Find Cheap Flights from Washington 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.
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Book cheap flights from Washington to Costa Rica

(Round-trip)
Depart: Sat Jun 3 2017 Return: Tue Jun 6 2017 Trip spans 4 days
Major Airline
Major Airline
IAD
3:10a
SJO
3:30p
12h 20m
1 stop
SJO
9:47p
IAD
11:10a
13h 23m
1 stop
Depart: Tue May 23 2017 Return: Wed May 24 2017 Trip spans 2 days
JetBlue
JetBlue
DCA
2:00a
SJO
9:32a
7h 32m
1 stop
SJO
8:28a
DCA
3:59p
7h 31m
1 stop
Depart: Tue Sep 12 2017 Return: Tue Oct 17 2017 Trip spans 36 days
Copa Airlines
Copa Airlines
IAD
12:29p
SJO
8:21p
7h 52m
1 stop
SJO
4:27a
IAD
6:55p
14h 28m
1 stop
Depart: Mon May 1 2017 Return: Wed May 3 2017 Trip spans 3 days
American Airlines
American Airlines
DCA
4:55a
SJO
11:42a
6h 47m
1 stop
SJO
10:35a
DCA
1:56a
15h 21m
1 stop
Depart: Tue Jun 20 2017 Return: Wed Jun 21 2017 Trip spans 2 days
United
United
DCA
3:10a
SJO
6:20p
15h 10m
1 stop
SJO
3:00a
DCA
2:00p
11h 00m
1 stop
Depart: Wed Sep 20 2017 Return: Mon Sep 25 2017 Trip spans 6 days
Aeromexico
Aeromexico
IAD
9:17p
SJO
8:50a
11h 33m
1 stop
SJO
7:50a
IAD
5:58p
10h 08m
1 stop
Depart: Thu May 25 2017 Return: Thu Jun 1 2017 Trip spans 8 days
Avianca
Avianca
IAD
12:15p
SJO
7:45p
7h 30m
1 stop
SJO
1:47a
IAD
8:16a
6h 29m
1 stop
Depart: Sat May 20 2017 Return: Wed May 24 2017 Trip spans 5 days
Major Airline
Major Airline
IAD
2:21a
SJO
4:21p
14h 00m
1 stop
SJO
6:31a
IAD
2:55p
8h 24m
1 stop
Depart: Sun Sep 17 2017 Return: Sat Sep 23 2017 Trip spans 7 days
Delta
Delta
IAD
3:00p
LIR
10:03a
19h 03m
1 stop
LIR
9:10a
IAD
4:44p
7h 34m
1 stop
Depart: Mon Aug 21 2017 Return: Sun Aug 27 2017 Trip spans 7 days
Major Airline
Major Airline
IAD
2:21a
SJO
3:51p
13h 30m
1 stop
SJO
10:02p
IAD
5:10a
7h 08m
1 stop
Depart: Tue Aug 29 2017 Return: Wed Sep 6 2017 Trip spans 9 days
Major Airline
Major Airline
IAD
8:15a
SJO
3:58a
19h 43m
1 stop
SJO
4:20a
IAD
11:10a
6h 50m
1 stop
Depart: Sun May 28 2017 Return: Wed Jun 7 2017 Trip spans 11 days
JetBlue
JetBlue
DCA
2:00a
SJO
9:32a
7h 32m
1 stop
SJO
8:28a
DCA
3:59p
7h 31m
1 stop
Depart: Fri Oct 6 2017 Return: Thu Oct 12 2017 Trip spans 7 days
Copa Airlines
Copa Airlines
IAD
12:29p
SJO
7:51p
7h 22m
1 stop
SJO
10:31a
IAD
6:55p
8h 24m
1 stop
Depart: Wed May 3 2017 Return: Thu May 4 2017 Trip spans 2 days
American Airlines
American Airlines
DCA
4:55a
SJO
11:42a
6h 47m
1 stop
SJO
10:35a
DCA
5:38p
7h 03m
1 stop
Depart: Wed Oct 25 2017 Return: Tue Oct 31 2017 Trip spans 7 days
JetBlue
JetBlue
DCA
2:00a
SJO
9:28a
7h 28m
1 stop
SJO
8:06a
DCA
4:53p
8h 47m
1 stop
Depart: Fri Jun 2 2017 Return: Wed Jun 7 2017 Trip spans 6 days
Major Airline
Major Airline
IAD
2:06a
SJO
10:01a
7h 55m
1 stop
SJO
12:23a
IAD
2:59p
14h 36m
1 stop
Depart: Sun Oct 29 2017 Return: Thu Nov 2 2017 Trip spans 5 days
United
United
DCA
1:45a
LIR
9:30a
7h 45m
1 stop
LIR
8:35a
DCA
5:10p
8h 35m
1 stop
Depart: Sat Oct 14 2017 Return: Mon Oct 16 2017 Trip spans 3 days
Copa Airlines
Copa Airlines
IAD
6:21a
SJO
8:21p
14h 00m
1 stop
SJO
10:31a
IAD
6:55p
8h 24m
1 stop
Depart: Tue May 30 2017 Return: Thu Jun 8 2017 Trip spans 10 days
American Airlines
American Airlines
DCA
2:57p
SJO
7:44a
16h 47m
1 stop
SJO
10:35a
DCA
1:59a
15h 24m
1 stop
Depart: Tue Oct 31 2017 Return: Mon Nov 6 2017 Trip spans 7 days
Aeromexico
Aeromexico
IAD
10:12p
SJO
9:50a
11h 38m
1 stop
SJO
7:50a
IAD
5:54p
10h 04m
1 stop
* 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.

If you have more questions or if you have a bad price to report to us,
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Airports
Origin

Washington
only $261
only $364
Destination

Liberia
$415
San Jose
$261