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Cheap flights from Seattle to Costa Rica from $171

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 1/5. 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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Find the cheapest flights from Seattle to Costa Rica

Cheap round-trip flights

Logo
9:05 am - 7:40 amSEA-SJO
21h 35m2 stops
Logo
4:20 pm - 11:43 amSJO-SEA
20h 23m2 stops
$384
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Mon, Sep 1 - Mon, Sep 8
Alaska Airlines Logo
9:35 am - 12:38 amSEA-SJO
13h 03m2 stops
Alaska Airlines Logo
1:30 am - 10:41 pmSJO-SEA
23h 11m1 stop
$390Alaska Airlines
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Tue, Nov 11 - Mon, Nov 24
American Airlines Logo
5:43 pm - 1:01 pmSEA-LIR
18h 18m1 stop
American Airlines Logo
12:49 pm - 11:59 pmLIR-SEA
12h 10m1 stop
$393American Airlines
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Wed, Sep 24 - Tue, Sep 30
Delta Logo
3:45 pm - 12:50 pmSEA-SJO
20h 05m1 stop
Delta Logo
7:00 am - 8:49 pmSJO-SEA
15h 49m1 stop
$394Delta
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Sat, Nov 1 - Wed, Nov 19
American Airlines Logo
5:43 pm - 1:01 pmSEA-LIR
18h 18m1 stop
American Airlines Logo
12:49 pm - 9:19 amLIR-SEA
21h 30m2 stops
$397American Airlines
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Wed, Sep 24 - Tue, Sep 30
United Airlines Logo
7:28 pm - 10:25 amSEA-SJO
13h 57m2 stops
United Airlines Logo
9:40 am - 6:25 pmSJO-SEA
10h 45m1 stop
$428United Airlines
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Sun, Oct 26 - Sun, Nov 2
United Airlines Logo
11:58 pm - 12:10 pmSEA-LIR
11h 12m1 stop
United Airlines Logo
1:20 pm - 10:52 pmLIR-SEA
10h 32m1 stop
$445United Airlines
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Tue, Sep 9 - Fri, Sep 12
Southwest Logo
11:10 pm - 12:45 pmSEA-SJO
12h 35m2 stops
Southwest Logo
1:15 pm - 11:30 pmSJO-SEA
11h 15m1 stop
$463Southwest
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Mon, Aug 25 - Sat, Aug 30
Southwest Logo
10:45 pm - 1:15 pmSEA-LIR
13h 30m1 stop
Southwest Logo
2:10 pm - 11:30 pmLIR-SEA
10h 20m1 stop
$501Southwest
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Sat, Sep 6 - Sat, Sep 13
Delta Logo
9:45 pm - 12:00 pmSEA-LIR
13h 15m1 stop
Delta Logo
1:25 pm - 11:54 pmLIR-SEA
11h 29m1 stop
$503Delta
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Wed, Sep 24 - Wed, Oct 1

American Airlines flights from Seattle to Costa Rica

Our best American Airlines deals on Seattle to Costa Rica flight tickets
American Airlines
Sep 24
SEA5:43 pmSeattle/Tacoma Intl
18h 18m
1 stop
LIR1:01 pmLiberia
Sep 30
LIR12:49 pmLiberia
12h 10m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
$393
Find similar
American Airlines
Aug 21
SEA6:30 amSeattle/Tacoma Intl
12h 45m
2 stops
SJO8:15 pmSan José Juan Santamaria Intl
Sep 3
SJO6:00 amSan José Juan Santamaria Intl
18h 59m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
$397
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American Airlines
Sep 5
SEA5:26 amSeattle/Tacoma Intl
13h 16m
2 stops
SJO7:42 pmSan José Juan Santamaria Intl
Sep 9
SJO6:00 amSan José Juan Santamaria Intl
16h 23m
2 stops
SEA9:23 pmSeattle/Tacoma Intl
$398
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Alaska Airlines flights from Seattle to Costa Rica

Our best Alaska Airlines deals on Seattle to Costa Rica flight tickets
Alaska Airlines
Nov 11
SEA9:35 amSeattle/Tacoma Intl
13h 03m
2 stops
SJO12:38 amSan José Juan Santamaria Intl
Nov 24
SJO1:30 amSan José Juan Santamaria Intl
23h 11m
1 stop
SEA10:41 pmSeattle/Tacoma Intl
$390
Find similar
Alaska Airlines
Nov 4
SEA8:05 amSeattle/Tacoma Intl
14h 33m
1 stop
SJO12:38 amSan José Juan Santamaria Intl
Nov 18
SJO1:58 amSan José Juan Santamaria Intl
17h 05m
2 stops
SEA5:03 pmSeattle/Tacoma Intl
$392
Find similar
Alaska Airlines
Nov 1
SEA9:15 pmSeattle/Tacoma Intl
26h 23m
1 stop
SJO12:38 amSan José Juan Santamaria Intl
Nov 18
SJO1:58 amSan José Juan Santamaria Intl
14h 14m
2 stops
SEA2:12 pmSeattle/Tacoma Intl
$400
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 July 31, 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 9/1

9:05 am-7:40 am

2 stops21h 35m

San José Juan Santamaria Intl

Mon 9/8

4:20 pm-11:43 am

2 stops20h 23m

$384

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 11/11

9:35 am-12:38 am

2 stops13h 03m

San José Juan Santamaria Intl

Mon 11/24

1:30 am-10:41 pm

1 stop23h 11m

$390

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Wed 9/24

5:43 pm-1:01 pm

1 stop18h 18m

Liberia

Tue 9/30

12:49 pm-11:59 pm

1 stop12h 10m

$393

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 11/1

3:45 pm-12:50 pm

1 stop20h 05m

San José Juan Santamaria Intl

Wed 11/19

7:00 am-8:49 pm

1 stop15h 49m

$394

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Wed 9/24

5:43 pm-1:01 pm

1 stop18h 18m

Liberia

Tue 9/30

12:49 pm-9:19 am

2 stops21h 30m

$397

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 10/26

7:28 pm-10:25 am

2 stops13h 57m

San José Juan Santamaria Intl

Sun 11/2

9:40 am-6:25 pm

1 stop10h 45m

$428

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Tue 9/9

11:58 pm-12:10 pm

1 stop11h 12m

Liberia

Fri 9/12

1:20 pm-10:52 pm

1 stop10h 32m

$445

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 8/25

11:10 pm-12:45 pm

2 stops12h 35m

San José Juan Santamaria Intl

Sat 8/30

1:15 pm-11:30 pm

1 stop11h 15m

$463

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Sat 9/6

10:45 pm-1:15 pm

1 stop13h 30m

Liberia

Sat 9/13

2:10 pm-11:30 pm

1 stop10h 20m

$501

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Wed 9/24

9:45 pm-12:00 pm

1 stop13h 15m

Liberia

Wed 10/1

1:25 pm-11:54 pm

1 stop11h 29m

$503

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 May. Flight prices, which tend to average around $547, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in May, then September is your next best option. Flight prices from Seattle to Costa Rica during September average around $565.

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 $651 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 $562 on momondo.

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

There are 3 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 2% 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

Best Price Found

$171

Fastest flight time

6h 58m

Direct flights

Sun

Airports in Costa Rica

2 airports
The best one-way flight to Costa Rica from Seattle in the past 72 hours is $171. The best round-trip flight deal from Seattle to Costa Rica found on momondo in the last 72 hours is $384.
The fastest flight from Seattle to Costa Rica takes 6h 58m
Direct flights go from Seattle to Costa Rica on Sunday. The only airline offering direct flights is Alaska Airlines.
There are 2 airports near Costa Rica: Liberia (LIR), San José Juan Santamaria Intl (SJO)
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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
2,388 reviews
Search Avianca flights
Spirit AirlinesPriceFrom $308Free CancellationRating
6.3
8,049 reviews
Search Spirit Airlines flights
Copa AirlinesPriceFrom $423Free CancellationRating
7.5
1,493 reviews
Search Copa Airlines flights
Alaska AirlinesPriceFrom $443Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $451Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $486Free CancellationRating
8.0
7,981 reviews
Search Delta flights
United AirlinesPriceFrom $492Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
SouthwestPriceFrom $521Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
AeromexicoPriceFrom $734Free CancellationRating
7.5
1,721 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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