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Ontario

$131+ Cheap flights from Costa Rica to Ontario (ONT)

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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — ONT
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
1 adult, Economy
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Cheap flight deals from Costa Rica to Ontario

Keep the following information in mind while searching for Costa Rica to Ontario flight deals. Data was last updated April 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$217
(United Airlines)

One-way from

$131
(United Airlines)

Popular in

June

Cheapest in

September

Average price

$419
Provider with most accurate pricing for San José Juan Santamaria Intl-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for San José Juan Santamaria Intl-Los Angeles flights.
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From Costa Rica to Ontario
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One-way flight from Costa Rica to Ontario
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Highest demand for flights based on searches. 8% potential increase in price ($37 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Costa Rica to Ontario

Cheapest flights from Costa Rica to Ontario
Explore the most affordable flight options available from Costa Rica to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 2, 2025.

This United Airlines deal was found by Cheapflights users on 3/31. 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.
Tue 4/111:13 amSJO - ONT
2 stops26h 25mUnited Airlines
Tue 4/86:00 amONT - SJO
2 stops27h 11mUnited Airlines
Deal found 3/31$213
This CheapOair deal was found by Cheapflights users on 3/31. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/143:31 pmSJO - ONT
1 stop8h 42mMultiple Airlines
Mon 6/231:09 amONT - SJO
1 stop21h 05mMultiple Airlines
Deal found 3/31$318
This United Airlines deal was found by Cheapflights users on 3/30. 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.
Tue 4/1511:49 amLIR - ONT
1 stop9h 53mUnited Airlines
Wed 4/306:10 amONT - LIR
1 stop7h 13mUnited Airlines
Deal found 3/30$445
This Priceline deal was found by Cheapflights users on 3/31. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/213:05 pmSJO - ONT
1 stop7h 50mAvianca
Sat 8/3011:25 pmONT - SJO
1 stop10h 50mAvianca
Deal found 3/31$483
This American Airlines deal was found by Cheapflights users on 3/31. 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.
Mon 9/2212:50 pmSJO - ONT
2 stops23h 32mAmerican Airlines
Tue 9/305:09 pmONT - SJO
2 stops15h 16mAmerican Airlines
Deal found 3/31$489
This Delta deal was found by Cheapflights users on 3/31. 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.
Sat 11/157:00 amSJO - ONT
1 stop14h 42mDelta
Sat 12/610:59 pmONT - SJO
1 stop11h 53mDelta
Deal found 3/31$543
This American Airlines deal was found by Cheapflights users on 4/1. 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.
Tue 5/202:05 pmLIR - ONT
1 stop10h 38mAmerican Airlines
Mon 6/910:28 pmONT - LIR
1 stop11h 56mAmerican Airlines
Deal found 4/1$559
This Delta deal was found by Cheapflights users on 4/1. 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.
Sat 5/241:05 pmLIR - ONT
1 stop11h 03mDelta
Mon 6/95:45 pmONT - LIR
2 stops17h 15mDelta
Deal found 4/1$1,562

Cheapflights Fare Finder

Customize your flight search to find flights from Costa Rica to Ontario 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 April 2, 2025.
Use the filters below to find and compare flights from Costa Rica to Ontario that are best for you.

Fly from

Costa Rica

Fly to

Ontario

Route

Depart

Return

Price

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 5/21

7:55 am-10:00 pm

1 stop15h 05m

Ontario

Tue 5/27

6:00 am-7:15 am

1 stop24h 15m

$215

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sat 6/14

3:31 pm-11:13 pm

1 stop8h 42m

Ontario

Mon 6/23

1:09 am-11:14 pm

1 stop21h 05m

$318

LiberiaOntario

LIR - ONT

LIRONT

Liberia

Tue 4/15

11:49 am-8:42 pm

1 stop9h 53m

Ontario

Wed 4/30

6:10 am-2:23 pm

1 stop7h 13m

$445

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 8/21

3:05 pm-9:55 pm

1 stop7h 50m

Ontario

Sat 8/30

11:25 pm-11:15 am

1 stop10h 50m

$483

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Mon 9/22

12:50 pm-11:22 am

2 stops23h 32m

Ontario

Tue 9/30

5:09 pm-9:25 am

2 stops15h 16m

$489

LiberiaOntario

LIR - ONT

LIRONT

Liberia

Tue 5/20

2:05 pm-11:43 pm

1 stop10h 38m

Ontario

Mon 6/9

10:28 pm-11:24 am

1 stop11h 56m

$559

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Mon 4/14

7:00 am-7:28 pm

1 stop13h 28m

Ontario

Mon 4/28

5:30 pm-11:55 am

2 stops17h 25m

$560

LiberiaOntario

LIR - ONT

LIRONT

Liberia

Sat 5/24

1:05 pm-11:08 pm

1 stop11h 03m

Ontario

Mon 6/9

5:45 pm-12:00 pm

2 stops17h 15m

$1,562

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 5/21

7:55 am-10:00 pm

1 stop15h 05m

$131

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sat 5/17

3:31 pm-11:13 pm

1 stop8h 42m

$159

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 17 results
1
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Best time to book a flight from Costa Rica to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Costa Rica 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.

Cheapflights Insights

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

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

Currently, August is the cheapest month in which you can book a flight from Costa Rica to Ontario (average of $246). Flying from Costa Rica to Ontario in March is currently the most expensive (average of $328). 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 CR to ONT?

Find hourly flight availability from Costa Rica to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 2, 2025.

When flying from Costa Rica to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated April 2, 2025.
To help decide which airline to fly from Costa Rica to Ontario, see what other customers have to say about Alaska Airlines, Delta and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,820 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Alaska Airlines
8.0
Very good
9,820 reviews
Alaska Airlines
8.0
Very good
9,820 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Delta
8.0
Very good
7,898 reviews
Alaska Airlines
8.0
Very good
9,820 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
United Airlines
7.4
Good
8,615 reviews
Alaska Airlines
8.0
Very good
9,820 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,820 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
WestJet
7.2
Good
2,789 reviews
Alaska Airlines
8.0
Very good
9,820 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

Related info for your journey

Find useful and relevant information for your journey from Costa Rica to Ontario. 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 into for flights to Ontario from Costa Rica?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Ontario from Costa Rica.

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

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $131. However, be on the lookout for offers from American Airlines and Avianca, as they are both options that can get you from Costa Rica to Ontario for a low price.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Costa Rica to Ontario 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 Costa Rica to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Costa Rica to Ontario (average of $246). Flying from Costa Rica to Ontario in March is currently the most expensive (average of $328). 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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Alternative routes for Costa Rica to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Costa Rica to Ontario

Discover the top 2 airlines that operate flights from Costa Rica to Ontario. 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 April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$328Average$465FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$408Average$614FlexibilityNo cancel feeOn-time71%

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