$253 Find Cheap Flights from Ontario to Costa Rica - Compare and Save

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Cheap Flights from Ontario to Costa Rica

Cheapest round-trip prices found by our users on KAYAK in the last 5 days
Sort by: Cheapest
San José
8h 05m2 stops
from $579per person
Liberia
7h 25m2 stops
from $681per person
Booking Insights

Price, demand and travel trends for Ontario to Costa Rica flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What are the cheapest fares from Ontario to Costa Rica right now?

The cheapest fares from Ontario to Costa Rica on KAYAK in the last week were to San José Juan Santamaria Intl (SJO) from $579 round-trip, and to Liberia (LIR) from $681 round-trip.

What’s the cheapest month to fly from Ontario to Costa Rica?

November is the cheapest time of year to fly, with average fares of $454. Prices are highest in July, when average flight costs increase to around $787.

Which airport in Costa Rica is the cheapest to fly to from Ontario?

Based on KAYAK data from the past 12 months, the cheapest airports to fly into Costa Rica are:

• San José Juan Santamaria Intl (SJO) from $516
• Liberia (LIR) from $794

What’s the cheapest day to fly from Ontario to Costa Rica?

Tuesday tends to be the cheapest day to fly from Ontario to Costa Rica, while Monday is the most expensive. Fares run about 30% higher that day, based on the past 12 months of KAYAK data.

What's the cheapest time of day to fly from Ontario to Costa Rica?

Data from the past 12 months shows it's cheapest to fly to Costa Rica during the night with average prices of $519. The morning is the most expensive time to fly, with average prices of $661.

Key details for Ontario to Costa Rica flights

Low season

September

Cheapest flight

$253
The most popular month to fly with an average 13% increase in travelers.
One-way flight from Ontario to San José

Your Ontario to Costa Rica flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from Ontario to Costa Rica?

    Fares from Ontario to Costa Rica are around their usual level right now. A round-trip under $460 is considered a good deal, so it's worth keeping an eye out, or setting a Price Alert to catch price changes.

  • How much should I budget for a flight from Ontario to Costa Rica?

    Over the past 12 months, round-trip fares from Ontario to Costa Rica have ranged from $460 to $742.

  • What are the main airports serving Costa Rica?

    Flights to Costa Rica use two main airports, San José Juan Santamaria Intl (SJO) and Liberia (LIR).

  • What airlines fly nonstop from Ontario to Costa Rica?

    Based on the flight schedule for the next 3 months, no airline regularly operates nonstop flights from Ontario to Costa Rica. One-stop options include United Airlines and American Airlines.

  • Which cabin classes are available on flights from Ontario to Costa Rica?

    On flights from Ontario to Costa Rica you can only book Economy Class.

  • What are some popular landmarks in Costa Rica?

    KAYAK travelers' favorite landmarks in Costa Rica include:

    • Parque Metropolitano La Sabana
    • Estadio Nacional de Costa Rica
    • Museo de Oro
    • Morazan Park

Your guide to booking Ontario to Costa Rica flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your travel dates are flexible, book your trip for November when flights are typically cheapest and avoid July when prices are at their highest.
  • Flying on Tuesday is usually the cheapest. Flights on Monday cost about 30% more on average, so being flexible with your travel dates could help you save.
  • If you're looking to save, San José Juan Santamaria Intl (SJO) is the cheapest airport to fly into from Ontario. If you have onward travel, don't forget to factor in the cost of your journey by train, bus or domestic flight.
  • Start your trip in San José, which is the most popular destination in Costa Rica. From there, it's easy to continue on to other popular destinations such as La Fortuna, Tamarindo and Manuel Antonio.

Reviews of the top 3 airlines serving from Ontario to Costa Rica

 
Need help choosing which airline to fly with from Ontario to Costa Rica? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 10303 reviews
7.1Entertainment
8.1Crew
7.3Comfort
7.7Boarding
6.7Food
Airline reviews

Wifi is very frustrating - could not connect and therefore unable to work on the trip

6.0 GoodDavid Stephen, Oct 2026
Read more United Airlines reviews

Wifi is very frustrating - could not connect and therefore unable to work on the trip

Entertainment was great. Seats were good. They did not have my pre-ordered hot food product available but did comp me something cold in place of the item.

Food was good. Clean aircraft. But why do the airlines make the seats so narrow?! Your executives should have ride in a seat so restrictive for 11 hours and see how miserable it is! When.we got to MUC they changed my boarding gate 3 times for my next flight!!!!

Santa Barbara is a super small and easy airport. Breezed through rental car return, breezed through Security, ordered a coffee and muffin and to my gate in less than 30 minutes. Maybe because it was a small airport we got the oldest plane. Hardly any overhead space and absolutely zero internet. Its NFL Sunday man! That hurt.

We were delay because so many bags needed to be gate checked and it was disappointing not to have outlets in the seats for such a long flight.

overall a very good travel experience - left on time, arrived early. Mostly a smooth flight. Polaris seats were excellent, very good service and nice food with options.

Excellent. I had a medical emergency on flight SNA-ORD and the attendants were very helpful.

Smooth flight, easy boarding process. Made up time in the air with initial delay due to weather pass through

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

My experience on this United Airlines flight was highly uncomfortable, primarily due to two issues: Cabin Temperature: The temperature on the Boeing 737 MAX 8 was unacceptably high, feeling consistently around 80 degrees throughout the flight. This made sleeping impossible and significantly detracted from the experience. Seating Arrangement: Being stuck in a middle seat for a six-and-a-half-hour overnight flight compounded the discomfort. Moving forward, I will always purchase a seat assignment to avoid this situation.

I was truly shocked at how poor this flight went. The crew was not friendly during the checking process. The asked for people to gate check and were rude about it. They didn't handle my luggage with care. When I got to my seat I noticed a large section of the ceiling vent area was, no joke, TAPED TOGETHER WITH CLEAR PACKING TAPE! To add insult to injury, the back rest button was disabled on my seat and all the seats I could see. The wifi, never connected for me, despite troubleshooting it for a while. I did everything from restarting my wifi/phone to forgetting the network and restarting the app. But that didn't stop the mandatory 2 ads from playing every single time. Even the bags took over 45 mins to arrive at the carousel. Everything about this flight was a flop and I am beginning to notice that some of these events are becoming a trend. Perhaps it's time I switch loyalty programs.

Flight delayed 6 hours. Would mean I would miss My connections to Glasgow and my reason for going back. AA staff were completely useless in figuring out how to re ok me. My wife 200 miles away was on kayak offering suggestions. Also NO alerts from AA by phone or text about this delay. Just a $12 voucher for compensation. I ended up on BA

Little communication with passengers after sitting over 1 hour for a maintenance issue Then we had to deplane- no crew communication Poor gate information after deplaned WiFi would not connect AT ALL

American was the airline that Starlux contracted for this trip. I arrived in time to make the connecting flight on American, and then the baggage-handler debacle happened. For some reason, the first class and premium economy passengers' luggage was unloaded first. Never seen this happen before. They had handlers removing the bags from the carousel for those passengers. Meanwhile, all of the economy passengers were waiting for their bags, including me. And there were a lot of bags because it was an international flight packed full. While waiting for 45 minutes, my bag didn't show. Meanwhile, an American representative showed up asking if anyone has a connecting flight to Phoenix. Of course I spoke up, and they proceeded to try to find my bag because I had to take a bus to the actual terminal to catch my flight. Which I was not informed of before I arrived. After another 15 minutes of searching, my bag was finally found with the first-class passengers' bags because they had pulled it by mistake. So I rushed to the terminal with the American representative to catch my flight, and they informed me that I missed it and could not get another flight until the next day. Of course, after being on an international flight for 18 hours, I was in no mood to hear this. Now, to be fair, there were a few American employees who tried to help me. After hearing about the missed flight, they got a supervisor to talk to. I expressed my situation to the supervisor, and she was not helpful until I asked for compensation. She agreed to get me a hotel room for the night. So I agreed, and she disappeared into her office, and I waited. And waited. And waited. And waited. While waiting, I was asked by three different employees who knew of my situation if I had been helped. I told them I was waiting for the supervisor to get the hotel room, and they said they would check. Finally, after waiting for 75 minutes, one of the employees who had asked me if I had been helped arrived with my hotel room and arranged a ride to the hotel for me. Never saw the supervisor again. It was now 8 o'clock; I arrived at 5:45! My rebooked fight was scheduled for 6:11 this morning and I have now been informed it has been delayed until 10:00. So am I happy with American? NO I'M NOT!! ;

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

The flight was on time and arrived early. The crew were friendly and helpful.

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

VERY disappointed at the agent checking in my luggage. I know that the weight limit is 23 kg, a little over 50 pounds (50.71 pounds). Yet the agent kept repeating "50 pounds". So I said, the limit is 23 kg, and she had the audacity to say 'no, it is 22 kg!" Imagine my surprise. Was she ignorant or was she poorly trained? Not sure. The boarding process was pretty good. The speakers were loud enough so I still could hear them despite inconsiderate passengers continuing to speak while the announcements were going on. During the flight, the teenage girl sitting behind me kept pressing her feet to the back of my chair. I turned around several times, yet she did not get the hint. I did not make a fuss since I sense I had a bad streak that night with AA, so I just did the best I can to lean forward and not let that bother me.

It was wonderful upgrading to first. Plane was so cold thou. Crew was great. Wish there was a food option in first for such a long flight. Doesnt matter the time of day. Chintzy.

Staff are the rudest in the industry … awful customer service … will never fly Avianca again

Here we have another airline flying to Guatemala but doesn't have a plus or a less, just in the middle. Why? Well, first we don't have even free water Movie selection is poor Seats don't recline in some places Food selection is carb based Forgot to mention, customer service on the web is the worst. Good things; Very reliable on schedule Kind crew

I had to go to the boarding counter for them to enter my return flight as it’s not with Avianca. There was a long queue as there were lots of people being called to the counter.

Boarding, crew were excellent, food was ok and entertainment need to improve

There isn't much space in-between seats and even water needs to be paid for during the flight.

We were not aware carry-on bags cost extra until we arrived at the airport so, we were charged $240.00 for two small carry- on bags! There was a substantial fee for drinks and snacks. No wifi, or other entertainment was available. Waiting areas were crowded and uncomfortable.

Ok, but these people don’t give you nothing no snack no water

No water for a 5 hour flight entertainment not working seats with little room for knees when person in front of me reclined kept bumping my knees.

Awful. I checked in online and there was no option to pay for baggage, at the airport when I checked in my baggage was received and Iwas not charged. When I got to LA during the boarding process I was told I didn't pay for baggage, the crew resolved I was let in the plane. When I got to my final destination my baggage was not there. It took me two days to receive my baggage. Bad service ever!

There was no food or drink service, couldn’t even get a glass of water for free. It was a long and expensive flight to not offer food or beverage on the plane.

More options for your flight from Ontario to Costa Rica

Complete your trip to Costa Rica with a hotel stay or car rental