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Cheap flights from Seattle to Costa Rica from $214

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Costa Rica departing on 8/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Costa Rica

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
5:00 am - 7:53 pm
SEA
-
SJO
13h 53m
2 stops
American Airlines Logo
2:56 pm - 9:25 am
SJO
-
SEA
19h 29m
2 stops
$475American Airlines
Wed, Aug 19 - Wed, Sep 2
Southwest Logo
8:00 pm - 6:00 am
SEA
-
SJO
9h 00m
1 stop
Southwest Logo
12:55 pm - 1:35 am
SJO
-
SEA
13h 40m
2 stops
$476Southwest
Mon, Oct 5 - Mon, Oct 19
American Airlines Logo
3:51 pm - 2:10 pm
SEA
-
SJO
20h 19m
1 stop
American Airlines Logo
2:39 pm - 9:45 am
SJO
-
SEA
21h 06m
1 stop
$481American Airlines
Mon, Nov 9 - Mon, Nov 16
American Airlines Logo
5:00 am - 7:53 pm
SEA
-
SJO
13h 53m
2 stops
American Airlines Logo
1:03 pm - 9:25 am
SJO
-
SEA
21h 22m
1 stop
$486American Airlines
Wed, Aug 19 - Wed, Sep 2
Southwest Logo
8:00 pm - 6:00 am
SEA
-
SJO
9h 00m
1 stop
Southwest Logo
12:35 pm - 10:45 pm
SJO
-
SEA
11h 10m
1 stop
$494Southwest
Thu, Oct 22 - Tue, Oct 27
American Airlines Logo
8:21 pm - 7:53 pm
SEA
-
SJO
22h 32m
1 stop
American Airlines Logo
1:07 pm - 9:25 am
SJO
-
SEA
21h 18m
1 stop
$495American Airlines
Fri, Aug 28 - Fri, Sep 4
Southwest Logo
5:00 pm - 6:00 am
SEA
-
SJO
12h 00m
2 stops
Southwest Logo
12:35 pm - 10:45 pm
SJO
-
SEA
11h 10m
1 stop
$498Southwest
Thu, Oct 22 - Tue, Oct 27
Air Canada Logo
8:00 am - 11:50 am
SEA
-
LIR
26h 50m
1 stop
Air Canada Logo
1:40 pm - 7:22 pm
LIR
-
SEA
30h 42m
2 stops
$533Air Canada
Fri, Oct 23 - Sat, Oct 31
Air Canada Logo
8:00 am - 11:50 am
SEA
-
LIR
26h 50m
1 stop
Air Canada Logo
1:55 pm - 2:37 pm
LIR
-
SEA
25h 42m
2 stops
$538Air Canada
Fri, Oct 23 - Fri, Oct 30
Air Canada Logo
10:30 am - 11:50 am
SEA
-
LIR
24h 20m
2 stops
Air Canada Logo
1:40 pm - 3:37 pm
LIR
-
SEA
26h 57m
2 stops
$595Air Canada
Fri, Oct 23 - Sat, Oct 31

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United Airlines flights from Seattle to Costa Rica

Our best United Airlines deals on Seattle to Costa Rica flight tickets
United Airlines
Sep 11
SEA7:00 amSeattle/Tacoma Intl
11h 37m
1 stop
SJO7:37 pmSan José Juan Santamaria Intl
Sep 18
SJO8:45 amSan José Juan Santamaria Intl
12h 58m
1 stop
SEA8:43 pmSeattle/Tacoma Intl
$558
United Airlines
Jun 25
SEA11:55 amSeattle/Tacoma Intl
9h 44m
1 stop
SJO10:39 pmSan José Juan Santamaria Intl
Jun 29
SJO12:30 amSan José Juan Santamaria Intl
13h 51m
2 stops
SEA1:21 pmSeattle/Tacoma Intl
$563
United Airlines
Jun 20
SEA11:49 pmSeattle/Tacoma Intl
9h 22m
1 stop
SJO10:11 amSan José Juan Santamaria Intl
Jun 26
SJO8:45 amSan José Juan Santamaria Intl
11h 18m
1 stop
SEA7:03 pmSeattle/Tacoma Intl
$576

American Airlines flights from Seattle to Costa Rica

Our best American Airlines deals on Seattle to Costa Rica flight tickets
American Airlines
Sep 11
SEA5:30 amSeattle/Tacoma Intl
13h 37m
2 stops
SJO8:07 pmSan José Juan Santamaria Intl
Sep 18
SJO6:00 amSan José Juan Santamaria Intl
16h 05m
2 stops
SEA9:05 pmSeattle/Tacoma Intl
$475
American Airlines
Aug 19
SEA5:00 amSeattle/Tacoma Intl
13h 53m
2 stops
SJO7:53 pmSan José Juan Santamaria Intl
Sep 2
SJO1:03 pmSan José Juan Santamaria Intl
21h 22m
1 stop
SEA9:25 amSeattle/Tacoma Intl
$486
American Airlines
Aug 28
SEA8:21 pmSeattle/Tacoma Intl
22h 32m
1 stop
SJO7:53 pmSan José Juan Santamaria Intl
Sep 4
SJO1:07 pmSan José Juan Santamaria Intl
21h 18m
1 stop
SEA9:25 amSeattle/Tacoma Intl
$495

momondo 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, momondo users made 832,500 searches. Data last updated June 15, 2026.
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 - SJO

SEASJO

Seattle/Tacoma Intl

Wed 8/19

5:00 am-7:53 pm

2 stops13h 53m

San José Juan Santamaria Intl

Wed 9/2

2:56 pm-9:25 am

2 stops19h 29m

$475

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 10/5

8:00 pm-6:00 am

1 stop9h 00m

San José Juan Santamaria Intl

Mon 10/19

12:55 pm-1:35 am

2 stops13h 40m

$476

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 11/9

3:51 pm-2:10 pm

1 stop20h 19m

San José Juan Santamaria Intl

Mon 11/16

2:39 pm-9:45 am

1 stop21h 06m

$481

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Wed 8/19

5:00 am-7:53 pm

2 stops13h 53m

San José Juan Santamaria Intl

Wed 9/2

1:03 pm-9:25 am

1 stop21h 22m

$486
Quickest round-trip

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 10/22

8:00 pm-6:00 am

1 stop9h 00m

San José Juan Santamaria Intl

Tue 10/27

12:35 pm-10:45 pm

1 stop11h 10m

$494

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Fri 8/28

8:21 pm-7:53 pm

1 stop22h 32m

San José Juan Santamaria Intl

Fri 9/4

1:07 pm-9:25 am

1 stop21h 18m

$495

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 10/22

5:00 pm-6:00 am

2 stops12h 00m

San José Juan Santamaria Intl

Tue 10/27

12:35 pm-10:45 pm

1 stop11h 10m

$498

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Fri 10/23

8:00 am-11:50 am

1 stop26h 50m

Liberia

Sat 10/31

1:40 pm-7:22 pm

2 stops30h 42m

$533

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Fri 10/23

8:00 am-11:50 am

1 stop26h 50m

Liberia

Fri 10/30

1:55 pm-2:37 pm

2 stops25h 42m

$538

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Fri 10/23

10:30 am-11:50 am

2 stops24h 20m

Liberia

Sat 10/31

1:40 pm-3:37 pm

2 stops26h 57m

$595

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Costa Rica from

How to get the cheapest flight ticket from Seattle to Costa Rica

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Costa Rica?

The cheapest month to fly to Costa Rica from Seattle is in December. Flight prices, which tend to average around $166, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in December, then January is your next best option. Flight prices from Seattle to Costa Rica during January average around $194.

What is the cheapest Seattle/Tacoma Intl to Costa Rica flight route?

Fly from Seattle/Tacoma Intl to Liberia for the best Seattle/Tacoma Intl - Costa Rica flight prices

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

You are more likely to see cheaper flights to Costa Rica from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Costa Rica for around $648 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Costa Rica from Seattle for as low as $590 on momondo.

What cabin class options are available on Seattle to Costa Rica flights?

There are 2 cabin classes available to choose from on Seattle to Costa Rica flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seattle to Costa Rica flights?

No. A direct flight is the cheapest option for a flight between Seattle to Costa Rica.

Cheap Seattle to Costa Rica flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Costa Rica

Fastest flight time

6h 58m

Direct flights

Sun

Airports in Costa Rica

40 airports
The fastest flight from Seattle to Costa Rica takes 6h 58m
Direct flights go from Seattle to Costa Rica on Sunday. There are no airlines offering direct flights.
There are 40 airports in Costa Rica. From Seattle there are direct flights to Liberia (LIR).
Search flight deals

Frequently asked questions about flying from Seattle to Costa Rica

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Costa Rica?

    Prices for flights from Seattle/Tacoma Intl Airport to Costa Rica refresh daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Costa Rica?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Costa Rica?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Costa Rica.

  • What documentation or ID do you need to fly to Costa Rica?

    The necessary travel and health documents for your Costa Rica trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to Costa Rica?

Best airlines flying from Seattle to Costa Rica

Compare and see reviews for airlines that fly from Seattle to Costa Rica with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $304Free CancellationRating
7.1
11,661 reviews
Search American Airlines flights
DeltaPriceFrom $345Free CancellationRating
7.9
8,395 reviews
Search Delta flights
Alaska AirlinesPriceFrom $357Free CancellationRating
7.9
12,509 reviews
Search Alaska Airlines flights
JetBluePriceFrom $362Free CancellationRating
7.1
2,984 reviews
Search JetBlue flights
United AirlinesPriceFrom $366Free CancellationRating
7.4
9,827 reviews
Search United Airlines flights
SouthwestPriceFrom $516Free CancellationRating
7.9
4,235 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Costa Rica?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Costa Rica for you.

Can I find flights from Seattle to Costa Rica with flexible booking policies on momondo?

All flight searches from Seattle to Costa Rica on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seattle to Costa Rica?

Once all potential Seattle to Costa Rica flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Costa Rica right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Costa Rica now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Costa Rica and let you know when they change.

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Find better results for your trip to Costa Rica

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