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Cheap flights from Ontario to Costa Rica from $190

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Costa Rica departing on 5/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Ontario to Costa Rica

Cheap round-trip flights

Enter your travel dates to find the best prices.
Avianca Logo
11:35 pm - 8:45 am
ONT
-
SJO
8h 10m
1 stop
Avianca Logo
3:10 pm - 9:45 pm
SJO
-
ONT
7h 35m
1 stop
$444Avianca
Sat, Apr 18 - Sat, Apr 25
Avianca Logo
11:35 pm - 11:30 am
ONT
-
SJO
10h 55m
1 stop
Avianca Logo
3:10 pm - 9:45 pm
SJO
-
ONT
7h 35m
1 stop
$445Avianca
Sat, Apr 18 - Tue, Apr 21
Avianca Logo
11:35 pm - 8:45 am
ONT
-
SJO
8h 10m
1 stop
Avianca Logo
3:10 pm - 9:45 pm
SJO
-
ONT
7h 35m
1 stop
$452Avianca
Tue, May 5 - Tue, May 12
American Airlines Logo
6:00 am - 9:36 pm
ONT
-
SJO
14h 36m
1 stop
American Airlines Logo
2:08 pm - 10:36 pm
SJO
-
ONT
9h 28m
1 stop
$454American Airlines
Fri, May 8 - Tue, May 12
Avianca Logo
11:35 pm - 8:45 am
ONT
-
SJO
8h 10m
1 stop
Avianca Logo
9:40 am - 9:45 pm
SJO
-
ONT
13h 05m
1 stop
$456Avianca
Thu, Apr 9 - Thu, Apr 16
Avianca Logo
11:35 pm - 8:45 am
ONT
-
SJO
8h 10m
1 stop
Avianca Logo
3:10 pm - 9:45 pm
SJO
-
ONT
7h 35m
1 stop
$457Avianca
Thu, May 14 - Thu, May 21
American Airlines Logo
6:00 am - 9:36 pm
ONT
-
SJO
14h 36m
1 stop
American Airlines Logo
2:31 pm - 8:39 am
SJO
-
ONT
19h 08m
2 stops
$459American Airlines
Fri, May 8 - Tue, May 12
Southwest Logo
9:55 pm - 11:00 am
ONT
-
LIR
12h 05m
1 stop
Southwest Logo
2:10 pm - 11:05 pm
LIR
-
ONT
9h 55m
2 stops
$514Southwest
Fri, May 15 - Fri, May 22
JetBlue Logo
10:00 pm - 12:40 pm
ONT
-
LIR
13h 40m
1 stop
JetBlue Logo
2:00 pm - 8:45 pm
LIR
-
ONT
31h 45m
1 stop
$539JetBlue
Sun, May 24 - Mon, Jun 1
JetBlue Logo
11:59 pm - 12:40 pm
ONT
-
LIR
11h 41m
1 stop
JetBlue Logo
2:00 pm - 10:40 pm
LIR
-
ONT
33h 40m
1 stop
$548JetBlue
Tue, Jun 16 - Tue, Jun 23

American Airlines flights from Ontario to Costa Rica

Our best American Airlines deals on Ontario to Costa Rica flight tickets
American Airlines
May 8
ONT6:00 amOntario
14h 36m
1 stop
SJO9:36 pmSan José Juan Santamaria Intl
May 12
SJO2:08 pmSan José Juan Santamaria Intl
9h 32m
1 stop
ONT10:40 pmOntario
$454
American Airlines
May 8
ONT7:30 amOntario
13h 06m
1 stop
SJO9:36 pmSan José Juan Santamaria Intl
May 12
SJO12:35 pmSan José Juan Santamaria Intl
21h 04m
2 stops
ONT8:39 amOntario
$459
American Airlines
May 29
ONT10:22 amOntario
11h 20m
1 stop
SJO10:42 pmSan José Juan Santamaria Intl
Jun 7
SJO11:59 pmSan José Juan Santamaria Intl
19h 23m
2 stops
ONT6:22 pmOntario
$464

United Airlines flights from Ontario to Costa Rica

Our best United Airlines deals on Ontario to Costa Rica flight tickets
United Airlines
May 2
ONT10:43 amOntario
19h 32m
1 stop
SJO7:15 amSan José Juan Santamaria Intl
May 9
SJO7:55 amSan José Juan Santamaria Intl
15h 03m
1 stop
ONT9:58 pmOntario
$474
United Airlines
Apr 23
ONT6:49 pmOntario
14h 22m
2 stops
SJO10:11 amSan José Juan Santamaria Intl
Apr 25
SJO11:13 amSan José Juan Santamaria Intl
11h 37m
1 stop
ONT9:50 pmOntario
$506
United Airlines
Apr 11
ONT6:49 pmOntario
14h 22m
2 stops
SJO10:11 amSan José Juan Santamaria Intl
Apr 25
SJO1:25 pmSan José Juan Santamaria Intl
9h 25m
1 stop
ONT9:50 pmOntario
$531

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Costa Rica that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 22, 2026.
Use the filters below to find and compare flights from Ontario to Costa Rica that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 4/18

11:35 pm-8:45 am

1 stop8h 10m

San José Juan Santamaria Intl

Sat 4/25

3:10 pm-9:45 pm

1 stop7h 35m

$444

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 4/18

11:35 pm-11:30 am

1 stop10h 55m

San José Juan Santamaria Intl

Tue 4/21

3:10 pm-9:45 pm

1 stop7h 35m

$445

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 5/5

11:35 pm-8:45 am

1 stop8h 10m

San José Juan Santamaria Intl

Tue 5/12

3:10 pm-9:45 pm

1 stop7h 35m

$452

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Fri 5/8

6:00 am-9:36 pm

1 stop14h 36m

San José Juan Santamaria Intl

Tue 5/12

2:08 pm-10:36 pm

1 stop9h 28m

$454

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 4/9

11:35 pm-8:45 am

1 stop8h 10m

San José Juan Santamaria Intl

Thu 4/16

9:40 am-9:45 pm

1 stop13h 05m

$456

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 5/14

11:35 pm-8:45 am

1 stop8h 10m

San José Juan Santamaria Intl

Thu 5/21

3:10 pm-9:45 pm

1 stop7h 35m

$457

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Fri 5/8

6:00 am-9:36 pm

1 stop14h 36m

San José Juan Santamaria Intl

Tue 5/12

2:31 pm-8:39 am

2 stops19h 08m

$459

OntarioLiberia

ONT - LIR

ONTLIR

Ontario

Fri 5/15

9:55 pm-11:00 am

1 stop12h 05m

Liberia

Fri 5/22

2:10 pm-11:05 pm

2 stops9h 55m

$514

OntarioLiberia

ONT - LIR

ONTLIR

Ontario

Sun 5/24

10:00 pm-12:40 pm

1 stop13h 40m

Liberia

Mon 6/1

2:00 pm-8:45 pm

1 stop31h 45m

$539

OntarioLiberia

ONT - LIR

ONTLIR

Ontario

Tue 6/16

11:59 pm-12:40 pm

1 stop11h 41m

Liberia

Tue 6/23

2:00 pm-10:40 pm

1 stop33h 40m

$548

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Costa Rica from

How to get the cheapest flight ticket from Ontario to Costa Rica

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Costa Rica?

The cheapest month to fly to Costa Rica from Ontario is in October. Flight prices, which tend to average around $371, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in October, then September is your next best option. Flight prices from Ontario to Costa Rica during September average around $390.

Can stopping save me money on Ontario to Costa Rica flights?

You could potentially save up to 18% on your flight if you consider stops on a Ontario to Costa Rica flight.

Cheap Ontario to Costa Rica flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Costa Rica

Fastest flight time

7h 20m

Direct flights

None
The fastest flight from Ontario to Costa Rica takes 7h 20m
There are no direct flights from Ontario to Costa Rica. There are no popular flight routes from Ontario to Costa Rica.
Search flight deals

  • When did momondo last update prices for flights from Ontario Airport to Costa Rica?

    Prices for flights from Ontario Airport to Costa Rica were last updated today.

  • How many operators does momondo search for flights from Ontario Airport to Costa Rica?

  • How old do you have to be to fly from Ontario Airport to Costa Rica?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Costa Rica.

  • What documentation or ID do you need to fly to Costa Rica?

    The travel and health documents required for your trip to Costa Rica can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Costa Rica. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Ontario to Costa Rica

Compare and see reviews for airlines that fly from Ontario to Costa Rica with momondo
Airline
Rating
Free Cancellation
Price
AviancaPriceFrom $215Free CancellationRating
6.5
2,505 reviews
Search Avianca flights
United AirlinesPriceFrom $349Free CancellationRating
7.4
9,455 reviews
Search United Airlines flights
American AirlinesPriceFrom $366Free CancellationRating
7.1
11,487 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Costa Rica?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Costa Rica. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to Costa Rica with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to Costa Rica flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to Costa Rica?

momondo provides multiple filters to help you find the best flight to Costa Rica from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to Costa Rica right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Costa Rica flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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