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Cheap flights from Seattle to Costa Rica from $151

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 2/2. 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

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:53 pm - 11:15 pmSEA-SJO
26h 22m2 stops
Multiple Airlines Logo
5:10 pm - 9:08 pmSJO-SEA
29h 58m1 stop
$373Multiple Airlines
Find Deal
Fri, Jan 16 - Sat, Jan 24
Multiple Airlines Logo
9:45 am - 11:15 pmSEA-SJO
12h 30m2 stops
Multiple Airlines Logo
6:10 am - 6:47 pmSJO-SEA
13h 37m2 stops
$375Multiple Airlines
Find Deal
Tue, Mar 31 - Tue, Apr 14
Multiple Airlines Logo
6:53 pm - 8:40 amSEA-SJO
11h 47m2 stops
Multiple Airlines Logo
6:00 am - 10:46 pmSJO-SEA
18h 46m2 stops
$376Multiple Airlines
Find Deal
Sun, Jan 11 - Sat, Jan 31
Delta Logo
12:45 pm - 7:00 amSEA-SJO
16h 15m1 stop
Delta Logo
8:30 am - 11:00 pmSJO-SEA
16h 30m1 stop
$412Delta
Find Deal
Fri, Dec 5 - Sun, Dec 21
Delta Logo
3:42 pm - 1:05 pmSEA-SJO
19h 23m1 stop
Delta Logo
7:00 am - 11:59 pmSJO-SEA
18h 59m1 stop
$414Delta
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Thu, Nov 13 - Sun, Nov 16
American Airlines Logo
7:15 am - 9:11 pmSEA-SJO
11h 56m1 stop
American Airlines Logo
7:00 am - 9:50 pmSJO-SEA
16h 50m2 stops
$416American Airlines
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Sat, Dec 6 - Tue, Dec 16
American Airlines Logo
12:38 am - 10:28 pmSEA-SJO
19h 50m1 stop
American Airlines Logo
12:34 am - 7:12 pmSJO-SEA
20h 38m1 stop
$417American Airlines
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Thu, Dec 4 - Sat, Dec 20
United Airlines Logo
7:00 am - 8:39 pmSEA-SJO
11h 39m1 stop
United Airlines Logo
2:20 pm - 11:00 pmSJO-SEA
10h 40m1 stop
$418United Airlines
Find Deal
Sun, Feb 8 - Wed, Feb 18
Alaska Airlines Logo
11:36 am - 6:20 amSEA-LIR
16h 44m2 stops
Alaska Airlines Logo
7:17 pm - 9:02 amLIR-SEA
15h 45m1 stop
$422Alaska Airlines
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Wed, Dec 10 - Wed, Dec 17
Alaska Airlines Logo
11:26 am - 6:20 amSEA-LIR
16h 54m2 stops
Alaska Airlines Logo
7:17 pm - 6:55 pmLIR-SEA
25h 38m2 stops
$436Alaska Airlines
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Wed, Dec 3 - Wed, Dec 10

Delta flights from Seattle to Costa Rica

Our best Delta deals on Seattle to Costa Rica flight tickets
Delta
Dec 5
SEA12:45 pmSeattle/Tacoma Intl
16h 15m
1 stop
SJO7:00 amSan José Juan Santamaria Intl
Dec 21
SJO8:30 amSan José Juan Santamaria Intl
16h 30m
1 stop
SEA11:00 pmSeattle/Tacoma Intl
$412
Find similar
Delta
Nov 13
SEA3:42 pmSeattle/Tacoma Intl
19h 23m
1 stop
SJO1:05 pmSan José Juan Santamaria Intl
Nov 16
SJO7:00 amSan José Juan Santamaria Intl
18h 59m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
$414
Find similar
Delta
Nov 13
SEA3:42 pmSeattle/Tacoma Intl
19h 23m
1 stop
SJO1:05 pmSan José Juan Santamaria Intl
Nov 17
SJO7:00 amSan José Juan Santamaria Intl
18h 59m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
$456
Find similar

Avianca flights from Seattle to Costa Rica

Our best Avianca deals on Seattle to Costa Rica flight tickets
Avianca
Apr 7
SEA6:30 amSeattle/Tacoma Intl
15h 45m
1 stop
SJO11:15 pmSan José Juan Santamaria Intl
Apr 14
SJO6:10 amSan José Juan Santamaria Intl
17h 08m
1 stop
SEA10:18 pmSeattle/Tacoma Intl
$386
Find similar
Avianca
Feb 24
SEA8:45 amSeattle/Tacoma Intl
12h 30m
1 stop
SJO11:15 pmSan José Juan Santamaria Intl
Mar 10
SJO6:00 amSan José Juan Santamaria Intl
18h 16m
1 stop
SEA11:16 pmSeattle/Tacoma Intl
$394
Find similar
Avianca
Jan 11
SEA9:00 amSeattle/Tacoma Intl
12h 40m
2 stops
SJO11:40 pmSan José Juan Santamaria Intl
Jan 31
SJO6:00 amSan José Juan Santamaria Intl
19h 47m
1 stop
SEA11:47 pmSeattle/Tacoma Intl
$401
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 October 30, 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

Fri 1/16

6:53 pm-11:15 pm

2 stops26h 22m

San José Juan Santamaria Intl

Sat 1/24

5:10 pm-9:08 pm

1 stop29h 58m

$373

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 3/31

9:45 am-11:15 pm

2 stops12h 30m

San José Juan Santamaria Intl

Tue 4/14

6:10 am-6:47 pm

2 stops13h 37m

$375

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 1/11

6:53 pm-8:40 am

2 stops11h 47m

San José Juan Santamaria Intl

Sat 1/31

6:00 am-10:46 pm

2 stops18h 46m

$376

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Fri 12/5

12:45 pm-7:00 am

1 stop16h 15m

San José Juan Santamaria Intl

Sun 12/21

8:30 am-11:00 pm

1 stop16h 30m

$412

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 11/13

3:42 pm-1:05 pm

1 stop19h 23m

San José Juan Santamaria Intl

Sun 11/16

7:00 am-11:59 pm

1 stop18h 59m

$414

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 12/6

7:15 am-9:11 pm

1 stop11h 56m

San José Juan Santamaria Intl

Tue 12/16

7:00 am-9:50 pm

2 stops16h 50m

$416

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 12/4

12:38 am-10:28 pm

1 stop19h 50m

San José Juan Santamaria Intl

Sat 12/20

12:34 am-7:12 pm

1 stop20h 38m

$417

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 2/8

7:00 am-8:39 pm

1 stop11h 39m

San José Juan Santamaria Intl

Wed 2/18

2:20 pm-11:00 pm

1 stop10h 40m

$418

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Wed 12/10

11:36 am-6:20 am

2 stops16h 44m

Liberia

Wed 12/17

7:17 pm-9:02 am

1 stop15h 45m

$422

SeattleLiberia

SEA - LIR

SEALIR

Seattle/Tacoma Intl

Wed 12/3

11:26 am-6:20 am

2 stops16h 54m

Liberia

Wed 12/10

7:17 pm-6:55 pm

2 stops25h 38m

$436

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 $501, 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 $512.

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 $637 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 $532 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 32% 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

$1,397

Fastest flight time

6h 56m

Direct flights

Sun

Airports in Costa Rica

1 airport
The best flight deal from Seattle to Costa Rica found on momondo in the last 72 hours is $1,397
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)
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
6.6
2,467 reviews
Search Avianca flights
DeltaPriceFrom $280Free CancellationRating
7.9
7,998 reviews
Search Delta flights
American AirlinesPriceFrom $373Free CancellationRating
7.2
11,034 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $405Free CancellationRating
8.0
11,220 reviews
Search Alaska Airlines flights
Copa AirlinesPriceFrom $423Free CancellationRating
7.6
1,561 reviews
Search Copa Airlines flights
United AirlinesPriceFrom $434Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
SouthwestPriceFrom $568Free CancellationRating
8.0
4,243 reviews
Search Southwest flights
AeromexicoPriceFrom $782Free CancellationRating
7.4
1,674 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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