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 $188. However, be on the lookout for offers from Avianca and American Airlines, as they are both options that can get you from Costa Rica to Ontario for a low price.

How far in advance should I book a flight from Costa Rica to Ontario?

To save on the cost of your flight from Costa Rica to Ontario, book at least 58 days before your planned departure. Booking around this time can save you about 15% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $431 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $446.

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

Our data shows that September tends to be the cheapest month to fly to Ontario from Costa Rica. Users have commonly found prices around $409 for the month, but tickets can be as low as $133. Due to multiple factors, prepare for potentially higher prices in June.

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.

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.

$469+ Flights from Costa Rica to Ontario

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Cheap flight deals from Costa Rica to Ontario

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$329 (United Airlines)
One-way from	$160 (CheapOair)
Popular in	June
Cheapest in	September
Average price	$424

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 ($40 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($8 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 24, 2025.

Tue 5/137:55 amSJO - ONT

1 stop15h 05mUnited Airlines

Wed 5/211:45 pmONT - SJO

2 stops28h 52mUnited Airlines

Deal found 4/23

$329

Tue 6/103:31 pmSJO - ONT

1 stop8h 42mMultiple Airlines

Mon 6/231:09 amONT - SJO

1 stop21h 05mMultiple Airlines

Deal found 4/23

$343

Thu 5/223:05 pmSJO - ONT

1 stop7h 50mAvianca

Tue 6/2411:25 pmONT - SJO

1 stop10h 50mAvianca

Deal found 4/23

$457

Thu 6/2611:49 amLIR - ONT

2 stops25h 25mUnited Airlines

Tue 7/16:39 pmONT - LIR

2 stops14h 21mUnited Airlines

Deal found 4/22

$481

Sat 11/157:00 amSJO - ONT

1 stop14h 42mDelta

Sat 12/610:59 pmONT - SJO

1 stop11h 53mDelta

Deal found 4/23

$543

Thu 11/138:05 amSJO - ONT

2 stops15h 36mAmerican Airlines

Wed 11/1911:59 pmONT - SJO

2 stops12h 31mAmerican Airlines

Deal found 4/23

$612

Tue 4/296:40 pmLIR - ONT

3 stops29h 33mMultiple Airlines

Sun 5/49:23 pmONT - LIR

3 stops17h 07mMultiple Airlines

Deal found 4/23

$1,091

Best flights from Costa Rica to Ontario
Discover carefully curated flight deals from Costa Rica to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2025.

Tue 5/137:55 amSJO - ONT

1 stop15h 05mUnited Airlines

Wed 5/211:45 pmONT - SJO

2 stops28h 52mUnited Airlines

Deal found 4/23

$329

Tue 6/103:31 pmSJO - ONT

1 stop8h 42mMultiple Airlines

Mon 6/231:09 amONT - SJO

1 stop21h 05mMultiple Airlines

Deal found 4/23

$343

Thu 5/223:05 pmSJO - ONT

1 stop7h 50mAvianca

Tue 6/2411:25 pmONT - SJO

1 stop10h 50mAvianca

Deal found 4/23

$457

Mon 5/51:50 pmSJO - ONT

1 stop10h 53mAmerican Airlines

Sun 5/1112:45 pmONT - SJO

1 stop8h 32mAmerican Airlines

Deal found 4/23

$676

Wed 7/21:25 pmSJO - ONT

2 stops34h 56mDelta

Tue 8/1210:59 pmONT - SJO

1 stop11h 49mDelta

Deal found 4/23

$823

Thu 6/2611:49 amLIR - ONT

2 stops25h 25mUnited Airlines

Tue 7/16:39 pmONT - LIR

2 stops14h 21mUnited Airlines

Deal found 4/22

$481

Last-minute flights from Costa Rica to Ontario
Discover last-minute flight deals from Costa Rica to Ontario. Data last updated April 24, 2025 and is based on user searches.

Tue 4/293:31 pmSJO - ONT

1 stop8h 42mMultiple Airlines

Fri 5/21:09 amONT - SJO

1 stop21h 05mMultiple Airlines

Deal found 4/23

$739

Tue 4/296:40 pmLIR - ONT

3 stops29h 33mMultiple Airlines

Sun 5/49:23 pmONT - LIR

3 stops17h 07mMultiple Airlines

Deal found 4/23

$1,091

Thu 5/11:20 pmLIR - ONT

2 stops24h 04mUnited Airlines

Wed 5/71:20 pmONT - LIR

1 stop25h 05mUnited Airlines

Deal found 4/23

$492

Thu 5/13:25 pmLIR - ONT

2 stops30h 09mUnited Airlines

Tue 5/64:15 pmONT - LIR

2 stops18h 55mUnited Airlines

Deal found 4/23

$492

Sat 5/36:35 amSJO - ONT

1 stop9h 41mUnited Airlines

Sun 5/44:15 pmONT - SJO

2 stops19h 11mUnited Airlines

Deal found 4/23

$329

Mon 5/51:50 pmSJO - ONT

1 stop10h 53mAmerican Airlines

Sun 5/1112:45 pmONT - SJO

1 stop8h 32mAmerican Airlines

Deal found 4/23

$676

Mon 5/121:24 pmSJO - ONT

1 stop22h 44mDelta

Tue 5/2012:18 pmONT - SJO

1 stop22h 41mDelta

Deal found 4/23

$1,268

Tue 5/137:55 amSJO - ONT

1 stop15h 05mUnited Airlines

Wed 5/211:45 pmONT - SJO

2 stops28h 52mUnited Airlines

Deal found 4/23

$329

Thu 5/223:05 pmSJO - ONT

1 stop7h 50mAvianca

Tue 6/2411:25 pmONT - SJO

1 stop10h 50mAvianca

Deal found 4/23

$457

Sat 5/313:31 pmSJO - ONT

1 stop8h 42mMultiple Airlines

Fri 6/61:09 amONT - SJO

1 stop21h 05mMultiple Airlines

Deal found 4/23

$443

One-way flights from Costa Rica to Ontario
Search for one-way flight options from Costa Rica to Ontario. Find affordable one-way fares based on user searches. Data last updated April 24, 2025.

Tue 5/133:31 pmSJO - ONT

1 stop8h 42mMultiple Airlines

Deal found 4/23

$160

Mon 5/127:55 amSJO - ONT

1 stop15h 05mUnited Airlines

Deal found 4/23

$188

Thu 5/83:05 pmSJO - ONT

1 stop7h 50mAvianca

Deal found 4/23

$249

Fri 6/2011:05 amLIR - ONT

1 stop11h 05mUnited Airlines

Deal found 4/24

$264

Fri 9/122:05 pmLIR - ONT

1 stop10h 31mAmerican Airlines

Deal found 4/23

$269

Tue 4/2911:59 pmSJO - ONT

1 stop23h 11mAmerican Airlines

Deal found 4/23

$283

Tue 5/2710:15 amLIR - ONT

3 stops33h 27mMultiple Airlines

Deal found 4/24

$303

Fri 9/1211:20 amLIR - ONT

3 stops24h 25mAlaska Airlines

Deal found 4/23

$325

Cheapflights Fare Finder

Use the filters below to find and compare flights from Costa Rica to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 5/13

7:55 am-10:00 pm

1 stop15h 05m

Ontario

Wed 5/21

1:45 pm-7:37 pm

2 stops28h 52m

$329

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 6/10

3:31 pm-11:13 pm

1 stop8h 42m

Ontario

Mon 6/23

1:09 am-11:14 pm

1 stop21h 05m

$343

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 5/22

3:05 pm-9:55 pm

1 stop7h 50m

Ontario

Tue 6/24

11:25 pm-11:15 am

1 stop10h 50m

$457

LiberiaOntario

LIR - ONT

LIRONT

Liberia

Thu 6/26

11:05 am-9:37 pm

1 stop11h 32m

Ontario

Tue 7/1

6:00 am-10:00 am

1 stop27h 00m

$481

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Mon 5/5

1:50 pm-11:43 pm

1 stop10h 53m

Ontario

Sun 5/11

12:45 pm-10:17 pm

1 stop8h 32m

$676

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 7/2

1:25 pm-11:21 pm

2 stops34h 56m

Ontario

Tue 8/12

10:59 pm-11:48 am

1 stop11h 49m

$823

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 5/13

3:31 pm-11:13 pm

1 stop8h 42m

$160

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Mon 5/12

7:55 am-10:00 pm

1 stop15h 05m

$188

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 5/8

3:05 pm-9:55 pm

1 stop7h 50m

$249

LiberiaOntario

LIR - ONT

LIRONT

Liberia

Fri 6/20

11:05 am-9:10 pm

1 stop11h 05m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 14 results

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?

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

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

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

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,918 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,920 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,685 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Avianca

6.7

Okay

2,317 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

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 $188. However, be on the lookout for offers from Avianca and American Airlines, 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

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Costa Rica to Ontario

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$328	Average$439	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$408	Average$596	FlexibilityNo cancel fee	On-time71%

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$160+ 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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Costa Rica to Ontario with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 24, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Costa Rica to Ontario

Cheapest flights from Costa Rica to OntarioExplore 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 24, 2025.

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 24, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Costa Rica to Ontario that are best for you.

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.

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?

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 24, 2025.

Rainfall in Ontario by month

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

Temperature in Ontario by month

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

Reviews of airlines servicing Ontario

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?

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Costa Rica to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Costa Rica to Ontario

100% Free

Book with Flexibility

Travel Smart

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 24, 2025.