HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$148+ 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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — ONT
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Costa Rica to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$267
(United Airlines)

One-way from

$148
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$396
Provider with most accurate pricing for San José Juan Santamaria Intl-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for San José Juan Santamaria Intl-Los Angeles flights.
Search Deals
From Costa Rica to Ontario
Search Deals
One-way flight from Costa Rica to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($29 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 3, 2025.

This United Airlines deal was found by Cheapflights users on 11/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/69:40 amSJO - ONT
1 stop9h 57mUnited Airlines
Thu 1/221:24 pmONT - SJO
2 stops21h 51mUnited Airlines
Deal found 11/1$267
This American Airlines deal was found by Cheapflights users on 11/2. 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 11/156:22 amSJO - ONT
1 stop9h 40mAmerican Airlines
Sat 12/63:04 pmONT - SJO
2 stops20h 35mAmerican Airlines
Deal found 11/2$286
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Mon 11/39:40 amSJO - ONT
1 stop15h 11mUnited Airlines
Mon 11/106:38 pmONT - SJO
1 stop11h 54mUnited Airlines
Deal found 11/2$321
This American Airlines deal was found by Cheapflights users on 11/2. 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.
Fri 12/122:56 pmSJO - ONT
1 stop20h 58mAmerican Airlines
Wed 4/226:00 amONT - SJO
1 stop14h 55mAmerican Airlines
Deal found 11/2$329
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/113:05 pmSJO - ONT
1 stop7h 50mMultiple Airlines
Tue 1/208:30 amONT - SJO
2 stops25h 44mMultiple Airlines
Deal found 11/1$336
This United Airlines deal was found by Cheapflights users on 11/2. 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 11/188:45 amSJO - ONT
1 stop15h 04mUnited Airlines
Tue 11/251:29 pmONT - SJO
2 stops19h 56mUnited Airlines
Deal found 11/2$356
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Thu 11/612:35 pmSJO - ONT
1 stop11h 14mUnited Airlines
Sat 11/85:05 amONT - SJO
2 stops13h 34mUnited Airlines
Deal found 11/2$375
This American Airlines deal was found by Cheapflights users on 11/2. 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.
Thu 11/136:22 amSJO - ONT
1 stop18h 01mAmerican Airlines
Wed 11/196:10 amONT - SJO
2 stops14h 03mAmerican Airlines
Deal found 11/2$376
This American Airlines deal was found by Cheapflights users on 11/2. 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.
Wed 12/1712:34 amSJO - ONT
1 stop11h 21mAmerican Airlines
Wed 1/74:45 pmONT - SJO
2 stops20h 16mAmerican Airlines
Deal found 11/2$380
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Thu 11/1312:35 pmSJO - ONT
1 stop11h 14mUnited Airlines
Wed 11/196:05 amONT - SJO
1 stop12h 34mUnited Airlines
Deal found 11/3$383
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Thu 12/412:50 pmLIR - ONT
1 stop9h 52mUnited Airlines
Sun 12/76:41 pmONT - LIR
2 stops16h 29mUnited Airlines
Deal found 11/3$490
This United Airlines deal was found by Cheapflights users on 11/3. 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 12/2012:15 pmLIR - ONT
1 stop12h 10mUnited Airlines
Sun 1/46:04 amONT - LIR
1 stop10h 33mUnited Airlines
Deal found 11/3$527

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 November 3, 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

Sat 12/20

6:30 am-9:52 pm

1 stop17h 22m

Ontario

Sat 1/24

1:53 pm-8:32 am

1 stop16h 39m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Mon 11/10

9:40 am-5:34 pm

1 stop9h 54m

Ontario

Thu 11/13

1:40 pm-8:32 am

1 stop16h 52m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sat 11/15

8:45 am-8:44 pm

2 stops13h 59m

Ontario

Tue 11/18

1:33 pm-11:25 am

2 stops19h 52m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 11/20

9:40 am-10:51 pm

1 stop15h 11m

Ontario

Thu 11/27

6:05 am-1:15 pm

1 stop29h 10m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 11/14

2:20 pm-5:34 pm

2 stops29h 14m

Ontario

Mon 11/17

6:05 am-11:25 am

1 stop27h 20m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 11/11

9:40 am-5:34 pm

1 stop9h 54m

Ontario

Wed 11/12

6:38 pm-11:25 am

2 stops14h 47m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sat 12/27

8:45 am-9:52 pm

1 stop15h 07m

Ontario

Mon 1/12

6:39 pm-8:32 am

1 stop11h 53m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 11/11

9:40 am-10:51 pm

1 stop15h 11m

Ontario

Tue 11/18

6:05 am-8:39 pm

1 stop12h 34m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 11/7

8:45 am-9:49 pm

1 stop15h 04m

Ontario

Tue 11/11

6:38 pm-1:15 pm

2 stops16h 37m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 1/27

9:40 am-10:53 pm

1 stop15h 13m

Ontario

Sun 2/1

6:00 am-8:32 am

1 stop24h 32m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Showing 1-10 of 38 results
1
2
3
4

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, April is the cheapest month in which you can book a flight from Costa Rica to Ontario (average of $178). Flying from Costa Rica to Ontario in August is currently the most expensive (average of $247). 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 November 3, 2025.

It’s typically best to fly out from Costa Rica to Ontario in the afternoon. Doing so could potentially save you 60% on the flight price compared to flying at noon, which is usually more expensive.

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 November 3, 2025.
Read through reviews of airlines operating flights from Costa Rica to Ontario, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,997 reviews

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,997 reviews
United Airlines
7.4
Good
8,997 reviews

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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.

  • How long is the flight from Costa Rica to Ontario?

    Departing from Costa Rica to Ontario will take you 17h 22m. Costa Rica and Ontario are separated by a distance of 2685 mi.

  • 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, April is the cheapest month in which you can book a flight from Costa Rica to Ontario (average of $178). Flying from Costa Rica to Ontario in August is currently the most expensive (average of $247). 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

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.
Guatemala City to Los Angeles flights
San José to Los Angeles flights
San Salvador to Los Angeles flights
San José to Las Vegas flights
Guatemala City to Ontario flights
San Salvador to Ontario flights
San José to San Francisco flights
Guatemala City to Las Vegas flights
San José to Ontario flights
San Salvador to San Francisco flights
Guatemala City to San Francisco flights
San Salvador to Las Vegas flights
Panama City to Los Angeles flights
San Pedro Sula to Los Angeles flights
Panama City to Las Vegas flights
Philip S.W.Goldson to Los Angeles flights
Managua to San Francisco flights
San José to San Diego flights
San Salvador to Oakland flights
San Pedro Sula to San Francisco flights
San Salvador to Burbank flights
Panama City to San Francisco flights
Managua to Los Angeles flights
San Pedro Sula to Las Vegas flights
Panama City to San Diego flights
Guatemala City to San Jose flights
Liberia to Los Angeles flights
Guatemala City to Oakland flights
Managua to Ontario flights
San José to Sacramento flights
Guatemala City to San Diego flights
San Salvador to San Jose flights
Panama City to Ontario flights
San José to San Jose flights
San José to Oakland flights
Guatemala City to Reno flights
San José to Reno flights
San Salvador to Santa Ana flights
Guatemala City to Santa Ana flights
Managua to Las Vegas flights
Philip S.W.Goldson to Ontario flights
San Salvador to Sacramento flights
San José to Burbank flights
San José to Santa Ana flights
Panama City to San Jose flights
Guatemala City to Sacramento flights
San Salvador to Reno flights
San Salvador to San Diego flights
Panama City to Santa Ana flights

Top airline flying from Costa Rica to Ontario

Discover the top airline 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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$267Average$420FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.