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ONT - SJO

$121 Find cheap flights from Ontario to San José, San José Province

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 5/17. 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
Thu 6/6
Thu 6/13

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 43,707,506 times on KAYAK, and here is why:

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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
11:30 pm - 8:40 amONT-SJO
8h 10m1 stop
6:10 am - 10:00 pmSJO-ONT
16h 50m2 stops
$317Avianca
Find Deal
Mon, Sep 9 - Mon, Sep 23
11:30 pm - 11:25 amONT-SJO
10h 55m1 stop
1:30 pm - 10:00 pmSJO-ONT
9h 30m1 stop
$335Avianca
Find Deal
Sat, Sep 28 - Thu, Oct 10
4:35 pm - 8:46 amONT-SJO
15h 11m1 stop
10:11 am - 10:14 pmSJO-ONT
37h 03m2 stops
Fri, May 17 - Tue, May 21
6:00 am - 10:39 pmONT-SJO
15h 39m1 stop
7:55 am - 9:11 pmSJO-ONT
14h 16m1 stop
$482United Airlines
Find Deal
Wed, Jul 24 - Wed, Jul 31
12:49 pm - 10:35 pmONT-SJO
8h 46m1 stop
11:59 pm - 10:03 amSJO-ONT
11h 04m1 stop
$502American Airlines
Find Deal
Thu, Jun 13 - Wed, Jun 19
12:55 pm - 8:46 amONT-SJO
18h 51m2 stops
9:36 am - 10:14 pmSJO-ONT
13h 38m1 stop
Mon, May 20 - Mon, May 27
7:16 pm - 10:08 pmONT-SJO
25h 52m2 stops
2:25 pm - 9:56 amSJO-ONT
20h 31m2 stops
$540American Airlines
Find Deal
Mon, Aug 5 - Tue, Aug 13
6:00 am - 10:03 amONT-SJO
27h 03m1 stop
5:30 am - 9:11 pmSJO-ONT
16h 41m1 stop
$565United Airlines
Find Deal
Mon, Aug 5 - Wed, Aug 14
10:59 pm - 11:53 amONT-SJO
11h 54m1 stop
1:13 pm - 10:28 pmSJO-ONT
10h 15m1 stop
$567Delta
Find Deal
Wed, Oct 2 - Tue, Oct 8
10:59 pm - 11:53 amONT-SJO
11h 54m1 stop
1:13 pm - 7:22 pmSJO-ONT
31h 09m1 stop
$580Delta
Find Deal
Wed, Oct 2 - Mon, Oct 7

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 Tuesdays 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 April, where tickets cost $334 on average. On the other hand, the most expensive months are December and July, where the average cost of tickets is $589 and $492 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 1 week before departure. For the absolute cheapest price, our data suggests you should book 81 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 ($151) and American Airlines ($283), and the lowest round-trip tickets were found on Avianca ($317) and United Airlines ($482).

Good to know

Low season

October

High season

November

Cheapest flight

$121
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly and prices are also 21% lower on average.
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 $121 for a one-way ticket and $317 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, oneworld, and SkyTeam 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 $392 and an overall rating of 7.4, 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.
7.4
AviancaOverall score based on 3835 reviews
7.4Comfort
7.9Crew
6.3Food
6.8Entertainment
7.7Boarding
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.

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

Due to one crew member not showing up to work, our flight was significantly delayed causing us to miss our connecting flight in Houston to Mississippi causing us to be delayed by more than 6 hours and missing our event all together. Very disappointing. All because ONE crew member called in sick. United did grant us a $15 meal voucher, which was a small but appreciated concession that I wasn’t able to use because I ordered my lunch and paid for it before applying the concession, and the staff said it was too late to use it. Ugh! We also had a TWO delay coming back from Mississippi, but that was on American Airlines and it was due to weather, so not their fault. Anyway, not at all impressed with United’s handling of our flight and the HUGE disappointment of missing our important family event for our 90 year old mother. All that money and all that stress and emotions for nothing. Having to wait the hour to bring an employee from LAX seemed like something that should not have happened. Why don’t you have a local back-up? Santa Ana is not a little airport in a rural area.

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

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

Not sure why JAL partnered with American Airlines because their service is no where near similar. Flight attendants were not friendly and didn’t smile. Food was horrible…

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Comfort of seats, ease of boarding. Food selection could be better

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.

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.
5/17Fri
2 stops
32h 42mONT-SJO
$121
5/18Sat
1 stop
14h 54mONT-SJO
$132
9/21Sat
1 stopAvianca
10h 55mONT-SJO
$151
9/1Sun
2 stopsAvianca
22h 20mONT-SJO
$154
8/21Wed
2 stopsAmerican Airlines
12h 01mONT-SJO
$283
5/16Thu
2 stopsAmerican Airlines
15h 11mONT-SJO
$285
6/14Fri
1 stopUnited Airlines
15h 39mONT-SJO
$327
10/8Tue
2 stopsUnited Airlines
13h 22mONT-SJO
$328
6/4Tue
2 stopsCopa Airlines
16h 54mONT-SJO
$336
6/26Wed
2 stopsCopa Airlines
16h 54mONT-SJO
$348

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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.
5/10Fri
multi-stopAmerican Airlines
8h 24mONT-SJO
5/18Sat
multi-stopAmerican Airlines
11h 06mSJO-ONT
$664
5/10Fri
multi-stopUnited Airlines
13h 22mONT-SJO
5/18Sat
multi-stopUnited Airlines
13h 58mSJO-ONT
$755
5/11Sat
multi-stopUnited Airlines
13h 22mONT-SJO
5/14Tue
multi-stopUnited Airlines
13h 58mSJO-ONT
$809
5/11Sat
multi-stopAvianca
10h 55mONT-SJO
5/13Mon
multi-stopAvianca
13h 25mSJO-ONT
$825
5/11Sat
multi-stopAvianca
10h 55mONT-SJO
5/14Tue
multi-stopAvianca
13h 25mSJO-ONT
$835
5/10Fri
multi-stopUnited Airlines
12h 37mONT-SJO
5/12Sun
multi-stopUnited Airlines
13h 58mSJO-ONT
$880
5/10Fri
multi-stopUnited Airlines
13h 22mONT-SJO
5/13Mon
multi-stopUnited Airlines
13h 58mSJO-ONT
$900
5/9Thu
multi-stopAvianca
10h 55mONT-SJO
5/16Thu
multi-stopAvianca
13h 25mSJO-ONT
$948
5/10Fri
multi-stopDelta
12h 44mONT-SJO
5/18Sat
multi-stopDelta
35h 32mSJO-ONT
$1,126
5/9Thu
multi-stopAmerican Airlines
12h 12mONT-SJO
5/15Wed
multi-stopAmerican Airlines
11h 06mSJO-ONT
$1,270

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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: