Find Cheap Flights from Seattle to Costa Rica

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Seattle to Costa Rica

(Round-trip)
Depart: Thu Jan 25 2018 Return: Tue Jan 30 2018 Trip spans 6 days
Multiple Airlines
Multiple Airlines
SEA
12:00a
SJO
3:40a
27h 40m
2 stops
SJO
12:00a
SEA
5:21a
29h 21m
2 stops
Depart: Sat Feb 3 2018 Return: Thu Feb 15 2018 Trip spans 13 days
Alaska Airlines
Alaska Airlines
SEA
12:00a
LIR
4:32p
16h 32m
1 stop
LIR
12:00a
SEA
11:01a
11h 01m
1 stop
Depart: Thu Mar 1 2018 Return: Fri Mar 9 2018 Trip spans 9 days
Aeromexico
Aeromexico
SEA
12:00a
SJO
11:25a
11h 25m
1 stop
SJO
12:00a
SEA
4:00p
16h 00m
1 stop
Depart: Sat Apr 21 2018 Return: Thu Apr 26 2018 Trip spans 6 days
American Airlines
American Airlines
SEA
12:00a
LIR
2:25p
14h 25m
1 stop
LIR
12:00a
SEA
6:44p
18h 44m
1 stop
Depart: Fri Nov 24 2017 Return: Thu Nov 30 2017 Trip spans 7 days
United
United
SEA
12:00a
LIR
11:40a
11h 40m
1 stop
LIR
12:00a
SEA
11:59a
11h 59m
1 stop
Depart: Wed Jan 24 2018 Return: Wed Jan 31 2018 Trip spans 8 days
Delta
Delta
SEA
12:00a
LIR
5:50p
17h 50m
1 stop
LIR
12:00a
SEA
5:25p
17h 25m
1 stop
Depart: Tue Oct 24 2017 Return: Tue Oct 31 2017 Trip spans 8 days
Avianca
Avianca
SEA
12:00a
SJO
1:58p
13h 58m
2 stops
SJO
12:00a
SEA
4:36p
16h 36m
2 stops
Depart: Tue Jan 16 2018 Return: Tue Jan 23 2018 Trip spans 8 days
Multiple Airlines
Multiple Airlines
SEA
12:00a
SJO
9:00p
21h 00m
2 stops
SJO
12:00a
SEA
1:33a
25h 33m
2 stops
Depart: Thu Nov 30 2017 Return: Mon Dec 11 2017 Trip spans 12 days
Multiple Airlines
Multiple Airlines
SEA
12:00a
SJO
2:40a
26h 40m
2 stops
SJO
12:00a
SEA
2:45a
26h 45m
2 stops
Depart: Thu Dec 7 2017 Return: Thu Dec 14 2017 Trip spans 8 days
Aeromexico
Aeromexico
SEA
12:00a
SJO
3:15a
27h 15m
2 stops
SJO
12:00a
SEA
4:00p
16h 00m
1 stop
Depart: Sat Mar 3 2018 Return: Tue Mar 13 2018 Trip spans 10 days
Alaska Airlines
Alaska Airlines
SEA
12:00a
LIR
4:32p
16h 32m
1 stop
LIR
12:00a
SEA
6:24p
18h 24m
2 stops
Depart: Tue Dec 5 2017 Return: Sun Dec 10 2017 Trip spans 6 days
Multiple Airlines
Multiple Airlines
SEA
12:00a
SJO
7:25p
19h 25m
2 stops
SJO
12:00a
SEA
4:25a
28h 25m
2 stops
Depart: Tue Mar 6 2018 Return: Wed Mar 14 2018 Trip spans 8 days
Delta
Delta
SEA
12:00a
LIR
11:07a
11h 07m
1 stop
LIR
12:00a
SEA
1:20p
13h 20m
1 stop
Depart: Mon Apr 9 2018 Return: Wed Apr 18 2018 Trip spans 10 days
United
United
SEA
12:00a
LIR
10:15a
10h 15m
1 stop
LIR
12:00a
SEA
4:45p
16h 45m
1 stop
Depart: Fri Apr 13 2018 Return: Sun Apr 22 2018 Trip spans 10 days
Aeromexico
Aeromexico
SEA
12:00a
SJO
11:25a
11h 25m
1 stop
SJO
12:00a
SEA
11:10a
35h 10m
2 stops
Depart: Sat Feb 10 2018 Return: Mon Feb 19 2018 Trip spans 10 days
Multiple Airlines
Multiple Airlines
SEA
12:00a
SJO
9:35p
21h 35m
2 stops
SJO
12:00a
SEA
6:01a
30h 01m
2 stops
Depart: Sat Feb 3 2018 Return: Tue Mar 6 2018 Trip spans 32 days
Alaska Airlines
Alaska Airlines
SEA
12:00a
LIR
4:32p
16h 32m
1 stop
LIR
12:00a
SEA
5:11p
17h 11m
1 stop
Depart: Tue Feb 6 2018 Return: Tue Feb 20 2018 Trip spans 15 days
Multiple Airlines
Multiple Airlines
SEA
12:00a
SJO
10:48p
22h 48m
2 stops
SJO
12:00a
SEA
8:46p
20h 46m
2 stops
Depart: Sat Feb 10 2018 Return: Sat Feb 24 2018 Trip spans 15 days
Aeromexico
Aeromexico
SEA
12:00a
SJO
11:25a
11h 25m
1 stop
SJO
12:00a
SEA
10:14a
58h 14m
2 stops
Depart: Wed Dec 13 2017 Return: Sun Dec 24 2017 Trip spans 12 days
Delta
Delta
SEA
12:00a
LIR
11:23a
11h 23m
2 stops
LIR
12:00a
SEA
3:24p
15h 24m
2 stops
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an email and someone from our team will get back to you promptly.

Airports
Origin

Seattle
$421
Destination

Liberia
$537
San Jose
$421