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Ontario

$186+ 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 8/8. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — ONT
Aug 6 — Aug 131
Wed 8/6
Wed 8/13
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 August 1, 2025.

Round-trip from

$318
(Cheapflightsfares)

One-way from

$186
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$380
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 ($35 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 1, 2025.

This United Airlines deal was found by Cheapflights users on 7/30. 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 9/221:30 pmSJO - ONT
2 stops24h 02mUnited Airlines
Sat 10/46:00 amONT - SJO
1 stop12h 37mUnited Airlines
Deal found 7/30$324
This American Airlines deal was found by Cheapflights users on 7/31. 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.
Tue 8/261:00 pmSJO - ONT
2 stops21h 58mAmerican Airlines
Wed 9/108:15 amONT - SJO
1 stop8h 42mAmerican Airlines
Deal found 7/31$344
This Cheapflightsfares deal was found by Cheapflights users on 7/31. 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 8/289:35 amSJO - ONT
1 stop13h 20mAvianca
Sat 8/3011:25 pmONT - SJO
1 stop10h 50mAvianca
Deal found 7/31$349
This Delta deal was found by Cheapflights users on 7/31. 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.
Thu 9/251:35 pmSJO - ONT
2 stops23h 42mDelta
Thu 10/21:15 pmONT - SJO
2 stops21h 53mDelta
Deal found 7/31$354
This United Airlines deal was found by Cheapflights users on 7/30. 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 10/11:20 pmLIR - ONT
1 stop9h 04mUnited Airlines
Sun 10/56:00 amONT - LIR
1 stop29h 10mUnited Airlines
Deal found 7/30$399
This OneTravel deal was found by Cheapflights users on 7/31. 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 OneTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/174:13 pmSJO - ONT
1 stop8h 59mMultiple Airlines
Sun 11/231:02 amONT - SJO
1 stop20h 51mMultiple Airlines
Deal found 7/31$491
This KAYAK deal was found by Cheapflights users on 7/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/312:10 pmLIR - ONT
1 stop32h 59mJetBlue
Tue 8/1211:59 pmONT - LIR
1 stop12h 06mJetBlue
Deal found 7/29$1,395

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 August 1, 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 9/22

7:55 am-8:33 pm

2 stops13h 38m

Ontario

Fri 9/26

6:27 pm-12:26 pm

2 stops16h 59m

$324

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 8/26

1:00 pm-9:58 am

2 stops21h 58m

Ontario

Wed 9/10

8:15 am-5:57 pm

1 stop8h 42m

$344

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 8/28

9:35 am-9:55 pm

1 stop13h 20m

Ontario

Sat 8/30

11:25 pm-11:15 am

1 stop10h 50m

$349

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 9/25

1:35 pm-12:17 pm

2 stops23h 42m

Ontario

Thu 10/2

1:15 pm-12:08 pm

2 stops21h 53m

$354

LiberiaOntario

LIR - ONT

LIRONT

Liberia

Wed 10/1

1:20 pm-9:24 pm

1 stop9h 04m

Ontario

Sun 10/5

6:00 am-12:10 pm

1 stop29h 10m

$399

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Mon 11/17

4:13 pm-11:12 pm

1 stop8h 59m

Ontario

Sun 11/23

1:02 am-11:53 pm

1 stop20h 51m

$491

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 8/8

5:30 am-9:37 pm

1 stop17h 07m

$186

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 8/28

9:35 am-9:55 pm

1 stop13h 20m

$206

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 12/9

2:51 pm-9:58 pm

1 stop9h 07m

$218

LiberiaOntario

LIR - ONT

LIRONT

Liberia

Fri 9/12

1:25 pm-10:23 pm

1 stop9h 58m

$223

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 16 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 $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 August 1, 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 August 1, 2025.
Read through reviews of airlines operating flights from Costa Rica to Ontario, such as Alaska Airlines, Southwest, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

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

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

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
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

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
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

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

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

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 United Airlines, with whom users have recently found tickets for as low as $186. However, be on the lookout for offers from Avianca 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 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 August 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$324Average$439FlexibilityNo cancel feeOn-time69%

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