HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Costa Rica

$151+ 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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
nov. 27 — dic. 41
jue. 11/27
jue. 12/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Costa Rica with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 octubre 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
mar. 11/411:23 amSEA - SJO
1 stop11h 15mMultiple Airlines
lun. 11/172:20 amSJO - SEA
2 stops35h 47mMultiple Airlines
Deal found 10/26$387
This Trip.com deal was found by Cheapflights users on 10/27. 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.
mar. 12/98:40 amSEA - SJO
1 stop17h 10mMultiple Airlines
mar. 12/165:10 pmSJO - SEA
1 stop19h 25mMultiple Airlines
Deal found 10/27$389
This Avianca deal was found by Cheapflights users on 10/27. 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.
lun. 11/38:44 amSEA - SJO
2 stops21h 01mMultiple Airlines
jue. 11/66:00 amSJO - SEA
2 stops14h 57mMultiple Airlines
Deal found 10/27$408
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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.
mar. 12/97:05 amSEA - SJO
1 stop14h 43mAlaska Airlines
dom. 12/141:30 amSJO - SEA
1 stop17h 58mAlaska Airlines
Deal found 10/27$412
This United Airlines deal was found by Cheapflights users on 10/27. 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.
jue. 11/1311:59 pmSEA - SJO
1 stop11h 16mUnited Airlines
lun. 11/179:40 amSJO - SEA
1 stop10h 45mUnited Airlines
Deal found 10/27$413
This United Airlines deal was found by Cheapflights users on 10/27. 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. 11/157:00 amSEA - SJO
2 stops13h 00mUnited Airlines
sáb. 11/2212:35 pmSJO - SEA
2 stops12h 35mUnited Airlines
Deal found 10/27$417
This Trip.com deal was found by Cheapflights users on 10/27. 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.
mar. 12/28:40 amSEA - SJO
1 stop17h 10mMultiple Airlines
mié. 12/107:45 amSJO - SEA
1 stop16h 45mMultiple Airlines
Deal found 10/27$420
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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. 12/89:14 pmSEA - SJO
1 stop24h 34mAlaska Airlines
dom. 12/141:30 amSJO - SEA
2 stops22h 19mAlaska Airlines
Deal found 10/27$424
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
jue. 11/1310:20 amSEA - SJO
1 stop12h 18mMultiple Airlines
lun. 11/178:47 amSJO - SEA
2 stops29h 20mMultiple Airlines
Deal found 10/27$426
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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.
mar. 12/96:00 pmSEA - LIR
2 stops22h 07mAlaska Airlines
mar. 12/169:00 amLIR - SEA
2 stops25h 33mAlaska Airlines
Deal found 10/27$431
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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.
mié. 12/311:26 amSEA - LIR
2 stops16h 54mAlaska Airlines
mié. 12/107:17 pmLIR - SEA
2 stops25h 38mAlaska Airlines
Deal found 10/27$436
This Alaska Airlines deal was found by Cheapflights users on 10/26. 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.
mar. 12/95:00 pmSEA - LIR
2 stops23h 07mAlaska Airlines
sáb. 12/137:17 pmLIR - SEA
2 stops21h 22mAlaska Airlines
Deal found 10/26$445

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 octubre 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$373
(Avianca)

One-way from

$151
(eDestinos)

Popular in

December

Cheapest in

September

Average price

$512

Good round-trip deal

$1,397 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 Seattle/Tacoma Intl to Costa Rica
Search Deals
One-way flight from Seattle/Tacoma Intl to Costa Rica
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($76 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Costa Rica.
Search Deals

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 octubre 28, 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

lun. 12/8

6:00 am-10:20 pm

1 stop14h 20m

San José Juan Santamaria Intl

jue. 12/18

2:31 pm-11:58 pm

1 stop11h 27m

$412

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

mié. 12/3

11:26 am-6:20 am

2 stops16h 54m

Liberia

mié. 12/10

7:17 pm-6:55 pm

2 stops25h 38m

$436

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

dom. 12/7

6:00 am-10:20 pm

1 stop14h 20m

San José Juan Santamaria Intl

mar. 12/16

2:31 pm-11:58 pm

1 stop11h 27m

$448

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

jue. 11/13

10:20 am-12:38 am

1 stop12h 18m

San José Juan Santamaria Intl

dom. 11/16

1:55 am-7:58 pm

1 stop20h 03m

$456

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

sáb. 12/13

12:45 pm-6:20 am

2 stops15h 35m

Liberia

mié. 12/24

7:40 am-7:20 am

2 stops25h 40m

$472

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

sáb. 12/6

7:06 am-11:48 pm

2 stops14h 42m

San José Juan Santamaria Intl

lun. 12/15

1:30 am-6:55 pm

2 stops19h 25m

$476

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

lun. 2/23

11:55 am-6:45 am

1 stop16h 50m

Liberia

jue. 2/26

7:45 pm-11:38 am

2 stops17h 53m

$477

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

mié. 12/3

3:47 pm-1:06 pm

1 stop19h 19m

San José Juan Santamaria Intl

mié. 12/10

2:31 pm-11:58 pm

1 stop11h 27m

$479

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

lun. 1/12

12:50 pm-6:39 am

2 stops15h 49m

Liberia

sáb. 1/17

6:11 pm-9:18 am

1 stop17h 07m

$481

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

sáb. 12/13

5:59 pm-6:20 am

1 stop10h 21m

Liberia

jue. 12/25

7:40 am-7:19 am

2 stops25h 39m

$483

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 35 results
1
2
3
4

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, May is the cheapest month in which you can book a flight from Seattle to Costa Rica (average of $190). Flying from Seattle to Costa Rica in April 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 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 octubre 28, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 53% on flights from Seattle to Costa Rica by exploring options for tickets at noon.

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 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.

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 octubre 28, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta 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
11,203 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,203 reviews
Alaska Airlines
8.0
Very good
11,203 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Southwest
8.0
Very good
4,240 reviews
Alaska Airlines
8.0
Very good
11,203 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
7.9
Good
7,994 reviews
Alaska Airlines
8.0
Very good
11,203 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
9,001 reviews
Alaska Airlines
8.0
Very good
11,203 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
American Airlines
7.2
Good
11,032 reviews
Alaska Airlines
8.0
Very good
11,203 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

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 Delta and Alaska Airlines fly from Seattle to Costa Rica in about 14h 20m. The time it takes to get you to your destination can typically vary by up to 2h 34m. 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 Southwest. According to our data, you can fly for as low as $173. Users have also found prices from $196 and $198 on American Airlines and Alaska 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, May is the cheapest month in which you can book a flight from Seattle to Costa Rica (average of $190). Flying from Seattle to Costa Rica in April 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Costa Rica

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to San José flights
Seattle to Liberia flights
Seattle to Panama City flights
Seattle to Philip S.W.Goldson flights
Seattle to San Salvador flights
Seattle to Guatemala City flights
Portland to San José flights
Portland to Liberia flights
Portland to Philip S.W.Goldson flights
Portland to Guatemala City flights
Seattle to Managua flights
Seattle to Coxen Hole flights
Seattle to San Pedro Sula flights
Portland to Panama City flights
Portland to San Salvador flights
Spokane to San José flights
Spokane to Philip S.W.Goldson flights
Portland to Coxen Hole flights
Spokane to Liberia flights
Pasco to San Salvador flights
Portland to Managua flights
Spokane to Panama City flights
Spokane to Coxen Hole flights
Seattle to David flights
Pasco to San José flights
Spokane to Guatemala City flights
Portland to San Pedro Sula flights
Pasco to Philip S.W.Goldson flights
Spokane to Managua flights
Pasco to Managua flights
Pullman to San José flights
Pullman to Panama City flights
Seattle to Tegucigalpa flights
Bellingham to San José flights
Pasco to Tegucigalpa flights
Portland to Flores flights
Wenatchee to Philip S.W.Goldson flights

Top 8 airlines flying from Seattle to Costa Rica

Discover the top 8 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 octubre 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$152Average$217FlexibilityNo cancel feeOn-time71%
DeltaCheapest$280Average$708FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$373Average$621FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$405Average$638FlexibilityNo cancel feeOn-time75%
Copa AirlinesCheapest$423Average$785FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$434Average$669FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$568Average$678FlexibilityNo cancel feeOn-time63%
AeromexicoCheapest$782Average$981FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.