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Cheap flights from Seattle to Costa Rica from $199

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 5/12. 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

Enter your travel dates to find the best prices.
Multiple Airlines Logo
1:50 pm - 8:30 am
SEA
-
SJO
17h 40m
2 stops
Multiple Airlines Logo
5:45 am - 9:07 pm
SJO
-
SEA
16h 22m
2 stops
$463Multiple Airlines
Fri, May 29 - Tue, Jun 2
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
2 stops
$471Multiple Airlines
Sat, May 23 - Sat, May 30
Multiple Airlines Logo
1:50 pm - 8:30 am
SEA
-
SJO
17h 40m
2 stops
Multiple Airlines Logo
4:35 pm - 10:12 am
SJO
-
SEA
18h 37m
2 stops
$479Multiple Airlines
Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
7:40 am - 11:15 pm
SEA
-
SJO
14h 35m
2 stops
Multiple Airlines Logo
7:45 am - 9:49 pm
SJO
-
SEA
15h 04m
1 stop
$486Multiple Airlines
Sat, May 9 - Sat, May 16
Air Canada Logo
8:00 am - 11:50 am
SEA
-
LIR
26h 50m
1 stop
Air Canada Logo
2:55 pm - 9:56 pm
LIR
-
SEA
33h 01m
2 stops
$590Air Canada
Fri, Oct 16 - Tue, Nov 10
Air Canada Logo
3:00 pm - 12:55 pm
SEA
-
LIR
20h 55m
2 stops
Air Canada Logo
2:55 pm - 6:26 pm
LIR
-
SEA
29h 31m
2 stops
$620Air Canada
Sat, Oct 24 - Tue, Nov 17
JetBlue Logo
11:52 pm - 12:40 pm
SEA
-
LIR
11h 48m
1 stop
JetBlue Logo
2:00 pm - 8:56 pm
LIR
-
SEA
31h 56m
1 stop
$633JetBlue
Tue, Jun 2 - Tue, Jun 9
WestJet Logo
10:30 am - 12:25 pm
SEA
-
LIR
24h 55m
2 stops
WestJet Logo
7:15 am - 6:45 pm
LIR
-
SEA
12h 30m
1 stop
$645WestJet
Sat, Jun 6 - Sun, Aug 9
JetBlue Logo
11:52 pm - 12:40 pm
SEA
-
LIR
11h 48m
1 stop
JetBlue Logo
2:00 pm - 8:56 pm
LIR
-
SEA
31h 56m
1 stop
$653JetBlue
Tue, Jun 2 - Tue, Jun 9
WestJet Logo
9:40 pm - 6:25 am
SEA
-
LIR
31h 45m
2 stops
WestJet Logo
7:15 am - 6:45 pm
LIR
-
SEA
12h 30m
1 stop
$659WestJet
Fri, Jun 5 - Sun, Aug 9

Alaska Airlines flights from Seattle to Costa Rica

Our best Alaska Airlines deals on Seattle to Costa Rica flight tickets
Alaska Airlines
May 4
SEA5:06 pmSeattle/Tacoma Intl
29h 39m
1 stop
SJO11:45 pmSan José Juan Santamaria Intl
May 18
SJO12:53 amSan José Juan Santamaria Intl
30h 09m
2 stops
SEA6:02 amSeattle/Tacoma Intl
$565
Alaska Airlines
May 6
SEA7:40 amSeattle/Tacoma Intl
15h 05m
1 stop
SJO11:45 pmSan José Juan Santamaria Intl
May 11
SJO12:55 amSan José Juan Santamaria Intl
18h 45m
1 stop
SEA6:40 pmSeattle/Tacoma Intl
$572
Alaska Airlines
May 26
SEA7:05 amSeattle/Tacoma Intl
15h 28m
2 stops
SJO11:33 pmSan José Juan Santamaria Intl
Jun 1
SJO12:53 amSan José Juan Santamaria Intl
13h 03m
1 stop
SEA12:56 pmSeattle/Tacoma Intl
$577

American Airlines flights from Seattle to Costa Rica

Our best American Airlines deals on Seattle to Costa Rica flight tickets
American Airlines
May 11
SEA6:19 pmSeattle/Tacoma Intl
15h 48m
2 stops
SJO11:07 amSan José Juan Santamaria Intl
May 14
SJO2:08 pmSan José Juan Santamaria Intl
11h 36m
1 stop
SEA12:44 amSeattle/Tacoma Intl
$577
American Airlines
Jun 10
SEA5:10 amSeattle/Tacoma Intl
16h 33m
1 stop
SJO10:43 pmSan José Juan Santamaria Intl
Jun 17
SJO11:59 pmSan José Juan Santamaria Intl
20h 16m
1 stop
SEA7:15 pmSeattle/Tacoma Intl
$598
American Airlines
May 1
SEA5:00 pmSeattle/Tacoma Intl
19h 22m
1 stop
SJO1:22 pmSan José Juan Santamaria Intl
May 6
SJO2:08 pmSan José Juan Santamaria Intl
11h 36m
1 stop
SEA12:44 amSeattle/Tacoma Intl
$628

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 April 30, 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

Fri 5/29

1:50 pm-8:30 am

2 stops17h 40m

San José Juan Santamaria Intl

Tue 6/2

5:45 am-9:07 pm

2 stops16h 22m

$463
Quickest round-trip

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 5/23

9:02 am-11:15 pm

2 stops13h 13m

San José Juan Santamaria Intl

Sat 5/30

5:45 am-6:56 pm

2 stops14h 11m

$471

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Wed 5/27

1:50 pm-8:30 am

2 stops17h 40m

San José Juan Santamaria Intl

Wed 6/3

4:35 pm-10:12 am

2 stops18h 37m

$479

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 5/9

7:40 am-11:15 pm

2 stops14h 35m

San José Juan Santamaria Intl

Sat 5/16

7:45 am-9:49 pm

1 stop15h 04m

$486

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Fri 10/16

8:00 am-11:50 am

1 stop26h 50m

Liberia

Tue 11/10

2:55 pm-9:56 pm

2 stops33h 01m

$590

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Sat 10/24

3:00 pm-12:55 pm

2 stops20h 55m

Liberia

Tue 11/17

2:55 pm-6:26 pm

2 stops29h 31m

$620

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Tue 6/2

11:52 pm-12:40 pm

1 stop11h 48m

Liberia

Tue 6/9

2:00 pm-8:56 pm

1 stop31h 56m

$633

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Sat 6/6

10:30 am-12:25 pm

2 stops24h 55m

Liberia

Sun 8/9

7:15 am-6:45 pm

1 stop12h 30m

$645

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Tue 6/2

11:52 pm-12:40 pm

1 stop11h 48m

Liberia

Tue 6/9

2:00 pm-8:56 pm

1 stop31h 56m

$653

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Fri 6/5

9:40 pm-6:25 am

2 stops31h 45m

Liberia

Sun 8/9

7:15 am-6:45 pm

1 stop12h 30m

$659

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 August. Flight prices, which tend to average around $152, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in August, then December is your next best option. Flight prices from Seattle to Costa Rica during December average around $166.

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 $626 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 $538 on momondo.

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

9h 01m

Direct flights

None
The fastest flight from Seattle to Costa Rica takes 9h 01m
There are no direct flights from Seattle to Costa Rica. There are no popular flight routes from Seattle to Costa Rica.
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
AviancaPriceFrom $152Free CancellationRating
6.5
2,518 reviews
Search Avianca flights
American AirlinesPriceFrom $316Free CancellationRating
7.1
11,682 reviews
Search American Airlines flights
DeltaPriceFrom $345Free CancellationRating
7.9
8,464 reviews
Search Delta flights
Alaska AirlinesPriceFrom $357Free CancellationRating
7.9
12,318 reviews
Search Alaska Airlines flights
JetBluePriceFrom $362Free CancellationRating
7.1
2,970 reviews
Search JetBlue flights
United AirlinesPriceFrom $381Free CancellationRating
7.4
9,677 reviews
Search United Airlines flights
SouthwestPriceFrom $516Free CancellationRating
8.0
4,317 reviews
Search Southwest flights
AeromexicoPriceFrom $766Free CancellationRating
7.4
1,520 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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