HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$158+ 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 3/16. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — ONT
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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

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 December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/2412:35 pmSJO - ONT
1 stop11h 17mUnited Airlines
Fri 1/96:00 amONT - SJO
1 stop24h 32mUnited Airlines
Deal found 12/16$267
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Wed 12/246:30 amSJO - ONT
2 stops16h 37mUnited Airlines
Thu 1/18:11 amONT - SJO
1 stop22h 21mUnited Airlines
Deal found 12/17$305
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/238:45 amSJO - ONT
2 stops14h 22mUnited Airlines
Thu 1/16:39 pmONT - SJO
1 stop11h 53mUnited Airlines
Deal found 12/16$343
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/248:45 amSJO - ONT
1 stop15h 07mUnited Airlines
Tue 12/306:39 pmONT - SJO
1 stop11h 53mUnited Airlines
Deal found 12/16$347
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/242:20 pmSJO - ONT
1 stop9h 32mUnited Airlines
Mon 1/56:39 pmONT - SJO
1 stop11h 53mUnited Airlines
Deal found 12/16$356
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/182:20 pmSJO - ONT
1 stop9h 32mUnited Airlines
Sat 12/275:05 amONT - SJO
2 stops37h 34mUnited Airlines
Deal found 12/17$384
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/252:20 pmSJO - ONT
1 stop9h 32mUnited Airlines
Mon 1/56:39 pmONT - SJO
2 stops16h 36mUnited Airlines
Deal found 12/16$394
This Kissandfly.com deal was found by Cheapflights users on 12/17. 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.
Mon 12/222:20 pmSJO - ONT
1 stop9h 32mLufthansa
Wed 12/315:05 amONT - SJO
1 stop14h 55mLufthansa
Deal found 12/17$404
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/229:40 amSJO - ONT
1 stop26h 21mUnited Airlines
Sun 2/16:00 amONT - SJO
1 stop24h 32mUnited Airlines
Deal found 12/17$421
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Fri 12/196:30 amSJO - ONT
2 stops29h 29mUnited Airlines
Tue 12/231:40 pmONT - SJO
2 stops28h 59mUnited Airlines
Deal found 12/17$426
This Cheapflightsfares deal was found by Cheapflights users on 12/18. 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.
Thu 12/259:35 amSJO - ONT
1 stop13h 20mAvianca
Sat 1/1010:30 pmONT - SJO
1 stop10h 55mAvianca
Deal found 12/18$429
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/278:35 amLIR - ONT
1 stop15h 17mUnited Airlines
Wed 12/3111:59 pmONT - LIR
1 stop12h 41mUnited Airlines
Deal found 12/16$743

Find 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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$265
(CheapOair)

One-way from

$158
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$476
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. 3% potential increase in price ($14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 18, 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

Thu 1/22

9:40 am-5:43 pm

1 stop10h 03m

Ontario

Sun 2/1

6:00 am-8:32 am

1 stop24h 32m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 1/21

6:30 am-8:58 pm

2 stops16h 28m

Ontario

Mon 1/26

1:24 pm-1:15 pm

2 stops21h 51m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 1/27

9:40 am-5:43 pm

1 stop10h 03m

Ontario

Tue 2/3

1:53 pm-8:39 pm

2 stops28h 46m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 1/23

9:40 am-10:53 pm

1 stop15h 13m

Ontario

Mon 2/2

1:53 pm-8:32 am

1 stop16h 39m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 5/1

8:45 am-10:52 pm

1 stop15h 07m

Ontario

Fri 5/8

6:54 pm-7:15 am

1 stop11h 21m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 1/28

8:45 am-10:53 pm

2 stops16h 08m

Ontario

Wed 2/25

6:37 pm-8:32 am

1 stop11h 55m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 1/29

9:40 am-10:53 pm

1 stop15h 13m

Ontario

Wed 2/25

1:50 pm-8:32 am

1 stop16h 42m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 5/1

8:45 am-10:52 pm

1 stop15h 07m

Ontario

Sat 5/9

11:05 am-7:15 am

1 stop19h 10m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 3/18

8:40 am-10:57 pm

1 stop15h 17m

Ontario

Sun 3/22

6:00 am-7:32 am

1 stop24h 32m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 1/29

9:40 am-10:53 pm

1 stop15h 13m

Ontario

Mon 2/2

6:00 am-8:32 am

1 stop24h 32m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 36 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, February is the cheapest month in which you can book a flight from Costa Rica to Ontario (average of $171). Flying from Costa Rica to Ontario in June is currently the most expensive (average of $252). 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 December 18, 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 December 18, 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
9,091 reviews

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Boarding

7.7

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
9,091 reviews
United Airlines
7.4
Good
9,091 reviews

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Boarding

7.7

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 10h 03m. Costa Rica and Ontario are separated by a distance of 2685 mi.

  • 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 $130. 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, February is the cheapest month in which you can book a flight from Costa Rica to Ontario (average of $171). Flying from Costa Rica to Ontario in June is currently the most expensive (average of $252). 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 Salvador to Los Angeles flights
San José to Los Angeles flights
San José to Las Vegas flights
San José to San Francisco flights
Guatemala City to Las Vegas flights
Guatemala City to Ontario flights
Panama City to Los Angeles flights
San Salvador to Las Vegas flights
San José to Ontario flights
Panama City to Las Vegas flights
Guatemala City to San Francisco flights
San Salvador to Ontario flights
San Salvador to San Francisco flights
San Pedro Sula to Los Angeles flights
San José to Burbank flights
San José to San Diego flights
Liberia to Los Angeles flights
Panama City to Ontario flights
San Salvador to Burbank flights
Philip S.W.Goldson to Los Angeles flights
Managua to Los Angeles flights
Panama City to San Francisco flights
Managua to San Francisco flights
San Pedro Sula to San Francisco flights
San Salvador to Oakland flights
San Pedro Sula to Las Vegas flights
Panama City to San Diego flights
San José to San Jose flights
San José to Sacramento flights
San José to Reno flights
San José to Oakland flights
Managua to Ontario flights
Liberia to Ontario flights
Managua to Las Vegas flights
Guatemala City to San Jose flights
Guatemala City to Sacramento flights
Guatemala City to Oakland flights
San Salvador to San Diego flights
Panama City to San Jose flights
Panama City to Sacramento flights
Philip S.W.Goldson to Las Vegas flights
Philip S.W.Goldson to Ontario flights
San Salvador to Santa Ana flights
San José to Santa Ana flights
Liberia to Las Vegas flights
Guatemala City to San Diego flights
San Salvador to Sacramento flights
Guatemala 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$267Average$396FlexibilityNo 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.