SJO - ONT

$245 Find Cheap Flights from San José to Ontario

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 6/29. 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
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San José to Ontario, 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 San José to Ontario, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

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

Everything you should know

Cheapest round-trip
$517
Typical prices: $450-$374
Southwest
Wed 9/16Wed 9/23
SJO - ONT • 1 stop
Cheapest one-way
$245
Typical prices: $221-$295
Multiple Airlines
Mon 6/29
SJO - ONT • 2 stops
Top airlines
Cheapest • from $517 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between San José and Ontario. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $351 (round-trip)
Shortest trip • 8h 38m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 22% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
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, Sep 16 - Wed, Sep 23
Southwest Logo
1:40 pm - 10:05 pm
SJO
-
ONT
9h 25m
1 stop
Southwest Logo
4:45 pm - 12:45 pm
ONT
-
SJO
19h 00m
2 stops
$517Southwest
Wed, Sep 16 - Wed, Oct 14
Southwest Logo
1:40 pm - 10:05 pm
SJO
-
ONT
9h 25m
1 stop
Southwest Logo
4:40 pm - 6:00 am
ONT
-
SJO
12h 20m
1 stop
$546Southwest
Wed, Sep 16 - Wed, Oct 14
Southwest Logo
1:40 pm - 10:05 pm
SJO
-
ONT
9h 25m
1 stop
Southwest Logo
3:50 pm - 6:00 am
ONT
-
SJO
13h 10m
2 stops
$551Southwest
Tue, Sep 1 - Thu, Sep 10
Southwest Logo
1:40 pm - 10:05 pm
SJO
-
ONT
9h 25m
1 stop
Southwest Logo
6:10 am - 6:40 pm
ONT
-
SJO
11h 30m
2 stops
$554Southwest
Tue, Sep 15 - Tue, Oct 20
Southwest Logo
1:40 pm - 10:05 pm
SJO
-
ONT
9h 25m
1 stop
Southwest Logo
2:35 pm - 6:00 am
ONT
-
SJO
14h 25m
1 stop
$568Southwest
Thu, Aug 27 - Sun, Aug 30
Southwest Logo
9:00 am - 8:40 pm
SJO
-
ONT
12h 40m
2 stops
Southwest Logo
8:35 pm - 12:45 pm
ONT
-
SJO
15h 10m
2 stops
$569Southwest
Tue, Sep 15 - Tue, Oct 20
Southwest Logo
1:40 pm - 10:05 pm
SJO
-
ONT
9h 25m
1 stop
Southwest Logo
4:55 pm - 6:00 am
ONT
-
SJO
12h 05m
2 stops
$573Southwest
Tue, Sep 15 - Mon, Sep 21
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
$584Multiple Airlines
Fri, Oct 2 - Sun, Oct 11
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
$587Multiple Airlines
Thu, Jun 18 - Tue, Jul 7
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
$588Multiple 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 September.

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 $322 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $498 and $490 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$245
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 6% increase in price.
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 7 days, the lowest price for a flight from San José to Ontario was $245 for a one-way ticket and $517 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 $386 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 9757 reviews
7.1Entertainment
6.6Food
7.3Comfort
8.1Crew
7.7Boarding
Airline reviews

Uncomfortable plastic seats even in premium economy. No free wifi. Even paid wifi was spotty to nonexistent. Bad food. Much worse than economy on foreign carriers like Qantas.

4.0 Okayziv, May 2026
SYD - LAX
Read more United Airlines reviews

Uncomfortable plastic seats even in premium economy. No free wifi. Even paid wifi was spotty to nonexistent. Bad food. Much worse than economy on foreign carriers like Qantas.

How can you rate a flight when it is canceled after you leave the gate & 3 hours into sitting there or in remote area of airport after mechanical problems

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

6 1/2 hours from Tampa to SFO on a Boeing 737. Cramped. No Service. No real food. One pass for coffee at the beginning and a second pass THREE hours later. And check-in in Tampa was nasty even by United standards. And I am at almost TWO million miles on United. It's a non-stop. But terrible service.

First class ticket gets you no seat back entertainment? I have to bring my own laptop to see a movie? And most of their movies have ADS? No thank you. Worse: Tiny snacks only on a 2 hr flight?

The flight to Houston the agents were not very helpful

Late plane. Only one crew on the ground so we b had to wait for Denver flight to come in, board, and depart. At 78 yrs of age I was not pleased trying to get my connection. What really made me angry was the notification you sent me to hurry up or I would miss my connection. Why tell me to hurry up when you got me in late. It was not a good way of treating customers.

No complaints other than luggage carousel was incorrectly guiding passengers to the wrong carousel on the screen.

Seats were not super comfortable and food was not good at all. If I had a chance I would definitely fly a different airline. Of course they are better than any budget airline, but not by much.

Flew steerage class. Short on leg room unless you pay more. No window unless you pay more. Etc. United is trying to squeeze every cent from you. It doesn’t make for any loyalty.

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

The crew was great! They waited for me as Air Canada flight was delayed by 1:15 hours from Ottawa to Toronto. I am a bit disappointed that we could only use wifi for entertainment but I survived! The only thing I would of liked is a more comfortable seat. The seat cushions are not thick enough for flights longer than 3 hours. Aside from that, everything was great.

Overall, the flight went well and the service was good. However, there was a very frightening moment during landing in Bogotá. Just as the plane was about to touch down, it suddenly went back up into the air. The aircraft was not descending straight and seemed to move left and right, which made the situation feel unstable. This was quite scary. After going back up, the plane circled for about 15 minutes before attempting to land again. Although I understand that safety always comes first and situations like this can happen, it was still a shocking experience for passengers.

Horrible experience with Avianca, they delayed their flight and when we arrived to NYC, AVIANCA took 1 hr y 30 mins to park the airplane and all passenger get off the plane, it made me lost all my trains to get back home and I came back to my place at 3 am instead of 12 am. On the top of that their plane seat are so uncomfortable and is not enough space and killed my legs and knees, Avianca used to be good when it was a Colombian company, now after Brasilian company bought them, their service quality is bad and their flights are delayed and oversold.

I handed in my suitcase in perfect condition at SAL Airport. And in MIA Airport I received it with one corner broken and the wheels bent.

I like the crew members they're very friendly. Clean plane. The flight was on time. I dont like the comfort my car seat its better that the plane seats. They charge for everything. This airline was very good. Now it's a low cost airline

No free snacks nor drinks on very short 30min flight. Entertainment system is over wifi to your own phone or tablet, which is good but often a show or movie just stops and refuses to continue

6 hour flight and have to pay for everything 100 dollars to add a carry-on bag is insane

Horrible experience. Flight cancelled. Arrived at destination 12 hs later. No one gave us an answer or any information. Very very poor service. We won’t ever travel again with Avianca

Usb plugs for charging your phone does not work in every flight. uncomfortable chairs even in higher categories.

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

Information on your arrival and departure airports