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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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — ONT
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 September 16, 2025.

Round-trip from

$267
(United Airlines)

One-way from

$148
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$354
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 ($39 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 September 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 September 16, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/253:05 pmSJO - ONT
1 stop7h 50mAvianca
Tue 9/3011:25 pmONT - SJO
1 stop10h 50mAvianca
Deal found 9/16$262
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/27:55 amSJO - ONT
2 stops15h 57mUnited Airlines
Wed 10/226:36 pmONT - SJO
1 stop11h 39mUnited Airlines
Deal found 9/14$267
This CheapOair deal was found by Cheapflights users on 9/14. 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.
Thu 9/185:05 amSJO - ONT
1 stop17h 50mAvianca
Sat 9/2011:25 pmONT - SJO
1 stop10h 50mAvianca
Deal found 9/14$275
This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/12:40 pmSJO - ONT
2 stops20h 16mAmerican Airlines
Tue 11/114:47 pmONT - SJO
2 stops19h 23mAmerican Airlines
Deal found 9/16$286
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/38:37 amSJO - ONT
1 stop15h 15mUnited Airlines
Mon 10/66:36 pmONT - SJO
1 stop11h 39mUnited Airlines
Deal found 9/14$306
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 10/233:05 pmSJO - ONT
1 stop7h 50mAvianca
Sat 11/111:30 pmONT - SJO
1 stop10h 55mAvianca
Deal found 9/15$310
This Avianca deal was found by Cheapflights users on 9/14. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/19:35 amSJO - ONT
1 stop13h 20mAvianca
Tue 11/1110:30 pmONT - SJO
1 stop18h 25mAvianca
Deal found 9/14$313
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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.
Sat 10/185:05 amSJO - ONT
1 stop17h 50mAvianca
Sat 10/2511:25 pmONT - SJO
1 stop13h 15mAvianca
Deal found 9/15$320
This CheapOair deal was found by Cheapflights users on 9/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/165:05 amSJO - ONT
1 stop17h 50mAvianca
Thu 10/2311:25 pmONT - SJO
1 stop10h 50mAvianca
Deal found 9/16$323
This Mytrip deal was found by Cheapflights users on 9/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/79:35 amSJO - ONT
1 stop13h 20mAvianca
Tue 10/2111:25 pmONT - SJO
1 stop18h 20mAvianca
Deal found 9/15$325
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/301:20 pmLIR - ONT
1 stop9h 29mUnited Airlines
Mon 11/36:38 pmONT - LIR
2 stops16h 32mUnited Airlines
Deal found 9/15$490
This United Airlines deal was found by Cheapflights users on 9/16. 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 12/1312:50 pmLIR - ONT
1 stop9h 52mUnited Airlines
Tue 12/3011:59 pmONT - LIR
1 stop12h 41mUnited Airlines
Deal found 9/16$511

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 September 16, 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 2/5

6:30 am-9:58 pm

1 stop17h 28m

Ontario

Sun 2/8

1:53 pm-8:32 am

1 stop16h 39m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 10/23

7:55 am-9:24 pm

1 stop14h 29m

Ontario

Sat 11/15

6:05 am-11:25 am

1 stop27h 20m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sun 2/8

6:30 am-9:58 pm

1 stop17h 28m

Ontario

Thu 2/19

1:52 pm-8:32 am

1 stop16h 40m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sun 10/5

8:37 am-10:52 pm

1 stop15h 15m

Ontario

Wed 10/22

6:36 pm-7:15 am

1 stop11h 39m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Mon 3/2

8:45 am-9:59 pm

1 stop15h 14m

Ontario

Mon 3/9

6:02 am-8:55 pm

1 stop13h 53m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 10/15

8:37 am-10:52 pm

1 stop15h 15m

Ontario

Wed 10/29

1:40 pm-12:15 pm

2 stops21h 35m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sun 2/1

6:30 am-10:53 pm

2 stops18h 23m

Ontario

Sat 2/7

7:00 am-12:56 pm

1 stop27h 56m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 2/6

6:30 am-10:53 pm

2 stops18h 23m

Ontario

Mon 2/9

6:39 pm-8:32 am

1 stop11h 53m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 11/12

8:45 am-8:44 pm

2 stops13h 59m

Ontario

Tue 11/18

1:40 pm-11:25 am

2 stops19h 45m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 11/12

12:35 pm-9:49 pm

1 stop11h 14m

Ontario

Sun 11/16

6:05 am-1:15 pm

1 stop29h 10m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 34 results
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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 $327). 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 September 16, 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.

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 September 16, 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
8,924 reviews

Boarding

7.7

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

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
8,924 reviews
United Airlines
7.4
Good
8,924 reviews

Boarding

7.7

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

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 14h 29m. 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, 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 $327). 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 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$324Average$428FlexibilityNo cancel feeOn-time69%

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