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Ontario

$210+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — ONT
Apr 25 — May 21
Sat 4/25
Sat 5/2
1 adult, Economy
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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 March 26, 2026.

This Avianca deal was found by Cheapflights users on 3/23. 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 9/53:10 pm
SJO
-
ONT
1 stop7h 35m
Avianca
Sat 9/1911:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Deal found 3/23$372
This United Airlines deal was found by Cheapflights users on 3/21. 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 10/2811:35 am
SJO
-
ONT
2 stops12h 31m
United Airlines
Wed 11/41:00 pm
ONT
-
SJO
2 stops20h 25m
United Airlines
Deal found 3/21$375
This Avianca deal was found by Cheapflights users on 3/24. 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.
Tue 5/53:10 pm
SJO
-
ONT
1 stop7h 35m
Avianca
Thu 5/1411:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Deal found 3/24$383
This Mytrip deal was found by Cheapflights users on 3/21. 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.
Sat 9/53:10 pm
SJO
-
ONT
1 stop7h 35m
Avianca
Sat 9/1211:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Deal found 3/21$384
This United Airlines deal was found by Cheapflights users on 3/21. 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 10/261:20 pm
SJO
-
ONT
2 stops24h 00m
United Airlines
Sun 11/16:00 am
ONT
-
SJO
2 stops27h 25m
United Airlines
Deal found 3/21$388
This American Airlines deal was found by Cheapflights users on 3/24. 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 9/1012:57 pm
SJO
-
ONT
1 stop11h 09m
American Airlines
Thu 9/2412:35 pm
ONT
-
SJO
2 stops21h 30m
American Airlines
Deal found 3/24$394
This United Airlines deal was found by Cheapflights users on 3/25. 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 9/151:25 pm
SJO
-
ONT
1 stop9h 34m
United Airlines
Tue 9/295:00 am
ONT
-
SJO
2 stops30h 26m
United Airlines
Deal found 3/25$396
This FlightHub deal was found by Cheapflights users on 3/22. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/69:40 am
SJO
-
ONT
1 stop13h 05m
Avianca
Tue 10/2011:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Deal found 3/22$398
This Trip.com deal was found by Cheapflights users on 3/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/219:35 am
SJO
-
ONT
1 stop13h 20m
Avianca
Sat 11/2810:30 pm
ONT
-
SJO
1 stop10h 55m
Avianca
Deal found 3/25$404
This Mytrip deal was found by Cheapflights users on 3/21. 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.
Mon 10/127:45 pm
SJO
-
ONT
1 stop27h 00m
Avianca
Sat 10/1711:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Deal found 3/21$405
This Gotogate deal was found by Cheapflights users on 3/21. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:45 pm
SJO
-
ONT
1 stop27h 00m
Avianca
Sat 5/911:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Deal found 3/21$406
This United Airlines deal was found by Cheapflights users on 3/22. 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 10/161:20 pm
LIR
-
ONT
2 stops24h 00m
United Airlines
Sun 10/255:00 am
ONT
-
LIR
1 stop9h 08m
United Airlines
Deal found 3/22$565

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 March 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$372
(Avianca)

One-way from

$210
(FlightHub)

Popular in

June

Cheapest in

September

Average price

$436
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 ($28 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 March 2026
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 March 26, 2026.
Use the filters below to find and compare flights from Costa Rica to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 4/21

7:55 am-9:50 pm

1 stop14h 55m

Ontario

Sun 4/26

1:27 pm-10:11 am

2 stops19h 44m

$375

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 5/28

11:13 am-9:55 pm

1 stop11h 42m

Ontario

Tue 6/2

1:50 pm-7:15 am

1 stop16h 25m

$375

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 5/8

8:45 am-9:41 am

1 stop25h 56m

Ontario

Tue 5/12

1:30 pm-7:15 am

1 stop16h 45m

$375

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 4/28

8:45 am-12:20 pm

1 stop28h 35m

Ontario

Wed 5/13

6:59 pm-7:37 pm

2 stops23h 38m

$375

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sun 5/17

8:45 am-10:59 pm

1 stop15h 14m

Ontario

Sun 5/24

6:00 am-7:15 am

1 stop24h 15m

$396

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 4/23

8:45 am-9:56 am

1 stop26h 11m

Ontario

Sun 5/3

6:00 am-7:15 am

1 stop24h 15m

$396

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 5/13

8:45 am-10:59 pm

1 stop15h 14m

Ontario

Sat 5/30

1:18 pm-10:11 am

2 stops19h 53m

$396

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 5/20

1:25 pm-5:28 pm

2 stops29h 03m

Ontario

Wed 5/27

1:18 pm-10:11 am

2 stops19h 53m

$396
Quickest round-trip

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sun 5/3

8:45 am-5:52 pm

1 stop10h 07m

Ontario

Fri 5/8

6:59 pm-7:15 am

1 stop11h 16m

$396

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 4/22

11:13 am-9:56 am

2 stops23h 43m

Ontario

Sun 4/26

1:27 pm-10:11 am

2 stops19h 44m

$413

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/21

Showing 1-10 of 36 resultsSorted by cheapest first
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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, September is the cheapest month in which you can book a flight from Costa Rica to Ontario (average of $189). Flying from Costa Rica to Ontario in June is currently the most expensive (average of $265). 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.

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 March 26, 2026.
Read through reviews of airlines operating flights from Costa Rica to Ontario, such as United Airlines and Avianca. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,478 reviews

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

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
9,478 reviews
United Airlines
7.4
Good
9,478 reviews

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Avianca
6.5
Okay
2,505 reviews
United Airlines
7.4
Good
9,478 reviews

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

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 55m. 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, September is the cheapest month in which you can book a flight from Costa Rica to Ontario (average of $189). Flying from Costa Rica to Ontario in June is currently the most expensive (average of $265). 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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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 March 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$267Average$382FlexibilityNo cancel feeOn-time69%
AviancaCheapest$361Average$430FlexibilityNo cancel feeOn-time71%

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