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Ontario

$169+ 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — ONT
Mar 10 — Mar 171
Tue 3/10
Tue 3/17
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 February 8, 2026.

This United Airlines deal was found by Cheapflights users on 2/6. 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.
Mon 3/98:40 am
SJO
-
ONT
1 stop15h 17m
United Airlines
Wed 3/181:50 pm
ONT
-
SJO
2 stops30h 42m
United Airlines
Deal found 2/6$290
This United Airlines deal was found by Cheapflights users on 2/6. 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.
Fri 5/18:45 am
SJO
-
ONT
1 stop15h 14m
United Airlines
Wed 5/66:59 pm
ONT
-
SJO
1 stop11h 16m
United Airlines
Deal found 2/6$301
This Gurufare deal was found by Cheapflights users on 2/7. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/79:40 am
SJO
-
ONT
1 stop15h 17m
Azul
Mon 3/2311:59 pm
ONT
-
SJO
1 stop10h 57m
Azul
Deal found 2/7$309
This United Airlines deal was found by Cheapflights users on 2/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/112:20 pm
SJO
-
ONT
2 stops24h 18m
United Airlines
Mon 2/166:37 pm
ONT
-
SJO
1 stop11h 55m
United Airlines
Deal found 2/5$317
This United Airlines deal was found by Cheapflights users on 2/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:45 am
SJO
-
ONT
1 stop25h 56m
United Airlines
Fri 5/156:00 am
ONT
-
SJO
1 stop24h 15m
United Airlines
Deal found 2/5$322
This Trip.com deal was found by Cheapflights users on 2/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/73:10 pm
SJO
-
ONT
1 stop7h 35m
Avianca
Sat 5/1611:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Deal found 2/5$325
This United Airlines deal was found by Cheapflights users on 2/7. 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.
Tue 7/711:13 am
SJO
-
ONT
2 stops34h 04m
United Airlines
Sat 8/16:00 am
ONT
-
SJO
2 stops39h 39m
United Airlines
Deal found 2/7$328
This Trip.com deal was found by Cheapflights users on 2/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:45 pm
SJO
-
ONT
1 stop27h 00m
Avianca
Sat 5/1611:35 pm
ONT
-
SJO
1 stop10h 55m
Avianca
Deal found 2/5$343
This United Airlines deal was found by Cheapflights users on 2/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/112:20 pm
SJO
-
ONT
2 stops24h 18m
United Airlines
Tue 2/176:10 am
ONT
-
SJO
1 stop24h 22m
United Airlines
Deal found 2/5$345
This United Airlines deal was found by Cheapflights users on 2/7. 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.
Thu 9/101:20 pm
LIR
-
ONT
2 stops24h 00m
United Airlines
Wed 9/166:30 pm
ONT
-
LIR
2 stops16h 40m
United Airlines
Deal found 2/7$528
This United Airlines deal was found by Cheapflights users on 2/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/712:15 pm
LIR
-
ONT
1 stop12h 21m
United Airlines
Tue 3/106:00 am
ONT
-
LIR
1 stop10h 37m
United Airlines
Deal found 2/5$533
This United Airlines deal was found by Cheapflights users on 2/6. 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.
Fri 4/171:20 pm
LIR
-
ONT
1 stop9h 30m
United Airlines
Fri 4/245:10 am
ONT
-
LIR
1 stop9h 09m
United Airlines
Deal found 2/6$549

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 February 8, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$290
(United Airlines)

One-way from

$169
(United Airlines)

Popular in

June

Cheapest in

September

Average price

$362
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. 5% potential increase in price ($24 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 February 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 February 8, 2026.
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

Wed 3/11

5:30 am-10:36 pm

1 stop18h 06m

Ontario

Tue 3/17

1:50 pm-12:15 pm

2 stops21h 25m

$290

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 2/26

8:45 am-9:59 pm

1 stop15h 14m

Ontario

Mon 3/2

6:37 pm-8:32 am

1 stop11h 55m

$290

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 3/10

5:30 am-12:18 pm

2 stops31h 48m

Ontario

Wed 3/18

1:50 pm-9:32 pm

2 stops30h 42m

$290

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 4/22

7:55 am-9:50 pm

1 stop14h 55m

Ontario

Sat 4/25

6:49 pm-7:15 am

1 stop11h 26m

$301

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 5/1

7:55 am-9:41 am

2 stops26h 46m

Ontario

Fri 5/8

6:59 pm-7:15 am

1 stop11h 16m

$301

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 5/1

7:55 am-9:41 am

2 stops26h 46m

Ontario

Sun 5/10

6:00 am-7:15 am

1 stop24h 15m

$301

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 5/8

8:45 am-12:22 pm

1 stop28h 37m

Ontario

Sat 5/16

1:30 pm-7:15 am

1 stop16h 45m

$301

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 4/22

7:55 am-10:45 pm

2 stops15h 50m

Ontario

Mon 4/27

6:00 am-7:15 am

1 stop24h 15m

$301

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 5/13

7:55 am-9:58 pm

1 stop15h 03m

Ontario

Sat 5/16

10:43 am-7:15 am

1 stop19h 32m

$301

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 4/22

7:55 am-10:45 pm

2 stops15h 50m

Ontario

Tue 4/28

6:05 am-7:37 pm

1 stop12h 32m

$301

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/7

Showing 1-10 of 37 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, February is the cheapest month in which you can book a flight from Costa Rica to Ontario (average of $152). Flying from Costa Rica to Ontario in June is currently the most expensive (average of $252). 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 February 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
9,254 reviews

Overall

7.4

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

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
9,254 reviews
United Airlines
7.4
Good
9,254 reviews

Overall

7.4

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

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
2,497 reviews
United Airlines
7.4
Good
9,254 reviews

Overall

7.4

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

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 31h 48m. 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 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, February is the cheapest month in which you can book a flight from Costa Rica to Ontario (average of $152). Flying from Costa Rica to Ontario in June is currently the most expensive (average of $252). 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 February 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$267Average$388FlexibilityNo cancel feeOn-time69%
AviancaCheapest$361Average$430FlexibilityNo cancel feeOn-time71%

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