHub)

Popular in

March

Cheapest in

January

Average price

$634

Good round-trip deal

$937 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-San José Juan Santamaria Intl flight deals.
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-San José Juan Santamaria Intl flights.
From Seattle/Tacoma Intl to Costa Rica
One-way flight from Seattle/Tacoma Intl to Costa Rica
Highest demand for flights based on searches. 9% potential increase in price ($70 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($11 potential savings vs. average RT price).
Average for round-trip flights in September 2026
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Costa Rica.

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Seattle to Costa Rica that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Sun 10/18

9:28 am-8:30 am

2 stops22h 02m

San José Juan Santamaria Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$276

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Tue 11/3

1:16 pm-8:32 am

1 stop17h 16m

San José Juan Santamaria Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$279

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Sat 12/5

6:00 am-10:17 pm

1 stop14h 17m

San José Juan Santamaria Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$279

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Sat 10/31

5:23 pm-7:32 am

1 stop13h 09m

San José Juan Santamaria Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$279

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Sun 1/10

1:16 pm-8:32 am

1 stop17h 16m

San José Juan Santamaria Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$279
Quickest round-trip

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Fri 10/2

7:25 pm-7:15 am

1 stop10h 50m

San José Juan Santamaria Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$289

SeattleLiberia

SEA Seattle/Tacoma Intl - LIR Liberia

SEALIR

Seattle/Tacoma Intl

Mon 11/23

2:30 pm-12:35 pm

3 stops20h 05m

Liberia

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$296

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Sat 10/31

8:20 am-8:31 pm

1 stop11h 11m

San José Juan Santamaria Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$299

SeattleLiberia

SEA Seattle/Tacoma Intl - LIR Liberia

SEALIR

Seattle/Tacoma Intl

Sun 12/13

3:15 pm-7:35 am

1 stop14h 20m

Liberia

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$310

SeattleSan José

SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl

SEASJO

Seattle/Tacoma Intl

Tue 11/3

5:47 pm-1:46 pm

1 stop17h 59m

San José Juan Santamaria Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$317

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/22

Showing 1-10 of 38 resultsSorted by cheapest first
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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

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, January is the cheapest month in which you can book a flight from Seattle to Costa Rica (average of $559). Flying from Seattle to Costa Rica in April is currently the most expensive (average of $819). 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.

How far ahead should I book a flight from Seattle to Costa Rica?

The best time to book flights from Seattle to Costa Rica is 74 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Costa Rica

Get a feel of what it's like to fly with Alaska Airlines,Delta, andUnited Airlines 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.

Food

7.0

Entertainment

7.0

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle

Food

7.0

Entertainment

7.0

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle

Food

7.0

Entertainment

7.0

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle

Food

7.0

Entertainment

7.0

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle

Food

7.0

Entertainment

7.0

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle

Food

7.0

Entertainment

7.0

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle

Related info for your journey

  • 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 United Airlines and Delta fly from Seattle to Costa Rica in about 15h 02m. The time it takes to get you to your destination can typically vary by up to 4h 03m. The distance from Seattle to Costa Rica is about 3405 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 $156. Users have also found prices from $172 and $177 on Alaska Airlines and Southwest, 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, January is the cheapest month in which you can book a flight from Seattle to Costa Rica (average of $559). Flying from Seattle to Costa Rica in April is currently the most expensive (average of $819). 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

Top 7 airlines flying from Seattle to Costa Rica

AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$316Average$708FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$357Average$713FlexibilityNo cancel feeOn-time75%
JetBlueCheapest$362Average$682FlexibilityNo cancel feeOn-time62%
Air CanadaCheapest$384Average$740FlexibilityNo cancel feeOn-time67%
DeltaCheapest$390Average$814FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$390Average$708FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$516Average$703FlexibilityNo cancel feeOn-time63%

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