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Ontario

$175+ 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 6/17. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$318
(United Airlines)

One-way from

$175
(FlightHub)

Popular in

December

Cheapest in

September

Average price

$489
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 ($32 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 June 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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/12. 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 11/179:40 amSJO - ONT
1 stop9h 54mUnited Airlines
Mon 11/246:38 pmONT - SJO
2 stops14h 47mUnited Airlines
Deal found 6/12$318
This American Airlines deal was found by Cheapflights users on 6/10. 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 10/37:21 amSJO - ONT
1 stop29h 35mAmerican Airlines
Sat 10/113:00 pmONT - SJO
2 stops21h 00mAmerican Airlines
Deal found 6/10$344
This Kissandfly.com deal was found by Cheapflights users on 6/11. 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.
Sat 7/197:55 amSJO - ONT
1 stop14h 42mLufthansa
Sat 7/266:00 amONT - SJO
1 stop12h 37mLufthansa
Deal found 6/11$359
This CheapOair deal was found by Cheapflights users on 6/11. 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.
Fri 11/74:13 pmSJO - ONT
1 stop9h 01mMultiple Airlines
Tue 12/21:04 amONT - SJO
1 stop20h 49mMultiple Airlines
Deal found 6/11$362
This Booking.com deal was found by Cheapflights users on 6/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/173:05 pmSJO - ONT
1 stop7h 50mAvianca
Thu 6/2611:25 pmONT - SJO
1 stop10h 50mAvianca
Deal found 6/11$433
This United Airlines deal was found by Cheapflights users on 6/9. 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 9/101:20 pmLIR - ONT
2 stops23h 53mUnited Airlines
Wed 9/176:50 pmONT - LIR
2 stops16h 20mUnited Airlines
Deal found 6/9$490
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/157:00 amSJO - ONT
2 stops17h 46mDelta
Fri 11/2810:59 pmONT - SJO
1 stop21h 16mDelta
Deal found 6/10$564

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 June 12, 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

Mon 11/17

9:40 am-5:34 pm

1 stop9h 54m

Ontario

Mon 11/24

6:38 pm-11:25 am

2 stops14h 47m

$318

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 10/3

12:12 pm-10:04 am

2 stops22h 52m

Ontario

Sat 10/11

3:00 pm-1:00 pm

2 stops21h 00m

$344

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 9/24

1:18 pm-10:41 pm

1 stop10h 23m

Ontario

Mon 9/29

5:05 pm-11:53 am

2 stops17h 48m

$354

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sat 7/19

7:55 am-9:37 pm

1 stop14h 42m

Ontario

Sat 7/26

6:00 am-7:37 pm

1 stop12h 37m

$359

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 11/7

4:13 pm-11:14 pm

1 stop9h 01m

Ontario

Tue 12/2

1:04 am-11:53 pm

1 stop20h 49m

$362

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sun 7/20

3:05 pm-9:55 pm

1 stop7h 50m

Ontario

Sat 7/26

11:25 pm-1:30 pm

1 stop13h 05m

$447

LiberiaOntario

LIR - ONT

LIRONT

Liberia

Wed 9/10

1:20 pm-12:13 pm

2 stops23h 53m

Ontario

Wed 9/17

6:50 pm-12:10 pm

2 stops16h 20m

$490

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 6/17

3:05 pm-9:55 pm

1 stop7h 50m

$175

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 6/24

8:45 am-5:39 pm

1 stop9h 54m

$186

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 6/19

11:59 pm-10:14 pm

1 stop23h 15m

$211

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 15 results
1
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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 $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?

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 June 12, 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.

Rainfall in Ontario by month

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

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

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 June 12, 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

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
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

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
2,345 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

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

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.

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

    The cheapest airline one-way is Avianca, with whom users have recently found tickets for as low as $175. However, be on the lookout for offers from United Airlines 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

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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 2 airlines flying from Costa Rica to Ontario

Discover the top 2 airlines 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$328Average$465FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$412Average$632FlexibilityNo cancel feeOn-time71%

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