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Cheap flights from Ontario to Costa Rica from $177

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 5/13. 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
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.
American Airlines Logo
11:58 pm - 2:53 pm
ONT
-
SJO
12h 55m
1 stop
American Airlines Logo
11:35 pm - 10:06 am
SJO
-
ONT
11h 31m
1 stop
$393American Airlines
Mon, Mar 2 - Tue, Mar 10
American Airlines Logo
11:58 pm - 8:12 pm
ONT
-
SJO
18h 14m
2 stops
American Airlines Logo
3:59 pm - 11:28 am
SJO
-
ONT
21h 29m
2 stops
$398American Airlines
Tue, Feb 17 - Tue, Feb 24
American Airlines Logo
11:59 pm - 1:22 pm
ONT
-
SJO
12h 23m
1 stop
American Airlines Logo
2:08 pm - 8:39 am
SJO
-
ONT
19h 31m
2 stops
$409American Airlines
Fri, May 8 - Tue, May 12
Avianca Logo
10:30 pm - 11:25 am
ONT
-
SJO
10h 55m
1 stop
Avianca Logo
9:35 am - 9:55 pm
SJO
-
ONT
13h 20m
1 stop
$441Avianca
Thu, Mar 5 - Thu, Mar 12
Avianca Logo
10:30 pm - 1:40 pm
ONT
-
SJO
13h 10m
1 stop
Avianca Logo
3:05 pm - 8:55 pm
SJO
-
ONT
7h 50m
1 stop
$447Avianca
Tue, Feb 17 - Tue, Feb 24
United Airlines Logo
6:00 am - 8:39 pm
ONT
-
SJO
12h 39m
1 stop
United Airlines Logo
9:40 am - 10:57 pm
SJO
-
ONT
14h 17m
1 stop
$453United Airlines
Sun, Feb 22 - Sun, Mar 8
Alaska Airlines Logo
7:00 am - 6:38 am
ONT
-
LIR
21h 38m
2 stops
Alaska Airlines Logo
4:47 pm - 11:52 pm
LIR
-
ONT
32h 05m
2 stops
$553Alaska Airlines
Sat, Mar 7 - Sat, Mar 14
JetBlue Logo
11:25 pm - 12:15 pm
ONT
-
LIR
11h 50m
1 stop
JetBlue Logo
1:45 pm - 10:09 pm
LIR
-
ONT
33h 24m
1 stop
$629JetBlue
Sun, May 31 - Wed, Jun 3
Alaska Airlines Logo
7:00 am - 6:45 am
ONT
-
LIR
21h 45m
3 stops
Alaska Airlines Logo
7:08 pm - 3:08 pm
LIR
-
ONT
22h 00m
3 stops
$651Alaska Airlines
Mon, Feb 23 - Mon, Mar 2
JetBlue Logo
11:25 pm - 12:15 pm
ONT
-
LIR
11h 50m
1 stop
JetBlue Logo
1:45 pm - 10:09 pm
LIR
-
ONT
33h 24m
1 stop
$661JetBlue
Sat, May 30 - Wed, Jun 3

GOL flights from Ontario to Costa Rica

Our best GOL deals on Ontario to Costa Rica flight tickets
GOL
Mar 3
ONT2:39 pmOntario
21h 11m
2 stops
SJO1:50 pmSan José Juan Santamaria Intl
Mar 7
SJO3:59 pmSan José Juan Santamaria Intl
19h 07m
2 stops
ONT9:06 amOntario
$491
GOL
Mar 2
ONT11:58 pmOntario
12h 55m
1 stop
SJO2:53 pmSan José Juan Santamaria Intl
Mar 8
SJO11:35 pmSan José Juan Santamaria Intl
20h 07m
1 stop
ONT6:42 pmOntario
$501
GOL
Mar 30
ONT11:58 pmOntario
12h 57m
1 stop
SJO1:55 pmSan José Juan Santamaria Intl
Apr 14
SJO2:22 pmSan José Juan Santamaria Intl
23h 56m
2 stops
ONT1:18 pmOntario
$504

American Airlines flights from Ontario to Costa Rica

Our best American Airlines deals on Ontario to Costa Rica flight tickets
American Airlines
Mar 2
ONT11:58 pmOntario
12h 55m
1 stop
SJO2:53 pmSan José Juan Santamaria Intl
Mar 10
SJO11:35 pmSan José Juan Santamaria Intl
11h 31m
1 stop
ONT10:06 amOntario
$393
American Airlines
Feb 17
ONT11:58 pmOntario
18h 14m
2 stops
SJO8:12 pmSan José Juan Santamaria Intl
Feb 24
SJO3:59 pmSan José Juan Santamaria Intl
21h 29m
2 stops
ONT11:28 amOntario
$398
American Airlines
May 8
ONT11:59 pmOntario
12h 23m
1 stop
SJO1:22 pmSan José Juan Santamaria Intl
May 12
SJO2:08 pmSan José Juan Santamaria Intl
19h 31m
2 stops
ONT8:39 amOntario
$409

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 January 29, 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

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Mon 3/2

11:58 pm-2:53 pm

1 stop12h 55m

San José Juan Santamaria Intl

Tue 3/10

11:35 pm-10:06 am

1 stop11h 31m

$393

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 2/17

11:58 pm-8:12 pm

2 stops18h 14m

San José Juan Santamaria Intl

Tue 2/24

3:59 pm-11:28 am

2 stops21h 29m

$398

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Fri 5/8

11:59 pm-1:22 pm

1 stop12h 23m

San José Juan Santamaria Intl

Tue 5/12

2:08 pm-8:39 am

2 stops19h 31m

$409

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 3/5

10:30 pm-11:25 am

1 stop10h 55m

San José Juan Santamaria Intl

Thu 3/12

9:35 am-9:55 pm

1 stop13h 20m

$441

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 2/17

10:30 pm-1:40 pm

1 stop13h 10m

San José Juan Santamaria Intl

Tue 2/24

3:05 pm-8:55 pm

1 stop7h 50m

$447

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sun 2/22

6:00 am-8:39 pm

1 stop12h 39m

San José Juan Santamaria Intl

Sun 3/8

9:40 am-10:57 pm

1 stop14h 17m

$453

OntarioLiberia

ONT - LIR

ONTLIR

Ontario

Sat 3/7

7:00 am-6:38 am

2 stops21h 38m

Liberia

Sat 3/14

4:47 pm-11:52 pm

2 stops32h 05m

$553

OntarioLiberia

ONT - LIR

ONTLIR

Ontario

Sun 5/31

11:25 pm-12:15 pm

1 stop11h 50m

Liberia

Wed 6/3

1:45 pm-10:09 pm

1 stop33h 24m

$629

OntarioLiberia

ONT - LIR

ONTLIR

Ontario

Mon 2/23

7:00 am-6:45 am

3 stops21h 45m

Liberia

Mon 3/2

7:08 pm-3:08 pm

3 stops22h 00m

$651

OntarioLiberia

ONT - LIR

ONTLIR

Ontario

Sat 5/30

11:25 pm-12:15 pm

1 stop11h 50m

Liberia

Wed 6/3

1:45 pm-10:09 pm

1 stop33h 24m

$661

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 3% 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 18m

Direct flights

None
The fastest flight from Ontario to Costa Rica takes 7h 18m
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 $280Free CancellationRating
6.6
2,493 reviews
Search Avianca flights
United AirlinesPriceFrom $349Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
American AirlinesPriceFrom $366Free CancellationRating
7.2
11,207 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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