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$168+ Cheap flights from Ontario (ONT) to Costa Rica

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJO
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Ontario to Costa Rica

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Costa Rica (CR0). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$374
(Booking.com)

One-way from

$168
(CheapOair)
From Ontario to Costa Rica
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One-way flight from Ontario to Costa Rica
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Find flight deals from Ontario to Costa Rica

Cheapest flights from Ontario to Costa Rica
Explore the most affordable flight options available from Ontario to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This Booking.com deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/2211:30 pmONT - SJO
1 stop13h 05mMultiple Airlines
Tue 4/13:31 pmSJO - ONT
1 stop8h 36mMultiple Airlines
Deal found 1/21$374
This Kissandfly.com deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/246:00 amONT - SJO
1 stop12h 39mLufthansa
Sat 2/16:30 amSJO - ONT
1 stop17h 27mLufthansa
Deal found 1/21$421
This Cheapflightsfares deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/1510:30 pmONT - SJO
1 stop10h 55mAvianca
Sat 2/229:35 amSJO - ONT
1 stop13h 25mAvianca
Deal found 1/21$440
This American Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1711:59 pmONT - SJO
1 stop20h 56mAmerican Airlines
Sat 5/242:30 pmSJO - ONT
2 stops20h 01mAmerican Airlines
Deal found 1/21$484
This United Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/16:00 amONT - LIR
1 stop9h 57mUnited Airlines
Tue 3/48:50 amLIR - ONT
1 stop15h 09mUnited Airlines
Deal found 1/21$527
This American Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/110:50 pmONT - LIR
2 stops11h 30mAmerican Airlines
Tue 3/41:20 pmLIR - ONT
2 stops22h 41mAmerican Airlines
Deal found 1/21$531
This Delta deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/710:59 pmONT - LIR
1 stop11h 48mDelta
Thu 9/181:12 pmLIR - ONT
1 stop10h 17mDelta
Deal found 1/21$541
This United Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/166:00 amONT - SJO
1 stop12h 39mUnited Airlines
Wed 3/512:35 pmSJO - ONT
1 stop11h 24mUnited Airlines
Deal found 1/21$560
This Delta deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:59 pmONT - SJO
1 stop11h 53mDelta
Wed 12/32:17 pmSJO - ONT
1 stop10h 12mDelta
Deal found 1/20$693
This Alaska Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/16:00 amONT - LIR
3 stops22h 40mAlaska Airlines
Tue 3/47:02 pmLIR - ONT
2 stops23h 57mAlaska Airlines
Deal found 1/21$705
This Air Canada deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/96:42 pmONT - LIR
2 stops17h 13mAir Canada
Sun 11/162:55 pmLIR - ONT
2 stops25h 46mAir Canada
Deal found 1/21$2,073
This Air Canada deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/166:00 amONT - LIR
2 stops30h 30mMultiple Airlines
Fri 2/213:30 pmLIR - ONT
2 stops29h 01mMultiple Airlines
Deal found 1/21$2,644

Find flights from Ontario to Costa Rica within your budget

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, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 3/22

11:30 pm-1:35 pm

1 stop13h 05m

San José Juan Santamaria Intl

Tue 4/1

3:31 pm-11:07 pm

1 stop8h 36m

$374

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 2/15

10:30 pm-11:25 am

1 stop10h 55m

San José Juan Santamaria Intl

Sat 2/22

9:35 am-9:00 pm

1 stop13h 25m

$440

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 5/17

11:59 pm-9:55 pm

1 stop20h 56m

San José Juan Santamaria Intl

Sat 5/24

2:30 pm-9:31 am

2 stops20h 01m

$484

OntarioLiberia

ONT - LIR

ONTLIR

Ontario

Sat 3/1

6:00 am-5:57 pm

1 stop9h 57m

Liberia

Tue 3/4

8:50 am-9:59 pm

1 stop15h 09m

$527

OntarioLiberia

ONT - LIR

ONTLIR

Ontario

Sat 3/1

10:50 pm-12:20 pm

2 stops11h 30m

Liberia

Tue 3/4

1:20 pm-10:01 am

2 stops22h 41m

$531

OntarioLiberia

ONT - LIR

ONTLIR

Ontario

Tue 5/6

10:59 pm-12:01 pm

1 stop12h 02m

Liberia

Wed 5/14

1:23 pm-10:41 pm

1 stop10h 18m

$541

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sun 2/16

6:00 am-8:39 pm

1 stop12h 39m

San José Juan Santamaria Intl

Wed 3/5

12:35 pm-9:59 pm

1 stop11h 24m

$560

OntarioLiberia

ONT - LIR

ONTLIR

Ontario

Sat 3/1

6:00 am-6:40 am

3 stops22h 40m

Liberia

Tue 3/4

7:02 pm-4:59 pm

2 stops23h 57m

$705

OntarioLiberia

ONT - LIR

ONTLIR

Ontario

Sun 2/16

6:00 am-2:30 pm

2 stops30h 30m

Liberia

Fri 2/21

3:30 pm-6:31 pm

2 stops29h 01m

$2,644

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Mon 2/24

12:58 am-11:12 pm

1 stop20h 14m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 20 results
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Best time to book a flight from Ontario to Costa Rica

Have a flexible travel schedule? Discover the best time to fly to Costa Rica from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Ontario to Costa Rica

Get recent, data-driven insights about flights from Ontario to Costa Rica including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Ontario to Costa Rica?

Currently, September is the cheapest month in which you can book a flight from Ontario to Costa Rica (average of $398). Flying from Ontario to Costa Rica in March is currently the most expensive (average of $555). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to CR?

Find hourly flight availability from Ontario to Costa Rica. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Costa Rica as you normally would.

Rainfall in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Costa Rica ranges from 0.0 - 11.8 inches per month. September is typically the wettest month, when rainfall can reach 11.8 in. February is typically the driest time to visit Costa Rica when rainfall is around 0.0 in.

Temperature in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Costa Rica, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 64.4 F).

Reviews of airlines servicing Costa Rica

Get insights into the airlines that provide service to Costa Rica. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Costa Rica. Reviews last updated January 21, 2025.
Read reviews from past customers who have flown Avianca, American Airlines and United Airlines from Ontario to Costa Rica. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,706 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines
8.0
Very good
9,706 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta
8.0
Very good
8,521 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

JetBlue
7.4
Good
3,200 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines
7.4
Good
8,984 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Ontario to Costa Rica. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Costa Rica?

    If you book a flight to Costa Rica from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • What are the cheapest airlines to fly from Ontario to Costa Rica one-way?

    To fly one-way, consider booking your trip with Avianca, which is currently one of the cheapest options available, starting at $202. American Airlines flights start at $234 while deals on United Airlines start at $261 one-way.

  • Can I find deals for flights from Ontario to Costa Rica that include hotel bookings?

    Yes. In addition to deals on Ontario to Costa Rica flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Costa Rica?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Costa Rica.

  • Can I find deals for business class flights from Ontario to Costa Rica?

    Yes. Cheapflights offers flight deals from Ontario to Costa Rica by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Costa Rica?

    Currently, September is the cheapest month in which you can book a flight from Ontario to Costa Rica (average of $398). Flying from Ontario to Costa Rica in March is currently the most expensive (average of $555). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Ontario to Costa Rica

Discover the top 3 airlines that operate flights from Ontario to Costa Rica. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$314Average$448FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$378Average$729FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$442Average$635FlexibilityNo cancel feeOn-time71%
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