$162 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 4/21. 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 José3 stops$442
Liberia
Liberia1 stop$416
San José
San José3 stops$442
Liberia
Liberia1 stop$416

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

Tue, Apr 21 - Fri, May 1
Multiple Airlines Logo
10:57 am - 6:20 am
SEA
-
LIR
18h 23m
1 stop
Multiple Airlines Logo
11:20 am - 5:42 pm
LIR
-
SEA
31h 22m
1 stop
$416Multiple Airlines
Fri, Apr 24 - Wed, Apr 29
Multiple Airlines Logo
8:41 am - 6:20 am
SEA
-
LIR
20h 39m
2 stops
Multiple Airlines Logo
11:20 am - 5:42 pm
LIR
-
SEA
31h 22m
1 stop
$435Multiple Airlines
Fri, Apr 17 - Wed, Apr 29
Multiple Airlines Logo
6:20 pm - 1:43 pm
SEA
-
LIR
18h 23m
1 stop
Multiple Airlines Logo
11:20 am - 8:50 pm
LIR
-
SEA
10h 30m
1 stop
$436Multiple Airlines
Thu, Apr 23 - Fri, May 1
Multiple Airlines Logo
10:57 am - 6:20 am
SEA
-
LIR
18h 23m
1 stop
Multiple Airlines Logo
11:20 am - 5:42 pm
LIR
-
SEA
31h 22m
1 stop
$437Multiple Airlines
Thu, Aug 13 - Thu, Aug 20
Multiple Airlines Logo
9:15 pm - 6:50 pm
SEA
-
SJO
20h 35m
3 stops
Multiple Airlines Logo
7:45 pm - 8:05 pm
SJO
-
SEA
25h 20m
2 stops
$442Multiple Airlines
Thu, Apr 23 - Wed, Apr 29
Multiple Airlines Logo
10:57 am - 6:20 am
SEA
-
LIR
18h 23m
1 stop
Multiple Airlines Logo
11:20 am - 5:42 pm
LIR
-
SEA
31h 22m
1 stop
$443Multiple Airlines
Tue, Apr 21 - Tue, Apr 28
Multiple Airlines Logo
9:08 am - 11:15 pm
SEA
-
SJO
13h 07m
2 stops
Multiple Airlines Logo
7:45 am - 9:47 pm
SJO
-
SEA
15h 02m
1 stop
$444Multiple Airlines
Mon, Apr 13 - Mon, Apr 20
Multiple Airlines Logo
5:59 pm - 6:20 am
SEA
-
LIR
11h 21m
1 stop
Multiple Airlines Logo
6:12 pm - 5:42 pm
LIR
-
SEA
24h 30m
1 stop
$445Multiple Airlines
Wed, Apr 22 - Wed, Apr 29
Alaska Airlines Logo
11:22 am - 6:20 am
SEA
-
LIR
17h 58m
2 stops
Alaska Airlines Logo
11:20 am - 9:17 am
LIR
-
SEA
22h 57m
2 stops
$451Alaska Airlines
Tue, Apr 14 - Tue, Apr 21
Alaska Airlines Logo
6:59 pm - 6:20 am
SEA
-
LIR
10h 21m
1 stop
Alaska Airlines Logo
6:12 pm - 9:29 am
LIR
-
SEA
16h 17m
1 stop
$455Alaska 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 $561 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 $561.

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 $757 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$162
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly with an average 30% increase 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 11982 reviews
7.1Food
8.1Boarding
7.0Entertainment
7.8Comfort
8.5Crew
Airline reviews

The flight was extremely smooth, and so was the landing. Great piloting.

10.0 ExcellentSara, Mar 2026
SEA - LAS
Read more Alaska Airlines reviews

The flight was extremely smooth, and so was the landing. Great piloting.

Plane was clean, staff was professional and flight was on time. No built in tv was still ok, as programs were offered that could synch to smart phones.

J was in the ER x 3...3 protruding discs...contacted Alaska many many days prior to cancel and request a refund or a credjt.. they only gave me 50 % credit....outrageous seeing how i have a doctors letter....just plain inhuman. AI sucks!

The flight was too short. No snacks or drinks offered.

The flight attendant was friendly and attentive. Although our interaction was brief—- it made a difference. The crew was upfront about turbulence. I like the Maui pretzels.

Everything was good. Please have a wheat free option for snacks in the future.

They are always so great! Friendly, on time if not early, organized boarding process. Great price too.

Crew very courteous. Boarding was great. Slow to get baggage at Denver.

Lester and the rest of the crew were such a joy. Also, I want to thank the pilots for getting us there on time, and safely. My first amd only choice will always be Alaska Airlines.

Not delay for a few passengers. That was uncalled for. If idiots can't make the flight on time thats their fault. Why should I be punished for them? No more holding the plane for one or two people

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

Mediocre. Boarding is now unpleasant. The employees, once friendly and nice, are now regularly speaking sternly to passengers, badgering them to do things right so they can take off on time and gate check bags because they don't have enough overhead bin space. The pretzel snack was crushed flat and broken into even smaller pieces, which happens frequently lately. Drink service was suspended before they reached my row.

The last 3 flights between BWI and BDL canceled the beverage service mid- way. Just say up front that the fight is too short. Thanks!

It was canceled. Supposedly weather. But there was no snow in Baltimore. At least we found out before driving to airport

I have not flown Southwest in awhile and had a very pleasant experience. From ticketing to boarding to the flight. The flight left on time and landed ahead of schedule. It won't be so long next time!!

The Southwest experience has definitely taken a dive from its early days. You can no longer deferentiate from other airlines. Air travel is too expensive. Southwest is no longer budget friendly. They have lost me as a loyal customer.

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

An entire day of delays. Cost lots of money. Meals and a hotel.

The WiFi and crew on the plane were good, however, the boarding experience was awful. I paid for the Choice Preferred and was boarded in group 5 so all overhead storage was full. They found room for our luggage, but further back making getting off the plane a nightmare. Also, we were in row 6 and the seats were extremely uncomfortable. Both my daughter and I had no leg room and couldn’t wait to get off the plane.

The charges were ridiculous for an hour flight and the turbulence was very scary.

The whole experience was excellent. As it most often is with Delta

Cabin was not pressurized properly. Several passengers had respiratory difficulties.

I was happy that I was able to get a last minute flight but unfortunately my seat was a middle seat. Even with Delta Comfort I wasn't comfortable

There’s not much to say about a one hour flight. This is a connection from LA to RNO that I missed the previous night due to a mechanical check delay on my originating flight from JFK to LAX. The short flight itself was fine. Instructions from the pilot and crew were per usual. The coffee was barely lukewarm, which possibly was purposeful so we would down it quickly. Bags were already on carousel upon reaching baggage claim, which was excellent.

Flight was warm for first few hours and quite rough

Seat was extremely hard which made even a short 1 hour 20 minute flight fairly uncomfortable.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The staff was fine. The plane was extremely tight, and I paid for the wifi and it did not work at all. I was actually going to ask for a refund.

two hour delay and the Delta representative on the PA system was unable to understand

An awesome flight crew. FC seat cushion just doesn’t cut it for a 3+ hour flight.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

It’s always a great time flying with united airlines.

Good flight. Efficient boarding and competent flight crew. No problems until we arrived at our destination gate. We were early so there was an aircraft at the gate that had to move before we could pull in. Then, due to the type of aircraft we flew, the cabin door could not be opened until some luggage from the cargo bay was offloaded to preserve center of gravity characteristics. So, that further delayed deplaning. Despite being 20 minutes early on landing, we ended up being 5 to 10 minutes late after all the delays.

Everything went well except the turbulence what no one have a control of but pilot and crew handled very good!

There was no WiFi available, there were mechanical problems with the plane and we landed at C 124, then the gate was switched to A 26, then all the way back to C126! For a 75 yo woman traveling alone, this was a difficult journey, indeed!

This trip did not start off well. The inbound flight was delayed about 20 minutes. Then, after initial onboarding, the passengers had to deplane due to a mechanical problem. That took about 30 minutes to fix and be cleared. Then, reboarding was chaotic. It took a long time to sort passengers and two passengers on standby were ticketed but there was no seat. So, they had to deplane. One of the flight crew was trying to help passengers figure out a place to put their carry-on bags and that took more time. In the end, our scheduled 10:30 am departure did not actually take off until about 12:05 pm CST. The flight itself was long but we got to Houston. Some passengers missed their connecting flights and had to rebook. Not the best of flights I've had.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Terrible because it was cancelled due to volcanic ash clouds in Guatemala while all other airlines kept flying. Had to pay for a hotel to stay overnight in Houston and try to fly next day.

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

Snow delayed boarding several times, which I understand happens. Issue I had was that after we did board, pilot told us we were going to roll out to be de-iced, then on our way. We were de-iced once, taxied to the tarmac and then stopped. Sat for another 30 minutes or so, the another de-icing. Then we rolled out to a parking spot, only to sit for another hour due to a traffic stop in DCA, which I'm confident they knew would happen before we boarded. Pilot gave no updates other than we had to hold, attendants did speak to the crew, but when asked, said the pilot would be updating us. We on the ground in the plane waiting for over 2 hours. They did communicate that bathrooms would be open, but no other news until we left. Would have been better to be up front about status.

Good crew and flight was on time. It’s a small plane with limited overhead luggage space. They said the overhead space was full and I had to check my bag. There was still space when I got on. Waiting for my checked luggage added 30 minutes to my trip. Not the end of the world but also not great.

My seat was assigned last row behind restrooms No legroom’s I’m very Pettit Still was not comfortable Food choice was excellent

Delayed initially because they couldn’t print the flight details. Poor instruction on delay. When I got on the plane the flight attendant argued with me about whether my carry on would fit (it did, although she didn’t acknowledge that). No greeting (other than arguing with me) getting on or off the plane.

Overall good. The pilots and flight attendants are excellent! The equipment was the issue on my First flight as they had to wait for a part to be installed. So the take off was at least 30 minutes later.

The worst Airline ever. They centered my second flight and leave me in NY. They don’t have any representatives at the airport and they don’t respond to calls. Basically I got stuck. I will never purchase through there again.

It was an older plane. First Class was not especially roomy or comfortable. It was a short flight so there were no meal but they did offer mixed nuts which used to be normal but now is rare. Crew member was very polite and professional.

The chicken wrap was tiny ($13 for what looked like a 1/3 of a normal wrap?) and disgusting.

It was a train wreck but on an airplane. First off, flight was delayed then we board only to hear two announcements, First weather delays in Orlando and second backup battery warning on emergency lights. After sitting on the plane for almost 2 hours they have us deplane due to the maintenance issue. We were told they were getting another plane. In the mean time, I notice another American- Orlando flight and ask the gate agent if I can switch. He says he cant help me and I'd have to walk to A13 from A37. Really!? I get down there and get a seat only to get an announcement my original flight was RE-boarding. The Then inflight there's no communication and I notice on flightaware were circling over the Gulf of America. I call the flight attendant and of course she has no clue and apparently 5m later the pilot finally tells us about another delay. Why does American always have these service and delay issues? They are my LAST choice in flights now!

Mediocre would be best description. Food bland. Seat biz class uncomfortable to sleep. Crew never dimmed lights completely in an overnight flight to Europe. Would avoid AA if possible.

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

Information on your arrival and departure airports