Find Deals on Flights from Ontario 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
Students
under 26
The price shown for each flight will be the average for all passengers including any infants.
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Book cheap flights from Ontario to Costa Rica

(Round-trip)
Depart: Sat Feb 25 2017 Return: Sat Mar 4 2017 Trip spans 8 days
Aeromexico
Aeromexico
ONT
7:51p
SJO
5:47p
21h 56m
2 stops
SJO
1:08a
ONT
8:22p
19h 14m
2 stops
Depart: Wed Mar 1 2017 Return: Tue Mar 14 2017 Trip spans 13 days
Alaska Airlines
Alaska Airlines
ONT
1:15p
LIR
8:58a
19h 43m
2 stops
LIR
12:10p
ONT
6:54a
18h 44m
2 stops
Depart: Tue May 30 2017 Return: Fri Jun 16 2017 Trip spans 18 days
Volaris
Volaris
ONT
8:45p
SJO
6:19a
9h 34m
1 stop
SJO
8:04a
ONT
8:14p
12h 10m
1 stop
Depart: Mon Mar 27 2017 Return: Wed Mar 29 2017 Trip spans 3 days
United
United
ONT
8:30a
LIR
7:00a
22h 30m
2 stops
LIR
2:50a
ONT
5:14p
14h 24m
2 stops
Depart: Sun Feb 26 2017 Return: Thu Mar 2 2017 Trip spans 5 days
Aeromexico
Aeromexico
ONT
7:51p
SJO
5:47p
21h 56m
2 stops
SJO
1:08a
ONT
8:22p
19h 14m
2 stops
Depart: Sat Mar 4 2017 Return: Tue Mar 14 2017 Trip spans 10 days
Alaska Airlines
Alaska Airlines
ONT
1:15p
LIR
8:58a
19h 43m
2 stops
LIR
12:10p
ONT
6:54a
18h 44m
2 stops
Depart: Wed Mar 29 2017 Return: Wed Apr 5 2017 Trip spans 8 days
Volaris
Volaris
ONT
9:40p
SJO
7:05a
9h 25m
1 stop
SJO
8:04a
ONT
8:30p
12h 26m
1 stop
Depart: Fri Feb 3 2017 Return: Mon Feb 6 2017 Trip spans 4 days
$1066
Select
American Airlines
American Airlines
ONT
1:09a
SJO
12:04p
10h 55m
1 stop
SJO
2:50a
ONT
3:12p
12h 22m
1 stop
Depart: Wed Jun 21 2017 Return: Thu Jun 29 2017 Trip spans 9 days
$1136
Select
Delta
Delta
ONT
2:00a
SJO
2:40p
12h 40m
2 stops
SJO
3:20a
ONT
7:44p
16h 24m
2 stops
Depart: Mon Mar 13 2017 Return: Tue Mar 21 2017 Trip spans 9 days
Alaska Airlines
Alaska Airlines
ONT
1:30p
LIR
10:08a
20h 38m
2 stops
LIR
12:10p
ONT
6:52a
18h 42m
2 stops
Depart: Sat Apr 29 2017 Return: Sun May 7 2017 Trip spans 9 days
Volaris
Volaris
ONT
8:45p
SJO
6:19a
9h 34m
1 stop
SJO
8:04a
ONT
8:30p
12h 26m
1 stop
Depart: Sat Mar 18 2017 Return: Sun Mar 26 2017 Trip spans 9 days
Aeromexico
Aeromexico
ONT
8:52p
SJO
6:37a
33h 45m
2 stops
SJO
2:08a
ONT
8:22p
18h 14m
2 stops
Depart: Wed Mar 15 2017 Return: Tue Mar 21 2017 Trip spans 7 days
Alaska Airlines
Alaska Airlines
ONT
7:45a
LIR
10:08a
26h 23m
2 stops
LIR
12:10p
ONT
6:52a
18h 42m
2 stops
Depart: Sun Mar 19 2017 Return: Thu Mar 30 2017 Trip spans 12 days
Aeromexico
Aeromexico
ONT
8:52p
SJO
7:47p
22h 55m
2 stops
SJO
8:37a
ONT
8:22p
11h 45m
2 stops
Depart: Sun Apr 23 2017 Return: Wed May 24 2017 Trip spans 32 days
Volaris
Volaris
ONT
8:45p
SJO
6:19a
9h 34m
1 stop
SJO
8:04a
ONT
8:30p
12h 26m
1 stop
Depart: Fri Feb 10 2017 Return: Tue Feb 14 2017 Trip spans 5 days
United
United
ONT
3:10p
SJO
5:45a
14h 35m
2 stops
SJO
2:00a
ONT
5:48p
15h 48m
2 stops
Depart: Wed Mar 8 2017 Return: Tue Mar 14 2017 Trip spans 6 days
Alaska Airlines
Alaska Airlines
ONT
4:25a
LIR
8:58a
28h 33m
2 stops
LIR
12:10p
ONT
1:31p
25h 21m
2 stops
Depart: Thu Mar 23 2017 Return: Fri Mar 31 2017 Trip spans 9 days
Aeromexico
Aeromexico
ONT
8:52p
SJO
6:37a
9h 45m
2 stops
SJO
8:37a
ONT
8:45p
36h 08m
2 stops
Depart: Tue Mar 28 2017 Return: Thu Mar 30 2017 Trip spans 3 days
United
United
ONT
4:10p
LIR
7:00a
14h 50m
2 stops
LIR
2:50a
ONT
5:33p
14h 43m
2 stops
Depart: Wed Feb 8 2017 Return: Sun Feb 12 2017 Trip spans 5 days
Volaris
Volaris
ONT
7:40p
SJO
5:05a
9h 25m
1 stop
SJO
8:25a
ONT
8:00p
11h 35m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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

Ontario
$467
Destination

Liberia
$522
San Jose
$467