Cheap flights from Ontario to Costa Rica from $272
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 1/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Not ready to book? to track prices.Avianca flights from Ontario to Costa Rica
Our best Avianca deals on Ontario to Costa Rica flight tickets
American Airlines flights from Ontario to Costa Rica
Our best American Airlines deals on Ontario to Costa Rica flight tickets
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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
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Thu 11/5
10:45 pm-8:50 am
1 stop8h 05m
San José Juan Santamaria Intl
Thu 11/12
3:10 pm-8:50 pm
1 stop7h 40m
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Tue 11/10
10:45 pm-8:50 am
1 stop8h 05m
San José Juan Santamaria Intl
Thu 11/12
3:10 pm-8:50 pm
1 stop7h 40m
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Thu 10/22
11:35 pm-8:45 am
1 stop8h 10m
San José Juan Santamaria Intl
Tue 11/17
9:45 am-8:50 pm
1 stop13h 05m
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Thu 1/14
7:00 am-7:54 pm
1 stop10h 54m
San José Juan Santamaria Intl
Fri 1/22
2:57 pm-11:13 pm
1 stop10h 16m
OntarioLiberia
ONT Ontario - LIR Liberia
ONTLIR
Ontario
Sun 12/6
11:59 pm-2:19 pm
2 stops12h 20m
Liberia
Sat 12/12
3:35 pm-1:24 pm
2 stops23h 49m
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Thu 1/14
6:20 am-7:54 pm
2 stops11h 34m
San José Juan Santamaria Intl
Fri 1/22
6:30 am-10:15 pm
2 stops17h 45m
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Wed 1/20
6:00 am-8:39 pm
1 stop12h 39m
San José Juan Santamaria Intl
Wed 2/3
9:40 am-5:35 pm
1 stop9h 55m
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Wed 3/3
12:05 am-10:44 pm
1 stop20h 39m
San José Juan Santamaria Intl
Thu 3/11
9:45 am-8:50 pm
1 stop13h 05m
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Fri 1/1
5:44 am-11:06 pm
1 stop15h 22m
San José Juan Santamaria Intl
Fri 1/15
2:57 pm-12:39 pm
2 stops23h 42m
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Fri 1/8
3:59 pm-8:32 am
1 stop14h 33m
San José Juan Santamaria Intl
Sat 2/6
2:25 pm-10:15 pm
1 stop9h 50m
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 December. Flight prices, which tend to average around $390, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in December, then November is your next best option. Flight prices from Ontario to Costa Rica during November average around $454.
Can stopping save me money on Ontario to Costa Rica flights?
You could potentially save up to 38% on your flight if you consider stops on a Ontario to Costa Rica flight.
What is the cheapest airline that flies from Ontario to Costa Rica?
Delta and United Airlines are the most popular carriers operating from Ontario to Costa Rica
What airlines fly to Costa Rica?
Alaska Airlines, United Airlines and Avianca are the top three most popular airlines that fly to Costa Rica from Ontario according to our data. Alaska Airlines is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Costa Rica. Keep in mind that there are 11 different airlines that fly to Costa Rica on a routine basis, so you have a few additional options to choose from.
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
Frequently asked questions about flying from Ontario to Costa Rica
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?
The number of operators available for flights from Ontario Airport to Costa Rica is 3 as of October 2026.
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 | ||
|---|---|---|---|---|---|
| PriceFrom $371 | Free Cancellation | Rating 7.4 10,349 reviews | |||
| PriceFrom $393 | Free Cancellation | Rating 7.0 12,155 reviews | |||
| PriceFrom $404 | Free Cancellation | Rating 6.5 2,553 reviews |
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.