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Ontario

$265+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — ONT
Jun 7 — Jun 141
Sun 6/7
Sun 6/14
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 May 8, 2026.

This United Airlines deal was found by Cheapflights users on 5/8. 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 5/88:45 am
SJO
-
ONT
1 stop10h 07m
United Airlines
Mon 5/1110:37 am
ONT
-
SJO
1 stop19h 38m
United Airlines
Deal found 5/8$470
This United Airlines deal was found by Cheapflights users on 5/6. 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 7/288:45 am
SJO
-
ONT
1 stop14h 52m
United Airlines
Wed 8/51:50 pm
ONT
-
SJO
1 stop16h 25m
United Airlines
Deal found 5/6$479
This American Airlines deal was found by Cheapflights users on 5/5. 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 12/126:20 am
SJO
-
ONT
2 stops17h 40m
American Airlines
Sat 2/2010:40 pm
ONT
-
SJO
1 stop11h 52m
American Airlines
Deal found 5/5$483
This American Airlines deal was found by Cheapflights users on 5/3. 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.
Mon 9/2812:57 pm
SJO
-
ONT
1 stop21h 32m
American Airlines
Tue 10/62:22 pm
ONT
-
SJO
1 stop22h 36m
American Airlines
Deal found 5/3$488
This American Airlines deal was found by Cheapflights users on 5/7. 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 7/2311:41 pm
SJO
-
ONT
1 stop13h 04m
American Airlines
Wed 7/297:14 pm
ONT
-
SJO
2 stops16h 46m
American Airlines
Deal found 5/7$497
This KAYAK deal was found by Cheapflights users on 5/4. 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.
Fri 5/88:45 am
SJO
-
ONT
1 stop10h 07m
Multiple Airlines
Sun 5/106:59 pm
ONT
-
SJO
1 stop11h 16m
Multiple Airlines
Deal found 5/4$528
This United Airlines deal was found by Cheapflights users on 5/7. 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 10/178:45 am
SJO
-
ONT
1 stop15h 14m
United Airlines
Tue 10/206:00 am
ONT
-
SJO
1 stop12h 37m
United Airlines
Deal found 5/7$529
This Avianca deal was found by Cheapflights users on 5/3. 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.
Thu 10/153:10 pm
SJO
-
ONT
1 stop7h 35m
Avianca
Thu 10/2211:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Deal found 5/3$530
This KAYAK deal was found by Cheapflights users on 5/6. 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 12/242:20 pm
SJO
-
ONT
1 stop9h 01m
Copa Airlines
Fri 1/16:53 pm
ONT
-
SJO
2 stops21h 23m
Copa Airlines
Deal found 5/6$532
This United Airlines deal was found by Cheapflights users on 5/7. 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 12/128:45 am
SJO
-
ONT
1 stop14h 36m
United Airlines
Sat 2/201:33 pm
ONT
-
SJO
1 stop16h 59m
United Airlines
Deal found 5/7$538
This Ovago deal was found by Cheapflights users on 5/7. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/271:20 pm
SJO
-
ONT
1 stop9h 01m
Multiple Airlines
Sat 10/316:02 am
ONT
-
SJO
1 stop28h 23m
Multiple Airlines
Deal found 5/7$540
This United Airlines deal was found by Cheapflights users on 5/7. 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 10/21:20 pm
LIR
-
ONT
1 stop9h 38m
United Airlines
Tue 10/65:00 am
ONT
-
LIR
2 stops30h 10m
United Airlines
Deal found 5/7$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 May 8, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$470
(United Airlines)

One-way from

$265
(United Airlines)

Popular in

June

Cheapest in

September

Average price

$408
Provider with most accurate pricing for San José Juan Santamaria Intl-Los Angeles Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for San José Juan Santamaria Intl-Los Angeles 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. 7% potential increase in price ($31 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 8, 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
Quickest round-trip

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 5/21

1:25 pm-9:55 pm

1 stop9h 30m

Ontario

Thu 5/28

1:50 pm-7:15 am

1 stop16h 25m

$470

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 11/3

8:45 am-8:20 pm

2 stops13h 35m

Ontario

Tue 11/10

6:53 pm-11:25 am

2 stops14h 32m

$470

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 7/22

7:55 am-10:37 pm

2 stops15h 42m

Ontario

Thu 7/30

1:50 pm-10:11 am

2 stops19h 21m

$470

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 6/3

12:30 am-5:28 pm

2 stops17h 58m

Ontario

Sun 6/7

6:00 am-7:15 am

1 stop24h 15m

$470

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 10/8

8:45 am-10:59 pm

1 stop15h 14m

Ontario

Sat 10/17

9:39 am-12:21 pm

2 stops25h 42m

$470

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 5/19

8:45 am-10:59 pm

1 stop15h 14m

Ontario

Tue 5/26

6:00 am-7:15 am

1 stop24h 15m

$470

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 11/4

9:40 am-5:47 pm

1 stop10h 07m

Ontario

Sat 11/7

1:00 pm-11:25 am

2 stops20h 25m

$470

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 10/20

1:25 pm-9:58 pm

1 stop9h 33m

Ontario

Sat 10/24

1:49 pm-10:25 am

2 stops19h 36m

$470

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sat 10/24

1:25 pm-9:58 pm

1 stop9h 33m

Ontario

Wed 11/11

6:02 am-11:25 am

1 stop27h 23m

$470

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sat 10/17

7:55 am-10:59 pm

2 stops16h 04m

Ontario

Fri 10/30

6:02 am-10:25 am

1 stop27h 23m

$529

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/3

Showing 1-10 of 34 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

How far ahead should I book a flight from Costa Rica to Ontario?

To ensure you get the cheapest price possible for a flight from Costa Rica to Ontario, you should look to book at least 8 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 $216). Flying from Costa Rica to Ontario in November is currently the most expensive (average of $321). 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 May 8, 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
9,693 reviews

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

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
9,693 reviews
United Airlines
7.4
Good
9,693 reviews

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

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
2,523 reviews
United Airlines
7.4
Good
9,693 reviews

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

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 28h 27m. 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 $161. 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, September is the cheapest month in which you can book a flight from Costa Rica to Ontario (average of $216). Flying from Costa Rica to Ontario in November is currently the most expensive (average of $321). 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

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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 May 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$267Average$385FlexibilityNo cancel feeOn-time69%
AviancaCheapest$361Average$430FlexibilityNo cancel feeOn-time71%

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