Find Cheap Flights from Costa Rica to Seattle

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.
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Book cheap flights from Costa Rica to Seattle

(Round-trip)
Depart: Wed May 17 2017 Return: Sun May 21 2017 Trip spans 5 days
Alaska Airlines
Alaska Airlines
SJO
12:10p
SEA
7:06a
18h 56m
1 stop
SEA
2:00a
SJO
10:10a
32h 10m
1 stop
Depart: Tue Sep 19 2017 Return: Sat Sep 23 2017 Trip spans 5 days
Avianca
Avianca
SJO
1:03p
SEA
2:38p
25h 35m
2 stops
SEA
9:30a
SJO
4:58a
19h 28m
2 stops
Depart: Thu Sep 14 2017 Return: Wed Sep 20 2017 Trip spans 7 days
United
United
SJO
2:30a
SEA
7:10p
16h 40m
1 stop
SEA
8:30p
SJO
6:55a
10h 25m
1 stop
Depart: Sun Aug 13 2017 Return: Tue Aug 29 2017 Trip spans 17 days
Delta
Delta
SJO
4:35a
SEA
8:12p
15h 37m
2 stops
SEA
2:15p
SJO
6:46a
16h 31m
2 stops
Depart: Tue Jul 25 2017 Return: Mon Aug 7 2017 Trip spans 14 days
American Airlines
American Airlines
SJO
10:35a
SEA
7:01a
20h 26m
1 stop
SEA
6:20p
SJO
8:42a
14h 22m
1 stop
Depart: Wed Sep 13 2017 Return: Sun Sep 24 2017 Trip spans 12 days
Alaska Airlines
Alaska Airlines
SJO
12:10p
SEA
11:35p
11h 25m
1 stop
SEA
5:25p
SJO
10:10a
16h 45m
1 stop
Depart: Sat Sep 16 2017 Return: Sun Sep 24 2017 Trip spans 9 days
Alaska Airlines
Alaska Airlines
SJO
12:10p
SEA
5:29a
17h 19m
1 stop
SEA
5:25p
SJO
10:10a
16h 45m
1 stop
Depart: Mon Sep 18 2017 Return: Sun Sep 24 2017 Trip spans 7 days
Alaska Airlines
Alaska Airlines
SJO
12:10p
SEA
7:29a
19h 19m
1 stop
SEA
5:25p
SJO
10:10a
16h 45m
1 stop
Depart: Fri Jun 30 2017 Return: Sat Jul 29 2017 Trip spans 30 days
United
United
SJO
2:30a
SEA
4:46a
26h 16m
2 stops
SEA
1:30a
SJO
5:10p
15h 40m
1 stop
Depart: Tue Aug 15 2017 Return: Sun Aug 20 2017 Trip spans 6 days
American Airlines
American Airlines
SJO
10:35a
SEA
7:01a
20h 26m
1 stop
SEA
6:30p
SJO
6:40a
12h 10m
1 stop
Depart: Fri Sep 15 2017 Return: Sun Sep 24 2017 Trip spans 10 days
Alaska Airlines
Alaska Airlines
SJO
12:10p
SEA
5:29a
17h 19m
1 stop
SEA
5:25p
SJO
10:10a
16h 45m
1 stop
Depart: Sun May 21 2017 Return: Sun May 28 2017 Trip spans 8 days
American Airlines
American Airlines
SJO
2:50a
SEA
9:39p
18h 49m
1 stop
SEA
6:35p
SJO
6:43a
12h 08m
1 stop
Depart: Wed Jun 14 2017 Return: Wed Jun 28 2017 Trip spans 15 days
United
United
SJO
8:40a
SEA
9:15p
12h 35m
1 stop
SEA
1:30a
SJO
3:20p
13h 50m
1 stop
Depart: Fri Oct 27 2017 Return: Tue Oct 31 2017 Trip spans 5 days
Alaska Airlines
Alaska Airlines
SJO
12:10p
SEA
9:00a
20h 50m
1 stop
SEA
2:55p
SJO
10:10a
19h 15m
1 stop
Depart: Thu Jun 29 2017 Return: Mon Jul 3 2017 Trip spans 5 days
United
United
SJO
10:05a
SEA
9:15p
11h 10m
1 stop
SEA
6:30p
SJO
6:35a
12h 05m
1 stop
Depart: Thu Jul 27 2017 Return: Mon Aug 7 2017 Trip spans 12 days
American Airlines
American Airlines
SJO
10:35a
SEA
7:58p
33h 23m
1 stop
SEA
6:20p
SJO
8:42a
14h 22m
1 stop
Depart: Wed Aug 16 2017 Return: Sun Aug 20 2017 Trip spans 5 days
Alaska Airlines
Alaska Airlines
SJO
12:10p
SEA
6:27a
18h 17m
2 stops
SEA
4:00p
SJO
10:10a
18h 10m
2 stops
Depart: Thu Jul 6 2017 Return: Sat Jul 15 2017 Trip spans 10 days
American Airlines
American Airlines
SJO
2:55a
SEA
7:53p
16h 58m
1 stop
SEA
1:45p
SJO
1:02p
23h 17m
1 stop
Depart: Fri Jul 7 2017 Return: Mon Jul 17 2017 Trip spans 11 days
United
United
SJO
9:05p
SEA
6:57a
9h 52m
1 stop
SEA
1:32p
SJO
8:00a
18h 28m
2 stops
Depart: Sat Jul 22 2017 Return: Sun Aug 6 2017 Trip spans 16 days
United
United
SJO
9:05p
SEA
7:16a
10h 11m
1 stop
SEA
1:15p
SJO
6:35a
17h 20m
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.

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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.

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Airports
Origin

San Jose
$552
Destination

Seattle
$552