$171 Find Cheap Flights from Seattle to Costa Rica

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Costa Rica departing on 4/13. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Seattle to Costa Rica

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
San José
San José2 stops$360
Liberia
Liberia1 stop$440
San José
San José2 stops$360
Liberia
Liberia1 stop$440

Book Cheap Seattle to Costa Rica Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Costa Rica that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Costa Rica

Wed, Aug 5 - Sat, Aug 15
Multiple Airlines Logo
6:58 pm - 11:15 pm
SEA
-
SJO
27h 17m
2 stops
Multiple Airlines Logo
5:45 am - 11:00 am
SJO
-
SEA
30h 15m
2 stops
$360Multiple Airlines
Thu, May 28 - Thu, Jun 4
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
$363Multiple Airlines
Tue, Apr 14 - Tue, Apr 21
Multiple Airlines Logo
9:08 am - 11:15 pm
SEA
-
SJO
13h 07m
2 stops
Multiple Airlines Logo
5:45 am - 6:51 pm
SJO
-
SEA
14h 06m
2 stops
$379Multiple Airlines
Wed, Apr 29 - Wed, May 6
Multiple Airlines Logo
7:06 pm - 8:45 am
SEA
-
SJO
12h 39m
2 stops
Multiple Airlines Logo
5:05 am - 5:38 pm
SJO
-
SEA
13h 33m
2 stops
$381Multiple Airlines
Tue, Apr 28 - Tue, May 12
Multiple Airlines Logo
7:40 am - 11:15 pm
SEA
-
SJO
14h 35m
2 stops
Multiple Airlines Logo
5:45 am - 6:40 pm
SJO
-
SEA
13h 55m
2 stops
$387Multiple Airlines
Mon, Apr 13 - Thu, Apr 16
Southwest Logo
6:15 pm - 12:10 pm
SEA
-
SJO
16h 55m
2 stops
Southwest Logo
9:00 am - 12:05 am
SJO
-
SEA
16h 05m
2 stops
$400Southwest
Tue, Mar 10 - Tue, Mar 17
Multiple Airlines Logo
6:10 am - 11:15 pm
SEA
-
SJO
16h 05m
2 stops
Multiple Airlines Logo
6:00 am - 8:58 pm
SJO
-
SEA
15h 58m
2 stops
$401Multiple Airlines
Tue, Apr 7 - Mon, Apr 13
Air Canada Logo
10:20 am - 1:45 pm
SEA
-
LIR
26h 25m
2 stops
Air Canada Logo
2:50 pm - 9:33 am
LIR
-
SEA
43h 43m
2 stops
$461Air Canada
Mon, Mar 9 - Thu, Mar 12
Alaska Airlines Logo
2:43 pm - 6:36 am
SEA
-
LIR
14h 53m
2 stops
Alaska Airlines Logo
8:05 am - 8:51 am
LIR
-
SEA
25h 46m
2 stops
$462Alaska Airlines
Sat, Mar 7 - Thu, Mar 12
Alaska Airlines Logo
8:14 pm - 4:58 pm
SEA
-
LIR
18h 44m
1 stop
Alaska Airlines Logo
8:05 am - 8:51 am
LIR
-
SEA
25h 46m
2 stops
$472Alaska Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Costa Rica flights

Get data-powered insights and trends into flights from Seattle to Costa Rica to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Seattle to Costa Rica flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Costa Rica from Seattle found in the last 72 hours was to Liberia, at $575 round-trip. The most popular route is from Seattle (SEA) to Liberia (LIR), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $575.

What is the cheapest month to fly from Seattle to Costa Rica?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Costa Rica, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Costa Rica is October, when tickets cost $489 (return) on average. On the other hand, the most expensive months are April and December, when the average cost of round-trip tickets is $775 and $737 respectively.

How far in advance should I book a flight from Seattle to Costa Rica?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Costa Rica, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Costa Rica, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$171
Best time to beat the crowds with an average 19% drop in price.
Flight from Seattle to San José

FAQs - booking Costa Rica flights

  • What type of travel documents will I need to fly from Seattle to Costa Rica?

    Citizens of the United States traveling from Seattle to Costa Rica need a valid passport for the trip, and the passport must be valid for the entire length of their stay. There is no need to have a visa when you travel as a tourist so long as you do not plan on staying for more than 90 days, but you do need to provide a return plane ticket to customs authorities.

  • When renting a car in Costa Rica, what child car seat laws do I need to know about?

    Car seats are mandatory for any children 12 years old and under or for those that are 57 inches or shorter. Any child up to one year of age must be in a rear-facing car seat in the middle seat in the rear of the vehicle. Children from one year to four years old need to be in a front-facing car seat in the middle seat. Children from four to six years old must be in a booster seat with a back, and children from six years old to 12 years old need to be in a booster seat without a back.

  • Are there any good public transportation options to get me from San José Juan Santamaria International Airport to downtown San Jose?

    A quick and convenient way to get from the airport to the downtown area is aboard TUASA bus line 200 Alajuela, which makes the trip from the airport to downtown in around 30min.

  • If I am traveling to the seaside community of Golfito in Costa Rica, what is a good airport to use?

    Your best bet is to fly to the San José Juan Santamaria International Airport and then travel aboard the bus service offered by the Grupo Blanco number 699 bus that can make the trip in around 3h.

  • How does KAYAK find such low prices on flights from Seattle to Costa Rica?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Costa Rica.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Costa Rica?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Seattle to Costa Rica is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Costa Rica?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Seattle to Costa Rica with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Costa Rica?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Seattle to Costa Rica up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Costa Rica

  • One of the most common trips for people traveling from Seattle-Tacoma International Airport (SEA) to Costa Rica is to fly to Liberia Airport (LIR). On this route, you will find one-stop service aboard both United Airlines and American Airlines. If you are looking for a cheaper option on this route, consider one of the two-stop options aboard American Airlines.
  • Another popular destination for travelers making the trip from Seattle to Costa Rica is to fly to the San José Juan Santamaria International Airport (SJO). On this route, you will find one-stop service aboard Delta Airlines, United Airlines, American Airlines, and Spirit Airlines.
  • If you're looking for a way to get to the Seattle-Tacoma International Airport without having to drive your car, a good choice would be to take the King County Metro bus line 124, which makes the trip from downtown Seattle to the airport in around 45min.
  • A very quiet and comfortable place to wait for your flight to Costa Rica at the Seattle-Tacoma International Airport is at one of The Club SEA locations at the airport. There are also airline lounges available from United Airlines, Delta Airlines, and Alaska Airlines, as well as a Centurion Lounge at this airport.
  • If you are looking for a great way to get refreshed after a long flight from Seattle to Costa Rica, the San José Juan Santamaria International Airport offers showers in the terminal building for use by travelers after long trips.

Reviews of the top 5 airlines serving from Seattle to Costa Rica

 
Need help choosing which airline to fly with from Seattle to Costa Rica? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 11880 reviews
8.5Crew
7.8Comfort
8.1Boarding
7.0Entertainment
7.1Food
Airline reviews

I paid for the WiFi and it didn’t work during the whole flight

2.0 MediocreGloria, Feb 2026
SEA - SNA
Read more Alaska Airlines reviews

I paid for the WiFi and it didn’t work during the whole flight

Impressed that Alaska Air(for our domestic flight) transferred our checked bags to EVA (for our international flights) so that we didn't have to handle them, & we just picked them up at our final destination.

I enjoyed the movie selection. I’m glad I saw ahead of time to bring personal ear buds. I don’t normally have them with me and airlines used to give them out.

man & woman back side flight attendant was very rude. I live in Seattle. I use a lot of time Alaska flights. I always like them for fact that my favorite airline employees very rude. It’s disappointing. .

Great experience, staff and crew were very professional, friendly and helpful!

I think Alaska should start including free meals on these longer trips.

Wheelchair assistance was excellent. I had a saver fare, but was given a seat in Premium. So very nice!! Extra legroom, complimentary beer. The flight crew was very nice and efficient. The gate agent in Seattle double checked to make sure I was able to board the plane all right while using my cane. I boarded first. So considerate! The flight was smooth, and right on time.

There is nothing critical to complain about but I would say the snacks are pretty bad Airline staff could be aggressive the way they move through the aisles and the plane I also got hustled for a small wallet size men bag and force the consolidated with my carry on item we're talking about a wallet size bag.

Departed on time and had an efficient boarding process. The inflight wifi was not working on one of the flights.

How can I review what was denied to me. Instead of offering to let me pay for the ticket I got booted of my flight with no way home and no choice but to purchase another ticket for 12 hours later. Filing a complaint with the DOT

Sorry I didn't realize I was writing a review for each leg. Please see my previous review - it applies to the entire flight, not just a single leg.

This is the first time I've been disappointed with Delta. I was called by Delta to see if I would volunteer to change flights since my original flight home was overbooked. I accepted. The modified booking only provided me a 35 minute layover - when you subtract the fact that boarding closes for a flight 15 minutes early, that gave me 20 minutes to run for one end of the airport to the other. I barely made it. On the 2.5 hour flight to Tampa, the crew repeatedly let us know over the intercom that they cannot serve drinks or snacks due to safety/turbulence. I would have accepted this reason if they did not CONTINUALLY SERVE DRINKS AND COOKED FOOD to First class. If safety is the excuse then the entire plane should be strapped in for safety. On top of this the air conditioning vents were not working correctly and the plane was uncomfortably warm. I love Delta and am a loyal Delta traveler, and I have never had an experience like this. I don't know if there's a disconnect between availability among third-party sites like KAYAK and the airlines or what, but when overbooking causes issues like this for travelers it should be reviewed and changes to the booking process should be made. I blame BOTH KAYAK and Delta for this terrible experience.

boarded at 5:30 pm, pushed away from gate at 6pm ... takeoff was not until ~6:45pm; disappointing

Smooth boarding, pleasant and professional lady checking us in. Crew service was excellent, again pleasant, but professional. Nice touch-down on landing! Thank you Delta. 💗

Originally, I was booked in economy. I paid several hundred additional dollars to upgrade to first class. Then I paid several more hundred dollars to change my flight to a slightly earlier flight. I asked if the changed flight would also seat me in first class, and I was told that it would. When I boarded the plane, however, I was seated in economy. So, I paid $500-600 more than I paid for my original ticket for an upgrade and a changed flight - received the changed flight (which was nice), but did not receive the upgrade. So, I was not completely satisfied.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Paid for wifi that didn't work. No plug in seat to work. No entertainment.

We departed early and made up time in the air allowing us to arrive 30 minutes early. Capt was incredibly genuine and thanked every passenger for flying with Delta. Completely humble and professional!

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

This was one of the worst flights I’ve been on in years. I upgraded to comfort and had such an uncomfortable experience. The person next to me was oversized - which I understand - however, they took up their space and mine. I could only use about 50% of my seat space to not be physically touching this person the entire flight and there was no spatial awareness. I also could not use the seat outlet because their body was obstructing it. It was very inconvenient. Their body kept touching me repeatedly during the flight and I felt very uncomfortable. To pay more for an upgraded space and then not even being able to use it was highly disappointing.

Both of my flights arrived early and check in process was smooth

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

Short flight, but no drink/snack service. The flights both going and coming were delayed.

Much better than Spirit. I was please by the easy fast check in and boarding

Check-in and in-flight staff were better than average. The seat was a fair size but too hard and not enough padding. The cushion/pillow provided is poor (thin and seems to be disposable ,it provides no effective cushioning or support). Food was OK-ish but no choice of inflight snacks and no easy place to get drinks other than water (I could ask for juice by intruding into the staff area at the back of the plane) Entertainment was very good actually. Overall better than I expected from a US-based airline (sorry!) but compared to ANA or Singapore it was so-so. (I live in Japan so they are my comparative airlines)

Everything was on time Will use united again for sure

Plane outlets in my row not working to charge phone. Staff response was, well it should be. Plug into seed for volume not working well. Had to find the sweet spot for plug in or it would shut off and on.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Fine not above and beyond as I had a connection that was delayed due to maintenance

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

The seats are too uncomfortable for anyone over 5ft 8in. I'm 5'10" with a back and hip issue and I was in pai for the full duration of the flight.

The flight was on time/early, attentive crew, and everything overall went smoothly. Disappointed that WIFI was not working for the flight.

One day, I do so hope for a gluten free snack! Seems like with the rest of the world FINALLY figuring out what gluten free is, American Airlines would too. Fingers crossed!!

The flight was significantly delayed for 6.5 hours because of snow. There was no communication once the plane returned to the gate regarding when the flight would resume. Other flights were departing while our flight was being unloaded for reasons unknown. Our flight also seemed out of the queue regarding further deicing, refueling, and waiting to Taxi to the runway.

Flight was on time and the meal and service were good.

The accessible bathroom should be visible to people in Economy class.

Flight was delayed for 2 hours, then last minute the change to on time. The satélite location is far and a nightmare to get to.

This was a horrible experience. I’ve experienced several delays at this point and still not home. I was supposed to be home by 8:30 last night and here I sit at 7 am on a plane STILL unable to go home because of American Airlines.

Lexus in first class was absolutely amazing! Beat flight attendant i’ve ever seen.

Generally good. Flight left on time and the seats are comfortable. Plenty of space in front if you in you choose a comfort plus seat, completely worth spending the extra money given the amount of hours the flight lasts. The food tastes good but I would say it’s a the amount is too little. The crew was friendly and efficient. There was a some turbulence at different points into the flight. American Airlines has good deals to NZ if you book with plenty of time before you plan on going.

It was delayed and I lost my connection flight to Cali and I missed my Mom's funeral

I actually upgraded to the medium level of seats from basic and even doing that it may have been physically the most uncomfortable flight I have ever had. They packed everyone like is a train to death camp. It was a red eye so I hoped to get some sleep but it was physically impossible to find a comfortable way to rest. I met other folks on the same flight and they said the same thing. It was an utterly miserable flight and if I have any other options I will never fly with them again

Deplaning was a mess, I sat in business (seats are horrible) and the front door had a problem so we had to deplane from the rear exit. The stairs were not tall enough to reach so there was a large step down from the plane to the top of the stairs.

Staff are the rudest in the industry … awful customer service … will never fly Avianca again

Pros: we leave and arrive on time Cons: the most uncomfortable seats ever. You cant recline at all your seats. No entertainment No TVs flight attendants didn't provide even a glass of water. You have to go to back of the airplane and ask for one. I am Colombian and I remember seeing the flight attendants very neat, elegants which is or was a staple of Avianca.it was one with tennis shoes, no male up, the hair was messy... that was really odd.

Here we have another airline flying to Guatemala but doesn't have a plus or a less, just in the middle. Why? Well, first we don't have even free water Movie selection is poor Seats don't recline in some places Food selection is carb based Forgot to mention, customer service on the web is the worst. Good things; Very reliable on schedule Kind crew

Last seat of Bussines Class it does recline but passenger seating behind kept pushing since they did not have space once my seat was reclined

I like the crew members they're very friendly. Clean plane. The flight was on time. I dont like the comfort my car seat its better that the plane seats. They charge for everything. This airline was very good. Now it's a low cost airline

No free snacks nor drinks on very short 30min flight. Entertainment system is over wifi to your own phone or tablet, which is good but often a show or movie just stops and refuses to continue

I like the crew they're very friendly. I don't like. on five hour flight they not offered snacks. Any drink. Not even coffee

Everything you need to know for your flight from Seattle to Costa Rica

Information on your arrival and departure airports