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Cheap flights from Seattle to Costa Rica from $202

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 9/28. 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
5:34 pm - 1:47 pm
SEA
-
LIR
19h 13m
1 stop
American Airlines Logo
2:47 pm - 11:11 am
LIR
-
SEA
21h 24m
2 stops
$439American Airlines
Sat, Sep 12 - Fri, Sep 18
American Airlines Logo
10:45 pm - 1:18 pm
SEA
-
LIR
13h 33m
2 stops
American Airlines Logo
2:47 pm - 10:09 am
LIR
-
SEA
20h 22m
2 stops
$439American Airlines
Sat, Sep 12 - Fri, Sep 18
Southwest Logo
6:30 am - 7:40 pm
SEA
-
SJO
12h 10m
2 stops
Southwest Logo
1:30 pm - 10:00 am
SJO
-
SEA
21h 30m
2 stops
$506Southwest
Sun, Oct 25 - Fri, Oct 30
Southwest Logo
9:25 pm - 12:20 pm
SEA
-
SJO
12h 55m
2 stops
Southwest Logo
2:10 pm - 10:05 am
SJO
-
SEA
21h 55m
2 stops
$506Southwest
Mon, Nov 2 - Thu, Nov 12
Multiple Airlines Logo
11:18 pm - 9:35 am
SEA
-
SJO
33h 17m
1 stop
Multiple Airlines Logo
5:45 am - 8:05 pm
SJO
-
SEA
16h 20m
1 stop
$516Multiple Airlines
Thu, Oct 29 - Sat, Nov 7
Multiple Airlines Logo
7:12 pm - 11:40 pm
SEA
-
SJO
27h 28m
2 stops
Multiple Airlines Logo
5:45 am - 6:33 pm
SJO
-
SEA
13h 48m
2 stops
$526Multiple Airlines
Mon, Sep 7 - Thu, Sep 17
Delta Logo
9:20 pm - 2:20 pm
SEA
-
LIR
15h 00m
1 stop
Delta Logo
3:25 pm - 10:26 am
LIR
-
SEA
21h 01m
1 stop
$546Delta
Sun, Jan 24 - Thu, Feb 4
Delta Logo
6:00 pm - 1:30 pm
SEA
-
LIR
17h 30m
1 stop
Delta Logo
3:25 pm - 10:26 am
LIR
-
SEA
21h 01m
1 stop
$546Delta
Sun, Jan 24 - Fri, Feb 5
Alaska Airlines Logo
8:20 am - 7:30 pm
SEA
-
SJO
10h 10m
1 stop
Alaska Airlines Logo
1:43 am - 8:05 pm
SJO
-
SEA
20h 22m
1 stop
$549Alaska Airlines
Sun, Oct 4 - Sun, Nov 1
Alaska Airlines Logo
8:20 am - 7:30 pm
SEA
-
SJO
10h 10m
1 stop
Alaska Airlines Logo
1:43 am - 10:34 pm
SJO
-
SEA
22h 51m
2 stops
$553Alaska Airlines
Sun, Oct 4 - Sun, Nov 1

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Southwest flights from Seattle to Costa Rica

Our best Southwest deals on Seattle to Costa Rica flight tickets
Southwest
Oct 25
SEA6:30 amSeattle/Tacoma Intl
12h 10m
2 stops
SJO7:40 pmSan José Juan Santamaria Intl
Oct 30
SJO1:30 pmSan José Juan Santamaria Intl
21h 30m
2 stops
SEA10:00 amSeattle/Tacoma Intl
$506
Southwest
Sep 22
SEA6:40 amSeattle/Tacoma Intl
11h 05m
2 stops
SJO6:45 pmSan José Juan Santamaria Intl
Oct 22
SJO1:30 pmSan José Juan Santamaria Intl
12h 25m
2 stops
SEA12:55 amSeattle/Tacoma Intl
$515
Southwest
Sep 20
SEA11:00 pmSeattle/Tacoma Intl
12h 45m
2 stops
SJO12:45 pmSan José Juan Santamaria Intl
Sep 26
SJO9:30 amSan José Juan Santamaria Intl
14h 30m
2 stops
SEA11:00 pmSeattle/Tacoma Intl
$527

American Airlines flights from Seattle to Costa Rica

Our best American Airlines deals on Seattle to Costa Rica flight tickets
American Airlines
Sep 12
SEA5:34 pmSeattle/Tacoma Intl
19h 13m
1 stop
LIR1:47 pmLiberia
Sep 18
LIR2:47 pmLiberia
21h 24m
2 stops
SEA11:11 amSeattle/Tacoma Intl
$439
American Airlines
Oct 10
SEA9:00 pmSeattle/Tacoma Intl
15h 18m
1 stop
LIR1:18 pmLiberia
Oct 22
LIR2:18 pmLiberia
10h 52m
1 stop
SEA12:10 amSeattle/Tacoma Intl
$530
American Airlines
Oct 10
SEA11:59 pmSeattle/Tacoma Intl
12h 19m
2 stops
LIR1:18 pmLiberia
Oct 22
LIR2:18 pmLiberia
20h 15m
1 stop
SEA9:33 amSeattle/Tacoma Intl
$535

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 29, 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

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Sat 9/12

5:34 pm-1:47 pm

1 stop19h 13m

Liberia

Fri 9/18

2:47 pm-11:11 am

2 stops21h 24m

$439

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Sat 9/12

10:45 pm-1:18 pm

2 stops13h 33m

Liberia

Fri 9/18

2:47 pm-10:09 am

2 stops20h 22m

$439

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 10/25

6:30 am-7:40 pm

2 stops12h 10m

San José Juan Santamaria Intl

Fri 10/30

1:30 pm-10:00 am

2 stops21h 30m

$506

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 11/2

9:25 pm-12:20 pm

2 stops12h 55m

San José Juan Santamaria Intl

Thu 11/12

2:10 pm-10:05 am

2 stops21h 55m

$506

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 10/29

11:18 pm-9:35 am

1 stop33h 17m

San José Juan Santamaria Intl

Sat 11/7

5:45 am-8:05 pm

1 stop16h 20m

$516

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 9/7

7:12 pm-11:40 pm

2 stops27h 28m

San José Juan Santamaria Intl

Thu 9/17

5:45 am-6:33 pm

2 stops13h 48m

$526

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Sun 1/24

9:20 pm-2:20 pm

1 stop15h 00m

Liberia

Thu 2/4

3:25 pm-10:26 am

1 stop21h 01m

$546

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Sun 1/24

6:00 pm-1:30 pm

1 stop17h 30m

Liberia

Fri 2/5

3:25 pm-10:26 am

1 stop21h 01m

$546
Quickest round-trip

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 10/4

8:20 am-7:30 pm

1 stop10h 10m

San José Juan Santamaria Intl

Sun 11/1

1:43 am-8:05 pm

1 stop20h 22m

$549

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 10/4

8:20 am-7:30 pm

1 stop10h 10m

San José Juan Santamaria Intl

Sun 11/1

1:43 am-10:34 pm

2 stops22h 51m

$553

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 $526, 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 $543.

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 $656 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 $613 on momondo.

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

There is only 1 cabin class 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

7h 07m

Direct flights

Sun

Airports in Costa Rica

40 airports
The fastest flight from Seattle to Costa Rica takes 7h 07m
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 $316Free CancellationRating
7.1
11,840 reviews
Search American Airlines flights
DeltaPriceFrom $345Free CancellationRating
7.8
8,486 reviews
Search Delta flights
Alaska AirlinesPriceFrom $357Free CancellationRating
7.9
12,727 reviews
Search Alaska Airlines flights
JetBluePriceFrom $362Free CancellationRating
7.1
3,024 reviews
Search JetBlue flights
United AirlinesPriceFrom $366Free CancellationRating
7.4
10,050 reviews
Search United Airlines flights
SouthwestPriceFrom $516Free CancellationRating
8.0
4,228 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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