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Cheap flights from Seattle to Costa Rica from $152

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 10/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

American Airlines Logo
8:49 pm - 1:38 pmSEA-SJO
15h 49m1 stop
American Airlines Logo
1:00 pm - 11:41 pmSJO-SEA
11h 41m1 stop
$336American Airlines
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Mon, Oct 6 - Wed, Oct 15
American Airlines Logo
8:49 pm - 12:00 pmSEA-SJO
14h 11m1 stop
American Airlines Logo
1:00 pm - 11:35 pmSJO-SEA
11h 35m1 stop
$337American Airlines
Find Deal
Mon, Oct 6 - Tue, Oct 21
American Airlines Logo
10:01 pm - 1:38 pmSEA-SJO
14h 37m2 stops
American Airlines Logo
1:00 pm - 11:41 pmSJO-SEA
11h 41m1 stop
$340American Airlines
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Mon, Oct 6 - Wed, Oct 15
United Airlines Logo
7:37 pm - 7:15 amSEA-SJO
10h 38m1 stop
United Airlines Logo
7:55 am - 11:15 pmSJO-SEA
16h 20m1 stop
$346United Airlines
Find Deal
Tue, Sep 30 - Tue, Oct 7
United Airlines Logo
5:31 pm - 7:15 amSEA-SJO
12h 44m1 stop
United Airlines Logo
7:55 am - 9:15 pmSJO-SEA
14h 20m2 stops
$350United Airlines
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Tue, Sep 30 - Tue, Oct 7
Alaska Airlines Logo
11:23 am - 11:51 pmSEA-SJO
11h 28m1 stop
Alaska Airlines Logo
1:55 am - 11:06 amSJO-SEA
11h 11m1 stop
$358Alaska Airlines
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Wed, Oct 29 - Sun, Nov 9
Delta Logo
3:40 pm - 1:06 pmSEA-SJO
19h 26m1 stop
Delta Logo
2:31 pm - 10:15 amSJO-SEA
21h 44m1 stop
$361Delta
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Mon, Nov 10 - Tue, Nov 18
Alaska Airlines Logo
8:00 am - 11:51 pmSEA-SJO
14h 51m2 stops
Alaska Airlines Logo
1:55 am - 2:46 pmSJO-SEA
14h 51m2 stops
$362Alaska Airlines
Find Deal
Wed, Oct 29 - Mon, Nov 10
Delta Logo
3:45 pm - 11:40 amSEA-LIR
18h 55m1 stop
Delta Logo
1:05 pm - 11:54 pmLIR-SEA
11h 49m1 stop
$373Delta
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Mon, Oct 27 - Fri, Oct 31
Southwest Logo
5:55 pm - 1:45 pmSEA-SJO
17h 50m2 stops
Southwest Logo
9:00 am - 10:55 pmSJO-SEA
15h 55m2 stops
$391Southwest
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Fri, Nov 14 - Tue, Nov 18

American Airlines flights from Seattle to Costa Rica

Our best American Airlines deals on Seattle to Costa Rica flight tickets
American Airlines
Oct 6
SEA8:49 pmSeattle/Tacoma Intl
15h 49m
1 stop
SJO1:38 pmSan José Juan Santamaria Intl
Oct 15
SJO1:00 pmSan José Juan Santamaria Intl
11h 41m
1 stop
SEA11:41 pmSeattle/Tacoma Intl
$336
Find similar
American Airlines
Oct 6
SEA8:49 pmSeattle/Tacoma Intl
14h 11m
1 stop
SJO12:00 pmSan José Juan Santamaria Intl
Oct 21
SJO1:00 pmSan José Juan Santamaria Intl
11h 35m
1 stop
SEA11:35 pmSeattle/Tacoma Intl
$337
Find similar
American Airlines
Oct 6
SEA10:01 pmSeattle/Tacoma Intl
14h 37m
2 stops
SJO1:38 pmSan José Juan Santamaria Intl
Oct 15
SJO1:00 pmSan José Juan Santamaria Intl
11h 41m
1 stop
SEA11:41 pmSeattle/Tacoma Intl
$340
Find similar

United Airlines flights from Seattle to Costa Rica

Our best United Airlines deals on Seattle to Costa Rica flight tickets
United Airlines
Sep 30
SEA7:37 pmSeattle/Tacoma Intl
10h 38m
1 stop
SJO7:15 amSan José Juan Santamaria Intl
Oct 7
SJO7:55 amSan José Juan Santamaria Intl
16h 20m
1 stop
SEA11:15 pmSeattle/Tacoma Intl
$346
Find similar
United Airlines
Sep 30
SEA5:31 pmSeattle/Tacoma Intl
12h 44m
1 stop
SJO7:15 amSan José Juan Santamaria Intl
Oct 7
SJO7:55 amSan José Juan Santamaria Intl
14h 20m
2 stops
SEA9:15 pmSeattle/Tacoma Intl
$350
Find similar
United Airlines
Oct 29
SEA7:13 pmSeattle/Tacoma Intl
15h 57m
2 stops
LIR12:10 pmLiberia
Nov 3
LIR12:50 pmLiberia
10h 23m
1 stop
SEA9:13 pmSeattle/Tacoma Intl
$365
Find similar

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 September 16, 2025.
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

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 10/6

8:49 pm-1:38 pm

1 stop15h 49m

San José Juan Santamaria Intl

Wed 10/15

1:00 pm-11:41 pm

1 stop11h 41m

$336

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 10/6

8:49 pm-12:00 pm

1 stop14h 11m

San José Juan Santamaria Intl

Tue 10/21

1:00 pm-11:35 pm

1 stop11h 35m

$337

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 10/6

10:01 pm-1:38 pm

2 stops14h 37m

San José Juan Santamaria Intl

Wed 10/15

1:00 pm-11:41 pm

1 stop11h 41m

$340

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 9/30

7:37 pm-7:15 am

1 stop10h 38m

San José Juan Santamaria Intl

Tue 10/7

7:55 am-11:15 pm

1 stop16h 20m

$346

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 9/30

5:31 pm-7:15 am

1 stop12h 44m

San José Juan Santamaria Intl

Tue 10/7

7:55 am-9:15 pm

2 stops14h 20m

$350

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Wed 10/29

11:23 am-11:51 pm

1 stop11h 28m

San José Juan Santamaria Intl

Sun 11/9

1:55 am-11:06 am

1 stop11h 11m

$358

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 11/10

3:40 pm-1:06 pm

1 stop19h 26m

San José Juan Santamaria Intl

Tue 11/18

2:31 pm-10:15 am

1 stop21h 44m

$361

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Wed 10/29

8:00 am-11:51 pm

2 stops14h 51m

San José Juan Santamaria Intl

Mon 11/10

1:55 am-2:46 pm

2 stops14h 51m

$362

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Mon 10/27

3:45 pm-11:40 am

1 stop18h 55m

Liberia

Fri 10/31

1:05 pm-11:54 pm

1 stop11h 49m

$373

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Fri 11/14

5:55 pm-1:45 pm

2 stops17h 50m

San José Juan Santamaria Intl

Tue 11/18

9:00 am-10:55 pm

2 stops15h 55m

$391

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 September. Flight prices, which tend to average around $514, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in September, then October is your next best option. Flight prices from Seattle to Costa Rica during October average around $531.

What is the cheapest day to depart on your flight to Costa Rica?

According to our data, Tuesday is the cheapest day to fly to Costa Rica from Seattle. The lowest ticket price found for a Tuesday departure recently was $576. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $782. These prices are subject to change though, so be sure to set up a Price Alert for flights to Costa Rica.

What is the cheapest time of day to depart on your flight to Costa Rica?

At noon is the cheapest time of day to fly from Seattle to Costa Rica when you can find flight prices for as low as $658. Flying to Costa Rica at noon is an ideal time because this is during off-peak travel hours. Flights to Costa Rica are more costly in the morning, with an average ticket price of $693. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 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 $643 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 $577 on momondo.

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

There are 2 cabin classes available to choose from on Seattle/Tacoma Intl 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?

You could potentially save up to 26% on your flight if you consider stops on a Seattle to Costa Rica flight.

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 56m

Direct flights

Sun

Airports in Costa Rica

1 airport
The fastest flight from Seattle to Costa Rica takes 6h 56m
Direct flights go from Seattle to Costa Rica on Sunday. There are no airlines offering direct flights.
There is 1 airport near Costa Rica: Liberia (LIR)
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  • 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
AviancaPriceFrom $152Free CancellationRating
6.7
2,435 reviews
Search Avianca flights
Spirit AirlinesPriceFrom $308Free CancellationRating
6.3
8,019 reviews
Search Spirit Airlines flights
Copa AirlinesPriceFrom $423Free CancellationRating
7.6
1,531 reviews
Search Copa Airlines flights
Alaska AirlinesPriceFrom $431Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $448Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $464Free CancellationRating
7.9
7,957 reviews
Search Delta flights
United AirlinesPriceFrom $489Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
SouthwestPriceFrom $543Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
AeromexicoPriceFrom $709Free CancellationRating
7.4
1,696 reviews
Search Aeromexico 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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