$225 Find Cheap Flights from Ontario to Costa Rica - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Costa Rica departing on 8/24. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Ontario to Costa Rica

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
San José
San José2 stops$502
Liberia
Liberia2 stops$599
San José
San José2 stops$502
Liberia
Liberia2 stops$599

Book Cheap Ontario to Costa Rica Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Costa Rica that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Costa Rica

Mon, Nov 30 - Fri, Dec 11
Southwest Logo
6:30 pm - 12:20 pm
ONT
-
SJO
15h 50m
2 stops
Southwest Logo
1:20 pm - 8:50 am
SJO
-
ONT
21h 30m
2 stops
$502Southwest
Thu, Aug 13 - Thu, Aug 20
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
$509Avianca
Tue, Sep 15 - Tue, Sep 22
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
$509Avianca
Tue, Sep 8 - Tue, Sep 29
Avianca Logo
11:35 pm - 11:30 am
ONT
-
SJO
10h 55m
1 stop
Avianca Logo
9:40 am - 9:45 pm
SJO
-
ONT
13h 05m
1 stop
$509Avianca
Sat, Sep 12 - Tue, Sep 22
Southwest Logo
7:05 am - 6:05 pm
ONT
-
SJO
10h 00m
2 stops
Southwest Logo
1:40 pm - 10:05 pm
SJO
-
ONT
9h 25m
1 stop
$528Southwest
Tue, Aug 18 - Wed, Sep 16
Southwest Logo
5:45 am - 6:40 pm
ONT
-
SJO
11h 55m
2 stops
Southwest Logo
1:40 pm - 10:05 pm
SJO
-
ONT
9h 25m
1 stop
$549Southwest
Fri, Sep 18 - Fri, Sep 25
American Airlines Logo
2:22 pm - 11:59 am
ONT
-
SJO
20h 37m
2 stops
American Airlines Logo
2:57 pm - 11:47 am
SJO
-
ONT
21h 50m
2 stops
$585American Airlines
Tue, Aug 18 - Wed, Sep 16
American Airlines Logo
12:59 pm - 12:03 pm
ONT
-
SJO
22h 04m
2 stops
American Airlines Logo
2:57 pm - 9:29 am
SJO
-
ONT
19h 32m
2 stops
$585American Airlines
Thu, Sep 3 - Sun, Sep 6
United Airlines Logo
7:13 pm - 7:15 am
ONT
-
SJO
11h 02m
1 stop
United Airlines Logo
8:45 am - 8:01 pm
SJO
-
ONT
12h 16m
1 stop
$620United Airlines
Mon, Sep 21 - Sun, Sep 27
United Airlines Logo
6:00 am - 7:37 pm
ONT
-
SJO
12h 37m
1 stop
United Airlines Logo
8:45 am - 5:51 pm
SJO
-
ONT
10h 06m
1 stop
$630United Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Costa Rica flights

Get data-powered insights and trends into flights from Ontario to Costa Rica to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Ontario to Costa Rica?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Costa Rica, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Costa Rica is October, when tickets cost $371 (return) on average. On the other hand, the most expensive months are July and August, when the average cost of round-trip tickets is $760 and $618 respectively.

Find deals

Good to know

Low season

August

Cheapest flight

$225
Best time to beat the crowds but there is an average 17% increase in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from Ontario to San José

FAQs - booking Costa Rica flights

  • How does KAYAK find such low prices on flights from Ontario to Costa Rica?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Costa Rica.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Costa Rica?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to Costa Rica is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Costa Rica?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Ontario to Costa Rica with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Costa Rica?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Ontario to Costa Rica up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Ontario to Costa Rica

Information on your arrival and departure airports

Ontario (ONT)