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 $184. 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.

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 16% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $429 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $443.

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 December.

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.

$452+ 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	$318 (CheapOair)
One-way from	$159 (CheapOair)
Popular in	December
Cheapest in	September
Average price	$368

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. 7% potential increase in price ($30 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 May 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 May 1, 2025.

Tue 5/203:31 pmSJO - ONT

1 stop8h 42mMultiple Airlines

Mon 5/261:09 amONT - SJO

1 stop21h 05mMultiple Airlines

Deal found 4/30

$318

Thu 5/87:55 amSJO - ONT

2 stops29h 29mUnited Airlines

Tue 5/131:45 pmONT - SJO

2 stops28h 52mUnited Airlines

Deal found 4/30

$321

Fri 10/241:13 pmSJO - ONT

1 stop10h 28mDelta

Sat 10/2510:59 pmONT - SJO

1 stop11h 49mDelta

Deal found 4/30

$332

Wed 8/132:35 pmSJO - ONT

2 stops20h 24mAmerican Airlines

Sat 8/166:10 amONT - SJO

2 stops13h 04mAmerican Airlines

Deal found 4/30

$338

Thu 5/229:35 amSJO - ONT

1 stop13h 20mAvianca

Tue 6/2411:25 pmONT - SJO

1 stop18h 20mAvianca

Deal found 4/30

$417

Thu 6/261:20 pmLIR - ONT

1 stop9h 17mUnited Airlines

Mon 6/306:00 amONT - LIR

1 stop7h 23mUnited Airlines

Deal found 4/29

$481

Sat 5/242:26 pmLIR - ONT

2 stops19h 28mAmerican Airlines

Fri 6/612:59 amONT - LIR

1 stop10h 55mAmerican Airlines

Deal found 4/30

$836

Sat 5/2411:20 amLIR - ONT

3 stops29h 30mAlaska Airlines

Sat 6/77:30 amONT - LIR

2 stops21h 50mAlaska Airlines

Deal found 4/30

$1,110

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 May 1, 2025.

Tue 5/203:31 pmSJO - ONT

1 stop8h 42mMultiple Airlines

Mon 5/261:09 amONT - SJO

1 stop21h 05mMultiple Airlines

Deal found 4/30

$318

Thu 5/87:55 amSJO - ONT

2 stops29h 29mUnited Airlines

Tue 5/136:08 amONT - SJO

1 stop12h 29mUnited Airlines

Deal found 4/30

$321

Thu 5/229:35 amSJO - ONT

1 stop13h 20mAvianca

Tue 6/2411:25 pmONT - SJO

1 stop18h 20mAvianca

Deal found 4/30

$417

Thu 5/2211:59 pmSJO - ONT

1 stop10h 51mAmerican Airlines

Thu 5/2912:45 pmONT - SJO

1 stop8h 32mAmerican Airlines

Deal found 4/30

$496

Sat 5/31:20 pmSJO - ONT

1 stop22h 37mDelta

Mon 5/510:15 pmONT - SJO

1 stop12h 40mDelta

Deal found 4/30

$540

Thu 6/261:20 pmLIR - ONT

1 stop9h 17mUnited Airlines

Mon 6/306:00 amONT - LIR

1 stop7h 23mUnited Airlines

Deal found 4/29

$481

Sat 5/2411:20 amLIR - ONT

3 stops29h 30mAlaska Airlines

Sat 6/77:30 amONT - LIR

2 stops21h 50mAlaska Airlines

Deal found 4/30

$1,110

Sat 5/242:26 pmLIR - ONT

2 stops19h 28mAmerican Airlines

Fri 6/612:59 amONT - LIR

1 stop10h 55mAmerican Airlines

Deal found 4/30

$836

Last-minute flights from Costa Rica to Ontario
Discover last-minute flight deals from Costa Rica to Ontario. Data last updated May 1, 2025 and is based on user searches.

Sat 5/31:20 pmSJO - ONT

1 stop22h 37mDelta

Mon 5/510:15 pmONT - SJO

1 stop12h 40mDelta

Deal found 4/30

$540

Thu 5/87:55 amSJO - ONT

2 stops29h 29mUnited Airlines

Tue 5/131:45 pmONT - SJO

2 stops28h 52mUnited Airlines

Deal found 4/30

$321

Fri 5/96:03 amSJO - ONT

2 stops18h 40mAmerican Airlines

Wed 5/147:30 amONT - SJO

1 stop13h 47mAmerican Airlines

Deal found 4/30

$340

Fri 5/97:45 pmSJO - ONT

1 stop27h 10mMultiple Airlines

Tue 5/1312:59 amONT - SJO

2 stops32h 28mMultiple Airlines

Deal found 4/30

$792

Sun 5/188:45 amLIR - ONT

1 stop28h 39mUnited Airlines

Thu 5/221:36 pmONT - LIR

1 stop27h 27mUnited Airlines

Deal found 4/29

$492

Tue 5/203:31 pmSJO - ONT

1 stop8h 42mMultiple Airlines

Mon 5/261:09 amONT - SJO

1 stop21h 05mMultiple Airlines

Deal found 4/30

$318

Thu 5/229:35 amSJO - ONT

1 stop13h 20mAvianca

Tue 6/2411:25 pmONT - SJO

1 stop18h 20mAvianca

Deal found 4/30

$417

Sat 5/242:26 pmLIR - ONT

2 stops19h 28mAmerican Airlines

Fri 6/612:59 amONT - LIR

1 stop10h 55mAmerican Airlines

Deal found 4/30

$836

Sat 5/2411:20 amLIR - ONT

3 stops29h 30mAlaska Airlines

Sat 6/77:30 amONT - LIR

2 stops21h 50mAlaska Airlines

Deal found 4/30

$1,110

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 May 1, 2025.

Tue 5/203:31 pmSJO - ONT

1 stop8h 42mMultiple Airlines

Deal found 4/30

$159

Tue 5/137:55 amSJO - ONT

1 stop15h 05mUnited Airlines

Deal found 4/30

$184

Thu 5/81:50 pmSJO - ONT

1 stop23h 00mAmerican Airlines

Deal found 4/30

$192

Thu 6/511:05 amLIR - ONT

1 stop11h 05mUnited Airlines

Deal found 4/29

$264

Fri 9/1212:55 pmLIR - ONT

2 stops21h 44mAmerican Airlines

Deal found 4/30

$273

Sun 6/13:05 pmSJO - ONT

1 stop7h 50mAvianca

Deal found 4/30

$280

Thu 6/511:20 amLIR - ONT

3 stops24h 37mAlaska Airlines

Deal found 4/30

$378

Mon 8/410:15 amLIR - ONT

3 stops23h 54mMultiple Airlines

Deal found 4/30

$482

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 5/20

3:31 pm-11:13 pm

1 stop8h 42m

Ontario

Mon 5/26

1:09 am-11:14 pm

1 stop21h 05m

$318

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 5/21

1:30 pm-12:31 pm

2 stops24h 01m

Ontario

Sat 5/24

6:00 am-10:11 am

1 stop27h 11m

$321

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 10/24

1:13 pm-10:41 pm

1 stop10h 28m

Ontario

Sat 10/25

10:59 pm-11:48 am

1 stop11h 49m

$332

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 8/13

2:35 pm-9:59 am

2 stops20h 24m

Ontario

Sat 8/16

6:10 am-8:14 pm

2 stops13h 04m

$338

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 5/22

9:35 am-9:55 pm

1 stop13h 20m

Ontario

Tue 6/24

11:25 pm-6:45 pm

1 stop18h 20m

$417

LiberiaOntario

LIR - ONT

LIRONT

Liberia

Thu 6/26

1:20 pm-9:37 pm

1 stop9h 17m

Ontario

Mon 6/30

6:00 am-2:23 pm

1 stop7h 23m

$481

LiberiaOntario

LIR - ONT

LIRONT

Liberia

Sat 5/24

2:26 pm-8:54 am

2 stops19h 28m

Ontario

Fri 6/6

12:59 am-12:54 pm

1 stop10h 55m

$836

LiberiaOntario

LIR - ONT

LIRONT

Liberia

Sat 5/24

11:20 am-3:50 pm

3 stops29h 30m

Ontario

Sat 6/7

7:30 am-6:20 am

2 stops21h 50m

$1,110

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 5/20

3:31 pm-11:13 pm

1 stop8h 42m

$159

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 5/13

7:55 am-10:00 pm

1 stop15h 05m

$184

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 16 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

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

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

9,968 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Delta

8.0

Very good

7,934 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,696 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Avianca

6.7

Okay

2,317 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 $184. 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

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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$159+ 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 5/20. 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 May 1, 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 May 1, 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 May 1, 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 May 1, 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

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 May 1, 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.

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

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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 May 1, 2025.