$182 Find Cheap Flights from Costa Rica to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Seattle departing on 12/17. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Seattle, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$325
Overall average: $733
Alaska Airlines
Tue 12/16Fri 1/9
LIR - SEA • 1 stop
Cheapest one-way
$182
Typical prices: $312-$436
American Airlines
Wed 12/17
LIR - SEA • 1 stop
When to travel
October
Cheapest • 15% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Costa Rica to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Costa Rica to Seattle 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 Costa Rica to Seattle

Tue, Dec 16 - Fri, Jan 9
Alaska Airlines Logo
9:00 am - 8:35 pmLIR-SEA
13h 35m1 stop
Alaska Airlines Logo
8:15 pm - 6:01 pmSEA-LIR
19h 46m1 stop
$325Alaska Airlines
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Thu, Jan 22 - Mon, Jan 26
Delta Logo
3:05 pm - 10:07 amLIR-SEA
21h 02m1 stop
Delta Logo
3:35 pm - 1:24 pmSEA-LIR
19h 49m1 stop
$341Delta
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Tue, Dec 16 - Fri, Jan 9
Alaska Airlines Logo
9:00 am - 10:45 pmLIR-SEA
15h 45m2 stops
Alaska Airlines Logo
8:15 pm - 6:01 pmSEA-LIR
19h 46m1 stop
$344Alaska Airlines
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Thu, Jan 22 - Mon, Jan 26
United Airlines Logo
12:50 pm - 9:15 pmLIR-SEA
10h 25m1 stop
United Airlines Logo
12:24 pm - 1:10 pmSEA-LIR
22h 46m2 stops
$345United Airlines
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Thu, Apr 16 - Mon, Apr 20
United Airlines Logo
11:49 am - 9:45 amLIR-SEA
22h 56m1 stop
United Airlines Logo
5:00 am - 3:25 pmSEA-LIR
9h 25m1 stop
$356United Airlines
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Wed, May 6 - Mon, May 18
Avianca Logo
6:10 am - 10:18 pmSJO-SEA
17h 08m2 stops
Avianca Logo
5:00 pm - 8:40 amSEA-SJO
14h 40m2 stops
$427Avianca
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Sat, Dec 13 - Mon, Feb 2
Multiple Airlines Logo
1:30 am - 1:30 pmSJO-SEA
14h 00m1 stop
Multiple Airlines Logo
12:34 pm - 7:17 amSEA-SJO
40h 43m2 stops
$430Multiple Airlines
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Mon, Jan 19 - Sat, Jan 31
Multiple Airlines Logo
7:45 am - 10:29 pmSJO-SEA
16h 44m1 stop
Multiple Airlines Logo
8:06 am - 11:15 pmSEA-SJO
13h 09m2 stops
$431Multiple Airlines
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Wed, Apr 22 - Mon, Apr 27
American Airlines Logo
1:45 pm - 11:00 pmSJO-SEA
10h 15m1 stop
American Airlines Logo
11:59 pm - 1:09 pmSEA-SJO
12h 10m1 stop
$432American Airlines
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Fri, Dec 19 - Sat, Jan 10
American Airlines Logo
12:34 am - 7:12 pmSJO-SEA
20h 38m1 stop
American Airlines Logo
8:04 am - 10:30 pmSEA-SJO
12h 26m1 stop
$434American Airlines
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Booking Insights

KAYAK's insights & trends for flights to Seattle

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

What is the cheapest month to fly to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Seattle, 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 to Seattle is October, where tickets cost $476 on average for one-way flights. On the other hand, the most expensive months are June and December, where the average cost of tickets from Costa Rica is $641 and $619 respectively. For return trips, the best month to travel is October with an average price of $476.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Seattle, 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, you should book around 0 weeks before departure. For the absolute cheapest price, our data suggests you should book 39 days before departure.

Good to know

Low seasonJanuary
Cheapest flight$182
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 18% increase in price.
Flight from Liberia to Seattle

FAQs - booking Seattle flights

  • How far is Seattle/Tacoma Intl Airport from central Seattle?

    Central Seattle is 11 miles away from Seattle/Tacoma Intl Airport.

  • What is the name of Seattle’s airport?

    There is only 1 airport in Seattle, called Seattle/Tacoma Intl Airport (SEA). It can also be referred to as Seattle-Tacoma Intl, Seattle/Tacoma, or Seattle/Tacoma Intl.

  • What is the cheapest day to fly to Seattle?

    Based on KAYAK data, the cheapest day to fly to Seattle is Wednesday where tickets can be as cheap as $581. On the other hand, the most expensive day to fly is Tuesday, where prices are $676 on average.

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

    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 to Seattle.

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

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

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

    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 to Seattle 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 to Seattle?

    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 to Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Seattle?

    The cheapest time of day to fly to Seattle is generally in the afternoon, when flights cost $619 on average. The most expensive time of day to fly to Seattle is generally at night, which is peak travel time and where the average cost of a ticket is $680.

Top tips for finding cheap flights to Seattle

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Seattle flight deals.

Reviews of the top 3 airlines serving from Costa Rica to Seattle

 
See real verified KAYAK customer reviews for airlines flying to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Costa Rica to Seattle. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Seattle? 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 11316 reviews
8.1Boarding
7.8Comfort
7.0Entertainment
8.5Crew
7.1Food
Airline reviews

Flight from PSP delayed ~2hs and missed connection. Terrible service providing acommodations & food (no rides - just the hotel van every 30 min, which you have to call). 12 dollars in food for a 9 hour delay. 30+ minutes to get everything sorted out.

2.0 MediocreGaston, Nov 2025PSP - SEA
Read more Alaska Airlines reviews

Flight from PSP delayed ~2hs and missed connection. Terrible service providing acommodations & food (no rides - just the hotel van every 30 min, which you have to call). 12 dollars in food for a 9 hour delay. 30+ minutes to get everything sorted out.

Confusing now Hawaiian and Alaskan have merged, hard to check in - they need to uncomplicated things.

The crew in first class did an amazing job keeping me comfortable, well fed and with plenty to drink. They work hard and deserve to be recognized

I would have liked if the flight existed. To be fair the federal government canceled it. But, since it WAS canceled, I would have liked it if Alaska Airlines had moved a finger to assist me rather then abandoning me with my luggage, unable to check it, for 14 hours in Portland. So federal regulations forbid them from storing my bag? Then at least help me find storage or SOMETHING.

Hate this airline. Uncomfortable seats, no screens, no good food.

Have mounted entertainment for long flights instead of making customers use their own equipment

I wish my checked suitcase could have been checked since I arrived an hour before take off .

The staff was so kind and friendly! Boarding was efficient and communication was timely. I would seek out flying with Alaska Airlines in the future.

The cabin crew on this team was particularly kind and excellent.

Check in went pretty well and you didn't lose my bag. After I got a drink from the drink cart they charged me for it, and at the crazy overpriced airport rates. Never had that happen before, is that an american thing? what madness.

United has come a long way, it’s been a fantastic experience traveling with them.

Even though we were delayed, we were able to make our connection

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

Great crew, excellent landing, good food. Over all great experience. Thank you!

Older aircraft, no meal, only food was for purchase. Not impressed United.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Always wish for more healthy, gluten free options. We have to bring our own.

Having a long layover, I was very appreciative of the ability to stand by for an earlier flight. Other airlines like Delta have refused this to me in the past, just to be mean (because my ticket class wasn't high enough). United went out of their way to help me get to my destination early, which I really appreciated given that it was the third leg of a 24+ hour journey for me.

This flight leg was fantastic - super comfortable and a great selection of things to watch on the TV. Staff were excellent, really above and beyond.

Other than a way way too cold cabinets for the entire flight, all was great

More choices on snacks. Built-in video screen to enjoy entertainment choices.

we landed at cmh ten minutes early but had to sit on tarmac for twenty minutes because a plane was at our gate despite the fact that 3 other gates were open.

flight was good until we arrived at cmh ten minutes early but then sat on tarmac for twenty minutes because a plane was at our gate, so we had to wait despite the pilot tellling us that 3 other gates were open.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

I have a gluten allergy so did have any food

I have a gluten allergy so didn't have any food

Loved the crew . Absolutely no complaints. Except for luggage lost

Everything was good The connects, with no blame to crew. Or pilots. I understand they are short staffed. Everything went well for me. I'll be using you guys again in May if not sooner.

this plane was really old, had exit row seats and tray was in arm of seat so super uncomfortable to use. another seat they could t even use the tray it was broke. seat i. front of me had duct tape on it cause seat was ripped open... this plane should either be updated or retired.

Baggage handling poor. Second time this has happened. My bag went to San Francisco instead of Fiji. No apology. Luckily Nadi airport staff are fantastic. My bag arrived in Fiji the next day.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Lynnwood
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Fife
Westport
Mukilteo
Lakewood
Lacey
Aberdeen
Poulsbo
Edmonds
Woodinville
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DuPont
Monroe
Castle Rock
Edgewood

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle