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ONT - SJO

Find cheap flights from Ontario to San José from $134

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to San José departing on 4/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 5/18
Sat 5/25

Search hundreds of travel sites at once for deals on flights to San José

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to San José, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to San José, as well as popular online travel agencies
In the last 7 days travelers have searched 44,553,814 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

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Filter your dealsChoose cabin class, free Wi-Fi and more.

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Cheap flight deals from Ontario to San José (ONT-SJO)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to San José that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
4:52 pm - 8:46 amONT-SJO
14h 54m1 stop
9:36 am - 10:14 pmSJO-ONT
13h 38m1 stop
Sat, May 18 - Wed, May 22
4:52 pm - 8:46 amONT-SJO
14h 54m1 stop
9:36 am - 10:27 pmSJO-ONT
13h 51m1 stop
Sat, May 18 - Sat, May 25
4:35 pm - 8:46 amONT-SJO
15h 11m1 stop
9:36 am - 10:14 pmSJO-ONT
13h 38m1 stop
Fri, May 17 - Wed, May 22
4:31 pm - 8:46 amONT-SJO
15h 15m1 stop
9:36 am - 10:14 pmSJO-ONT
13h 38m1 stop
Mon, May 20 - Wed, May 22
4:35 pm - 8:46 amONT-SJO
15h 11m1 stop
9:36 am - 10:27 pmSJO-ONT
13h 51m1 stop
Fri, May 17 - Sat, May 25
11:30 pm - 11:25 amONT-SJO
10h 55m1 stop
9:35 am - 10:00 pmSJO-ONT
13h 25m1 stop
$301Avianca
Find Deal
Sat, May 18 - Sat, May 25
11:30 pm - 11:25 amONT-SJO
10h 55m1 stop
4:25 pm - 10:00 pmSJO-ONT
30h 35m2 stops
$313Avianca
Find Deal
Sat, May 18 - Sat, May 25
6:00 am - 10:39 pmONT-SJO
15h 39m1 stop
5:30 am - 9:14 pmSJO-ONT
16h 44m1 stop
$572United Airlines
Find Deal
Mon, May 27 - Fri, May 31
8:50 pm - 10:39 pmONT-SJO
24h 49m2 stops
5:30 am - 12:25 pmSJO-ONT
31h 55m2 stops
$577United Airlines
Find Deal
Sun, May 26 - Fri, May 31
10:29 pm - 12:50 pmONT-SJO
13h 21m2 stops
6:15 am - 8:08 pmSJO-ONT
14h 53m2 stops
$611American Airlines
Find Deal
Tue, May 7 - Sat, May 11

Flights from Ontario to San José - Travel Insights & Trends

Get data-powered insights and trends into flights from Ontario to San José to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ontario to San José?

The average price of all flights from Ontario to San José, San José Province clicked on KAYAK for each day over the last 12 months.
When flying from Ontario to San José, you should consider leaving on a Saturday and avoid Wednesdays if you are looking for the best rates. For your return to Ontario, you’ll find the best rates on Mondays and the most expensive ones on Sundays.

What is the cheapest month to fly from Ontario to San José, San José Province?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Ontario to San José, San José Province, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Ontario to San José, San José Province is September, where tickets cost $349 on average. On the other hand, the most expensive months are December and November, where the average cost of tickets is $669 and $509 respectively.

How far in advance should I book a flight from Ontario to San José, San José Province?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Ontario to San José, San José Province, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Ontario to San José, San José Province, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 73 days before departure.

Which airlines provide the cheapest flights from Ontario to San José?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest one-way tickets to San José from Ontario were found on Avianca ($134) and Delta ($285), and the lowest round-trip tickets were found on Avianca ($301) and United Airlines ($572).

Good to know

Low season

October

High season

March

Cheapest flight

$134
Best time to beat the crowds with an average 35% drop in price.
Most popular time to fly with an average 50% increase in price.
Flight from Ontario to San José

When to book flights from Ontario to San José

Are your dates flexible? Find out the best times to travel from Ontario to San José based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to San José

  • What is the cheapest flight from Ontario to San José, San José Province?

    In the last 3 days, the lowest price for a flight from Ontario to San José, San José Province was $134 for a one-way ticket and $245 for a round-trip.

  • Do I need a passport to fly between Ontario and San José?

    A passport is required to fly from Ontario to San José.

  • Which aircraft models fly most regularly from Ontario to San José?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to San José?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Ontario and San José, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to San José, Avianca or United Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to San José are Avianca and United Airlines. With an average price for the route of $404 and an overall rating of 7.5, Avianca is the most popular choice. United Airlines is also a great choice for the route, with an average price of $487 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Ontario to San José?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to San José.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to San José?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San José from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to San José?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San José with an airline and back to Ontario with another airline. Booking your flights between Ontario and SJO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to San José?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San José from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 3 airlines serving from Ontario to San José

 
See real verified KAYAK customer reviews for airlines flying from Ontario to San José. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to San José? 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.
7.5
AviancaOverall score based on 3977 reviews
6.9entertainment
6.4food
8.0crew
7.7boarding
7.4comfort
Airline reviews

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.

8.0 ExcellentAnonymous, Apr 2024LAX - SAL
Read more about Avianca reviews

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.

I don't think anyone actually reads these comments, so I won't spend much time on this submission. If you want to talk, you know how to reach me. The D/FW manager of Avianca (self-identified), Juan Calderon, insisted I buy an onward ticket from San Salvador even though I have diplomatic status in El Salvador and live here. It cost me $1,393 and Mr Calderon would not let me make the ticked flexible so I could get a refund. He went out of his way to be rude to me. He gave me seat 32K -- windowless window seat in the last row and did not offer to let me upgrade even though there were plenty of seats. I have flown well over a million miles in my life and this is the worst experience I have ever had. I would like a refund on the ticket I was forced to buy. Just awful!

This is the Spirit of Latino travel. And don’t even get me started on customer service.

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.

It is better at the jfk than my home country. It was very easy and everything was on time.

There is no food. There is no in-inflight entertainment. The seats are cardboard. The airline is a living hellscape.

My experience was amazing! They helped my elderly mother board on early through a wheelchair and were accommodating to have us sit together since our seats were in different locations. When landing at the airport in GUA they were very helpful with full of hospitality.

No complimentary snacks food, beverage (not even water), pillow and blanket on a 6 hours long flight (including economy comfort). A low form of nickeling an diming. Lost a recurring passanger over a soda. Avianca never again.

Flight departure late. Got late in Colombia making us take a different flight next day. Avianca airport crew messed up my ticket so when a I got in Brazil I didn’t have a ticket for my destination. Had to buy a new ticket out of my pocket.

Hated every minute of it. This flight should have only taken 1.5hrs but was delayed over 10hours. Now I am being told I cannot be compensated or refunded my ticket price or extra leg room, which I purchased but did not receive, because the airline is throwing the blame on the 3rd party I purchased tickets through and 3rd party putting the blame on airline. No one wants to help. They received their money and that's all they care about. Im going on 3 days of still trying to get to my final destination, had to cancel car rental, car insurance and hotel. Currently staying in airport until hotels open up. Thank you Lufthansa, Kayak, Underpricer and United for making this trip the worst ever.

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.

Awful. I got stuck next to a person carrying a dog and behind someone with a dog. People need to board these dogs downstairs. The cabin is crowded enough with your pets

Packed in like sardines, very uncomfortable. Sitting the aisle my shoulder was rammed into numerous times by rushing flight attendants. Also flight was very cold.

the head jack on my seat didn't work and the power outlet didn't work for my seat

Beverage and food services are excellent. We enjoy paying the extra for economy plus for the 3 inches more leg room to be exact.

Left 2 hours later for delayed I had to take care a kid with special need since people don’t want to move to accommodate the rest of the family. . It wasn’t bad but that made me upset that people can be that selfish.

Flight was delayed by 3 hours. The pilot made up 1 hour during the flight, but that made the wait at the airport 5 hours once you factor getting there 2 hours early.

For a 22 minute flight all you expect is for it to be safe and comfortable

Food options were limited which is absolutely embarrassing for a Flight of this size The staff did not come around as much and I am not accustomed to such poor service from American Airlines Drinks I believe were limited to soda and water

Crew were attentive and friendly. Flight was smooth and early! I enjoyed the less crowded plane. Thank you!

We are gluten free, there were not any available complimentary gluten free options.

No meal on a cross country flight? SFO-MiA is pretty much the definition of a coast to coast flight. No meal provided. Sky high wi-fi rates too. Stop nickel and diming your customers.

The staff was unprofessional and didn’t communicate very well. The boarding process was very disheveled, potentially due to a power outage the previous day but there was no contingency plan to properly get passengers boarded the following day. Once boarded the aircraft stayed on the tarmac for over 45 minutes due to high winds. The communication was sporadic but an announcement was finally made an additional 30 minutes later that the flight was cancelled but we couldn’t get off the plane. Prior to deplaning one of the gate agents came on the plane and made an announcement for everyone to pickup their checked bags and take a card to rebook a new reservation because they didn’t have adequate staff. Flights were missed, passengers went to different airports and there was little to no assistance from AA.

You cancelled my flight by email then made it very difficult to get in contact with you. Then put me in a flight with a long layover in Mexico returning to the wrong airport in uk. Mind blowing my stressful. I missed see my grand dad because of you.

Apart from the delay due to unforeseen circumstances. The leg from sjc to dfw was fine. It was the leg from dfw to orf that we encountered issues mainly due to the flight attendant crew not being friendly. We had two small children and we needed some assistance to warm up milk so the baby would sleep. The crew just didn’t get it and made things very difficult. One made a remark that the baby’s dirty diaper smell was a “gift” to the plane in a rude way. Normally I’d brush that off as a funny comment if the rest of the trip the attendants were helpful or understanding of the difficulty we faced. But that wasn’t the case. We were met with rudeness on the second leg. Whereas on the first leg the crew were so nice and helpful.

This was not the BA business class it used to be. Mediocre food, attendants seemed stretched thin. All the little luxuries that used to make BA business fun were missing. Flight delayed and the explanation given was they forgot to pick up crew - I hope I misheard! Transfer in LHR “sticky” - we thought we had way too much time at 3hours but it was needed. Next time will try different route.

Flight From PHX to CVG was on time, very professional staff

The food at Admirals Club was really great Pijamas were a nice feature The flight attendant was very nice and great attitude The aa.com does not work well specially internet service Overall a very good flight .

Book cheap flights from Ontario to San José

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Ontario to San José found on KAYAK in the last 72 hours.
4/29Mon
1 stopAvianca
8h 10mONT-SJO
$134
5/18Sat
1 stopAvianca
10h 55mONT-SJO
$135
6/11Tue
2 stops
28h 02mONT-SJO
$231
6/11Tue
3 stops
27h 08mONT-SJO
$247
4/26Fri
1 stopDelta
12h 52mONT-SJO
$285
4/26Fri
2 stopsDelta
17h 33mONT-SJO
$291
4/26Fri
2 stopsUnited Airlines
12h 37mONT-SJO
$325
4/26Fri
2 stopsUnited Airlines
12h 37mONT-SJO
$330
5/20Mon
1 stopAmerican Airlines
12h 12mONT-SJO
$350
5/17Fri
2 stopsAmerican Airlines
19h 26mONT-SJO
$354

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Last minute flights from Ontario to San José

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Ontario to San José that are departing in the next 10 days.
4/23Tue
multi-stopAvianca
10h 55mONT-SJO
5/7Tue
multi-stopAvianca
9h 30mSJO-ONT
$375
4/22Mon
multi-stopAvianca
8h 10mONT-SJO
5/7Tue
multi-stopAvianca
9h 30mSJO-ONT
$395
4/23Tue
multi-stopAvianca
10h 55mONT-SJO
4/27Sat
multi-stopAvianca
13h 25mSJO-ONT
$423
4/20Sat
multi-stopAvianca
10h 55mONT-SJO
4/27Sat
multi-stopAvianca
13h 25mSJO-ONT
$447
4/21Sun
multi-stop
8h 10mONT-SJO
4/27Sat
multi-stop
11h 44mSJO-ONT
$676
4/20Sat
multi-stop
16h 52mONT-SJO
4/27Sat
multi-stop
13h 25mSJO-ONT
$771
4/20Sat
multi-stopUnited Airlines
14h 15mONT-SJO
4/27Sat
multi-stopUnited Airlines
13h 45mSJO-ONT
$809
4/19Fri
multi-stopUnited Airlines
14h 15mONT-SJO
4/23Tue
multi-stopUnited Airlines
12h 59mSJO-ONT
$825
4/20Sat
multi-stopAmerican Airlines
13h 46mONT-SJO
4/26Fri
multi-stopAmerican Airlines
15h 14mSJO-ONT
$1,270
4/20Sat
multi-stopAmerican Airlines
13h 46mONT-SJO
5/3Fri
multi-stopAmerican Airlines
13h 07mSJO-ONT
$1,279

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Ontario - San José Flights

Departure:

Ontario (ONT)United States

Destination:

San José (SJO)Costa Rica

Return flight deals:

San José - Ontario

Cabin classes: