SJO - ONT

$301 Find Cheap Flights from San José to Ontario - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San José to Ontario departing on 10/13. 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
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$483
Typical prices: $353-$479
Southwest
Wed 10/7Tue 10/13
SJO - ONT • 2 stops
Cheapest one-way
$301
Typical prices: $221-$284
Southwest
Tue 10/13
SJO - ONT • 2 stops
Top airlines
Cheapest • from $483 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between San José and Ontario. You'll need at least 1 connection.
Insights
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Insights
Top layover airports
Cheapest • Avg $429 (round-trip)
Shortest trip • 8h 38m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 26% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San José to Ontario (SJO-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San José to Ontario 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San José to Ontario

Wed, Oct 7 - Tue, Oct 13
Southwest Logo
1:00 pm - 10:00 pm
SJO
-
ONT
10h 00m
2 stops
Southwest Logo
7:30 am - 7:40 pm
ONT
-
SJO
11h 10m
2 stops
$483Southwest
Wed, Oct 14 - Wed, Nov 4
Southwest Logo
1:00 pm - 10:00 pm
SJO
-
ONT
10h 00m
2 stops
Southwest Logo
4:55 pm - 1:15 pm
ONT
-
SJO
18h 20m
2 stops
$518Southwest
Mon, Nov 23 - Tue, Dec 1
Southwest Logo
2:10 pm - 11:35 pm
SJO
-
ONT
11h 25m
2 stops
Southwest Logo
4:55 pm - 12:20 pm
ONT
-
SJO
17h 25m
2 stops
$538Southwest
Tue, Aug 18 - Tue, Aug 25
Multiple Airlines Logo
7:00 am - 11:05 pm
SJO
-
ONT
17h 05m
2 stops
Multiple Airlines Logo
9:36 pm - 9:56 pm
ONT
-
SJO
23h 20m
2 stops
$545Multiple Airlines
Fri, Aug 21 - Fri, Aug 28
Multiple Airlines Logo
7:00 am - 11:05 pm
SJO
-
ONT
17h 05m
2 stops
Multiple Airlines Logo
12:55 am - 9:56 pm
ONT
-
SJO
20h 01m
2 stops
$546Multiple Airlines
Mon, Aug 24 - Sun, Aug 30
Multiple Airlines Logo
7:00 am - 11:05 pm
SJO
-
ONT
17h 05m
2 stops
Multiple Airlines Logo
9:36 pm - 9:56 pm
ONT
-
SJO
23h 20m
2 stops
$549Multiple Airlines
Tue, Aug 18 - Sun, Aug 30
Multiple Airlines Logo
7:00 am - 7:46 pm
SJO
-
ONT
13h 46m
2 stops
Multiple Airlines Logo
9:36 pm - 9:56 pm
ONT
-
SJO
23h 20m
2 stops
$550Multiple Airlines
Fri, Aug 21 - Sun, Aug 30
Multiple Airlines Logo
7:00 am - 11:05 pm
SJO
-
ONT
17h 05m
2 stops
Multiple Airlines Logo
12:55 am - 9:56 pm
ONT
-
SJO
20h 01m
2 stops
$552Multiple Airlines
Sat, Aug 22 - Wed, Aug 26
Multiple Airlines Logo
7:00 am - 7:46 pm
SJO
-
ONT
13h 46m
2 stops
Multiple Airlines Logo
9:36 pm - 9:56 pm
ONT
-
SJO
23h 20m
2 stops
$555Multiple Airlines
Thu, Aug 20 - Fri, Aug 28
Multiple Airlines Logo
7:00 am - 11:05 pm
SJO
-
ONT
17h 05m
2 stops
Multiple Airlines Logo
12:55 am - 9:56 pm
ONT
-
SJO
20h 01m
2 stops
$563Multiple Airlines
Booking Insights

KAYAK's insights & trends for San José to Ontario flights

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

How much is a round-trip flight from San José to Ontario?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San José to Ontario departing in October.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San José to Ontario, 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 San José to Ontario is January, where tickets cost $327 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $617 and $555 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San José to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from San José to Ontario, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$301
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from San José to Ontario

When to book flights from San José to Ontario

Are your dates flexible? Find out the best times to travel from San José to Ontario 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 San José to Ontario

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

    In the last 5 days, the lowest price for a flight from San José to Ontario was $324 for a one-way ticket and $483 for a round-trip.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in San José and on arrival in Ontario.

  • Which airports will I be using when flying from San José to Ontario?

    San José airport is called San José Juan Santamaria Intl and the only airport in Ontario is Ontario.

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

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

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

    Star Alliance is the only airline alliance operating flights between San José and Ontario.

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

    The two airlines most popular with KAYAK users for flights from San José to Ontario are United Airlines and Avianca. With an average price for the route of $383 and an overall rating of 7.4, United Airlines is the most popular choice. Avianca is also a great choice for the route, with an average price of $430 and an overall rating of 6.5.

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

    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 San José to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from San José 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 San José to Ontario?

    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 Ontario with an airline and back to San José with another airline. Booking your flights between San José and ONT 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 San José to Ontario?

    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 Ontario from San José up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from San José to Ontario

 
See real verified KAYAK customer reviews for airlines flying from San José to Ontario. 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 San José to Ontario? 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 9986 reviews
7.7Boarding
7.1Entertainment
6.7Food
8.1Crew
7.3Comfort
Airline reviews

It was a short, comfortable flight. It did leave an hour late due to the pilot having to be replaced (family emergency) but that didn’t inconvenience myself & my friend. The situation was explained, eventually.

8.0 ExcellentCheryl, Jul 2026
SFO - SBP
Read more United Airlines reviews

It was a short, comfortable flight. It did leave an hour late due to the pilot having to be replaced (family emergency) but that didn’t inconvenience myself & my friend. The situation was explained, eventually.

There was a piece of plastic baked into my buttermilk biscuit! I have a pictures. The flight attendants in first class were really apologetic, and tried to rectify the situation. I I am very appreciative that they were able to give me some packets of pretzels and gummy bears. I understand they don't personally handle the food until warming it up so I know it wasn't their fault. I don't know whether it was a newer aircraft, or different food packaging, but I was happy that when the food was being warmed up - it didn't smell like plastic. Jokes on me with finding plastic in my food.

The seats were uncomfortable, as if the cushions haven't been switched out in many years. I felt like I was on an old bus. The food was delicious. thank you. Onboard entertainment, very limited. Unless you like violent movies. Why in the world would you have such severely violent movies on a plane? if you don't want to see such things, you don't have a choice. Have you considered that when choosing entertainment? Good god. Why would you have the Godfather? Or black women being brutally beaten with a club? Why in the hell would you put that kind of material on a plane? As for Kayak: Why when I ordered Qantas, was the plane on United?

The flight to Houston the agents were not very helpful

It was good, although we could not get our preferred seats, we did enjoy the whole experience from Costa Rica. I still don't understand why our luggage is not the first to come out at the band.

Movie selection is good. Crew did not understand mileage program and were no help. Sick later. Food?

I love United was disappointed we had a two hour delay, however the Pilot did say safety first.

Since when do I have to pay for my checked bag? I have a United Explorer mileage plus silver card and I was charged for my checked bags. This also is an international flight. So I would like an explanation to be clear before I choose an airline please?

Boarding was terrible. My wife uses a wheel chair and she was in an incredibly hot closed metal cargo box for close to 20 minutes before getting on board

Airline did not explain reasons why flight was delayed two hours. Explanations were badly needed and rarely provided. Problem seemed to clearly be the airline’s fault and not the fault of the weather or airport.

The employees at the gate were not communicating, they preferred to give the upgrade to pilots and not to the elite passengers Every flight I more disappointing, clients shooed be priority instead of other employees even if they are pilots, there was plenty room for pilots in economy

It was horrible. My experience with Avianca. I didn’t know it was Pakistan international Airlines but anyway, whatever it is it is bad horrible you guys need to upgrade everything in those planes. And you guys charge $130 for a carry-on did they wanna let me in with my carry-on that I travel everywhere with the luggage you guys are such a dog thank you

The incoming plane was late and no information was shared. They even announced we would board in 10 muntes 40 minutes prior to the plane arriving, and the website said until takeoff that we had taken off an hour earlier

The fees for baggage were outrageous. $130 for carry on and $150 for check in for an international flight. The seats did not recline. We were not even offered water. Had we known all of this, we would not have booked Avianca at all.

I was shocked flying to El Salvador that they only give you water. Everything else you have to pay for. There is no wifi or entertainment and it’s an international flight. At least back in the day they had tvs on the plane and everyone watched the same movie. Also seats do not recline, even comfort or plus.

I did not like anything, first time I use company and for sure it will be the last time, they charge for simple operations that any other average airline wouldn't charge.

The good thing is the flight was on time and the crew was really nice. They can work better the arriving with staff

The inflight entertainment did not work on a 6 hour flight The cel phone chargers did not work There was a 45 minute wait for the luggage to get off the plane.

They could offer free food and drink like other international flights.

Flight attendants to show up on time, offer drinks and food.

Everything you need to know for your flight from San José to Ontario

Information on your arrival and departure airports