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Cheap flights from Seattle to Costa Rica from $174

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 4/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
11:20 am - 6:20 am
SEA
-
LIR
18h 00m
2 stops
Alaska Airlines Logo
7:40 am - 7:13 am
LIR
-
SEA
24h 33m
2 stops
$460Alaska Airlines
Mon, Apr 13 - Fri, Apr 17
Multiple Airlines Logo
9:02 am - 11:15 pm
SEA
-
SJO
13h 13m
2 stops
Multiple Airlines Logo
5:45 am - 6:56 pm
SJO
-
SEA
14h 11m
1 stop
$463Multiple Airlines
Tue, May 19 - Tue, May 26
Multiple Airlines Logo
4:28 pm - 11:30 am
SEA
-
SJO
18h 02m
2 stops
Multiple Airlines Logo
3:10 pm - 10:00 am
SJO
-
SEA
19h 50m
2 stops
$465Multiple Airlines
Tue, May 19 - Tue, May 26
Southwest Logo
1:25 pm - 12:10 pm
SEA
-
SJO
21h 45m
2 stops
Southwest Logo
9:00 am - 12:05 am
SJO
-
SEA
16h 05m
2 stops
$466Southwest
Tue, May 5 - Thu, May 14
Multiple Airlines Logo
7:06 pm - 8:45 am
SEA
-
SJO
12h 39m
2 stops
Multiple Airlines Logo
12:40 pm - 11:52 am
SJO
-
SEA
24h 12m
3 stops
$467Multiple Airlines
Sat, Apr 25 - Sat, May 9
Multiple Airlines Logo
9:08 am - 11:15 pm
SEA
-
SJO
13h 07m
2 stops
Multiple Airlines Logo
5:25 pm - 8:50 pm
SJO
-
SEA
28h 25m
2 stops
$470Multiple Airlines
Tue, Apr 14 - Tue, Apr 21
Multiple Airlines Logo
9:15 pm - 11:40 pm
SEA
-
SJO
25h 25m
2 stops
Multiple Airlines Logo
12:40 pm - 10:42 am
SJO
-
SEA
23h 02m
3 stops
$475Multiple Airlines
Thu, Apr 9 - Tue, Apr 21
Alaska Airlines Logo
8:08 pm - 5:02 pm
SEA
-
LIR
19h 54m
1 stop
Alaska Airlines Logo
7:40 am - 7:13 am
LIR
-
SEA
24h 33m
2 stops
$479Alaska Airlines
Mon, Apr 13 - Fri, Apr 17
Alaska Airlines Logo
11:20 am - 6:20 am
SEA
-
LIR
18h 00m
2 stops
Alaska Airlines Logo
7:40 am - 6:16 am
LIR
-
SEA
23h 36m
2 stops
$480Alaska Airlines
Mon, Apr 13 - Mon, Apr 20
Multiple Airlines Logo
9:00 am - 11:15 pm
SEA
-
SJO
13h 15m
2 stops
Multiple Airlines Logo
5:05 am - 5:38 pm
SJO
-
SEA
13h 33m
2 stops
$480Multiple Airlines
Thu, Apr 30 - Mon, May 4

Southwest flights from Seattle to Costa Rica

Our best Southwest deals on Seattle to Costa Rica flight tickets
Southwest
May 5
SEA1:25 pmSeattle/Tacoma Intl
21h 45m
2 stops
SJO12:10 pmSan José Juan Santamaria Intl
May 14
SJO9:00 amSan José Juan Santamaria Intl
16h 05m
2 stops
SEA12:05 amSeattle/Tacoma Intl
$466
Southwest
Apr 25
SEA2:15 pmSeattle/Tacoma Intl
21h 45m
2 stops
SJO1:00 pmSan José Juan Santamaria Intl
May 1
SJO9:00 amSan José Juan Santamaria Intl
16h 05m
2 stops
SEA12:05 amSeattle/Tacoma Intl
$494
Southwest
Apr 27
SEA5:35 pmSeattle/Tacoma Intl
18h 40m
2 stops
LIR1:15 pmLiberia
May 4
LIR2:10 pmLiberia
11h 45m
2 stops
SEA12:55 amSeattle/Tacoma Intl
$545

American Airlines flights from Seattle to Costa Rica

Our best American Airlines deals on Seattle to Costa Rica flight tickets
American Airlines
Mar 17
SEA10:08 pmSeattle/Tacoma Intl
12h 38m
1 stop
SJO11:46 amSan José Juan Santamaria Intl
Apr 15
SJO11:35 pmSan José Juan Santamaria Intl
14h 40m
1 stop
SEA1:15 pmSeattle/Tacoma Intl
$572
American Airlines
Mar 16
SEA10:08 pmSeattle/Tacoma Intl
13h 42m
1 stop
SJO12:50 pmSan José Juan Santamaria Intl
Mar 20
SJO6:00 amSan José Juan Santamaria Intl
19h 24m
1 stop
SEA12:24 amSeattle/Tacoma Intl
$588
American Airlines
Mar 16
SEA6:00 amSeattle/Tacoma Intl
12h 33m
2 stops
SJO7:33 pmSan José Juan Santamaria Intl
Mar 20
SJO6:00 amSan José Juan Santamaria Intl
19h 24m
1 stop
SEA12:24 amSeattle/Tacoma Intl
$593

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 March 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

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Mon 4/13

11:20 am-6:20 am

2 stops18h 00m

Liberia

Fri 4/17

7:40 am-7:13 am

2 stops24h 33m

$460

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 5/19

9:02 am-11:15 pm

2 stops13h 13m

San José Juan Santamaria Intl

Tue 5/26

5:45 am-6:56 pm

1 stop14h 11m

$463

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 5/19

4:28 pm-11:30 am

2 stops18h 02m

San José Juan Santamaria Intl

Tue 5/26

3:10 pm-10:00 am

2 stops19h 50m

$465

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 5/5

1:25 pm-12:10 pm

2 stops21h 45m

San José Juan Santamaria Intl

Thu 5/14

9:00 am-12:05 am

2 stops16h 05m

$466

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 4/25

7:06 pm-8:45 am

2 stops12h 39m

San José Juan Santamaria Intl

Sat 5/9

12:40 pm-11:52 am

3 stops24h 12m

$467

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 4/14

9:08 am-11:15 pm

2 stops13h 07m

San José Juan Santamaria Intl

Tue 4/21

5:25 pm-8:50 pm

2 stops28h 25m

$470

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 4/9

9:15 pm-11:40 pm

2 stops25h 25m

San José Juan Santamaria Intl

Tue 4/21

12:40 pm-10:42 am

3 stops23h 02m

$475

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Mon 4/13

8:08 pm-5:02 pm

1 stop19h 54m

Liberia

Fri 4/17

7:40 am-7:13 am

2 stops24h 33m

$479

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Mon 4/13

11:20 am-6:20 am

2 stops18h 00m

Liberia

Mon 4/20

7:40 am-6:16 am

2 stops23h 36m

$480
Quickest round-trip

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 4/30

9:00 am-11:15 pm

2 stops13h 15m

San José Juan Santamaria Intl

Mon 5/4

5:05 am-5:38 pm

2 stops13h 33m

$480

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 October. Flight prices, which tend to average around $489, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in October, then September is your next best option. Flight prices from Seattle to Costa Rica during September average around $494.

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 $611 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 $534 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 23% 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

7h 04m

Direct flights

Sun

Airports in Costa Rica

40 airports
The fastest flight from Seattle to Costa Rica takes 7h 04m
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

  • 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
6.5
2,498 reviews
Search Avianca flights
DeltaPriceFrom $254Free CancellationRating
7.9
8,293 reviews
Search Delta flights
American AirlinesPriceFrom $316Free CancellationRating
7.1
11,469 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $357Free CancellationRating
7.9
12,050 reviews
Search Alaska Airlines flights
JetBluePriceFrom $362Free CancellationRating
7.2
2,907 reviews
Search JetBlue flights
United AirlinesPriceFrom $389Free CancellationRating
7.4
9,426 reviews
Search United Airlines flights
SouthwestPriceFrom $568Free CancellationRating
8.0
4,318 reviews
Search Southwest flights
AeromexicoPriceFrom $766Free CancellationRating
7.4
1,565 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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