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$146+ 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 2/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap 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 January 29, 2026.

This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/37:15 am
SEA
-
SJO
1 stop10h 57m
American Airlines
Wed 3/112:20 pm
SJO
-
SEA
1 stop11h 35m
American Airlines
Deal found 1/27$355
This Trip.com deal was found by Cheapflights users on 1/27. 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.
Mon 2/239:14 pm
SEA
-
SJO
2 stops24h 01m
Multiple Airlines
Mon 3/95:30 am
SJO
-
SEA
2 stops36h 39m
Multiple Airlines
Deal found 1/27$360
This Avianca deal was found by Cheapflights users on 1/28. 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.
Tue 4/216:25 am
SEA
-
SJO
2 stops15h 50m
Multiple Airlines
Tue 4/285:45 am
SJO
-
SEA
2 stops15h 08m
Multiple Airlines
Deal found 1/28$362
This American Airlines deal was found by Cheapflights users on 1/28. 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.
Sat 2/2812:07 am
SEA
-
SJO
1 stop19h 00m
American Airlines
Fri 3/136:00 am
SJO
-
SEA
1 stop19h 24m
American Airlines
Deal found 1/28$366
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/135:00 pm
SEA
-
SJO
1 stop19h 22m
American Airlines
Tue 4/216:30 am
SJO
-
SEA
2 stops16h 56m
American Airlines
Deal found 1/27$371
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1111:55 pm
SEA
-
SJO
1 stop20h 41m
American Airlines
Thu 4/1611:35 pm
SJO
-
SEA
1 stop12h 16m
American Airlines
Deal found 1/27$376
This Avianca deal was found by Cheapflights users on 1/28. 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.
Tue 8/117:55 am
SEA
-
SJO
2 stops14h 20m
Multiple Airlines
Sat 8/225:45 am
SJO
-
SEA
2 stops13h 12m
Multiple Airlines
Deal found 1/28$378
This Avianca deal was found by Cheapflights users on 1/28. 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.
Tue 8/119:14 am
SEA
-
SJO
2 stops13h 01m
Multiple Airlines
Wed 8/195:45 am
SJO
-
SEA
2 stops13h 12m
Multiple Airlines
Deal found 1/28$381
This Trip.com deal was found by Cheapflights users on 1/28. 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.
Mon 4/209:15 pm
SEA
-
SJO
2 stops25h 00m
Multiple Airlines
Tue 5/125:45 am
SJO
-
SEA
2 stops15h 08m
Multiple Airlines
Deal found 1/28$388
This Avianca deal was found by Cheapflights users on 1/28. 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.
Sun 5/107:15 pm
SEA
-
SJO
2 stops12h 30m
Multiple Airlines
Tue 5/195:45 am
SJO
-
SEA
2 stops14h 11m
Multiple Airlines
Deal found 1/28$389
This Expedia deal was found by Cheapflights users on 1/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/135:55 pm
SEA
-
SJO
2 stops16h 35m
Multiple Airlines
Thu 9/243:10 pm
SJO
-
SEA
2 stops20h 42m
Multiple Airlines
Deal found 1/27$393
This Avianca deal was found by Cheapflights users on 1/27. 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.
Tue 3/36:10 am
SEA
-
SJO
2 stops15h 05m
Multiple Airlines
Wed 3/116:00 am
SJO
-
SEA
2 stops13h 57m
Multiple Airlines
Deal found 1/27$395

Find 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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$355
(American Airlines)

One-way from

$146
(Kiwi.com)

Popular in

April

Cheapest in

October

Average price

$568
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. 7% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 29, 2026.
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

Sun 5/10

7:15 pm-8:45 am

2 stops12h 30m

San José Juan Santamaria Intl

Tue 5/19

5:45 am-6:56 pm

2 stops14h 11m

$389

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 4/21

7:10 am-11:53 pm

2 stops15h 43m

San José Juan Santamaria Intl

Tue 5/12

12:53 am-6:54 pm

2 stops19h 01m

$401

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 2/28

12:07 am-9:07 pm

1 stop19h 00m

San José Juan Santamaria Intl

Fri 3/6

7:00 am-12:24 am

1 stop19h 24m

$407

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 4/21

11:25 am-11:53 pm

1 stop11h 28m

San José Juan Santamaria Intl

Fri 5/8

12:55 am-6:40 pm

1 stop18h 45m

$448

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 4/20

7:10 am-11:53 pm

2 stops15h 43m

San José Juan Santamaria Intl

Sat 5/9

12:55 am-8:50 pm

1 stop20h 55m

$453

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Wed 5/6

2:53 pm-6:20 am

2 stops14h 27m

Liberia

Thu 5/14

11:20 am-11:42 pm

1 stop13h 22m

$459

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Sat 2/21

11:32 am-5:58 pm

1 stop28h 26m

Liberia

Fri 2/27

7:08 pm-12:36 pm

1 stop19h 28m

$460

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Sat 3/7

6:21 pm-4:58 pm

2 stops20h 37m

Liberia

Sun 3/15

6:08 pm-9:31 am

1 stop16h 23m

$470

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 4/21

11:25 am-11:53 pm

1 stop11h 28m

San José Juan Santamaria Intl

Mon 4/27

12:55 am-5:38 pm

1 stop17h 43m

$476

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Mon 2/23

3:55 pm-6:45 am

2 stops12h 50m

Liberia

Mon 3/2

7:08 pm-8:47 pm

2 stops27h 39m

$502

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 39 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, 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 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 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 January 29, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Costa Rica as you normally would.

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 January 29, 2026.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and United 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.
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
8.0
Very good
11,808 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,125 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
United Airlines
7.4
Good
9,215 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
American Airlines
7.2
Good
11,206 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Avianca
6.6
Okay
2,492 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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 Alaska Airlines and American Airlines fly from Seattle to Costa Rica in about 15h 43m. The time it takes to get you to your destination can typically vary by up to 3h 17m. 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 $161 and $185 on Alaska Airlines and American 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 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

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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 7 airlines flying from Seattle to Costa Rica

Discover the top 7 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$152Average$192FlexibilityNo cancel feeOn-time71%
DeltaCheapest$280Average$653FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$346Average$602FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$357Average$633FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$390Average$615FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$572Average$723FlexibilityNo cancel feeOn-time63%
AeromexicoCheapest$809Average$981FlexibilityNo cancel feeOn-timeN/A

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