C$ 171 Find Cheap Flights from San Jose 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 Jose to Ontario departing on 3/9. 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

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 Jose 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 Jose to Ontario, as well as popular online travel agencies
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Best Ontario Flight Deals from San Jose

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Ottawa
Ottawa3 stopsC$ 506
London
London3 stopsC$ 722
Ottawa
Ottawa3 stopsC$ 506
London
London3 stopsC$ 722

Cheap Flights from San Jose to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Jose 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 Jose to Ontario

Thu, 24 Jul - Tue, 29 Jul
 Logo
6:30 a.m. - 7:59 p.m.SJC-YYZ
10h 29m1 stop
 Logo
11:00 a.m. - 11:54 p.m.YYZ-SJC
15h 54m2 stops
C$ 416
Find Deal
Thu, 24 Jul - Mon, 28 Jul
 Logo
6:30 a.m. - 7:59 p.m.SJC-YYZ
10h 29m1 stop
 Logo
12:00 p.m. - 10:36 a.m.YYZ-SJC
25h 36m2 stops
C$ 417
Find Deal
Sat, 28 Jun - Fri, 11 Jul
Delta Logo
6:35 a.m. - 9:59 p.m.SJC-YYZ
12h 24m1 stop
Delta Logo
6:30 a.m. - 12:39 p.m.YYZ-SJC
9h 09m1 stop
C$ 555Delta
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Mon, 30 Jun - Tue, 8 Jul
Delta Logo
4:59 p.m. - 11:18 a.m.SJC-YYZ
15h 19m2 stops
Delta Logo
1:04 p.m. - 8:26 p.m.YYZ-SJC
10h 22m1 stop
C$ 568Delta
Find Deal
Sat, 6 Sep - Sat, 13 Sep
Alaska Airlines Logo
6:40 a.m. - 3:00 p.m.SJC-YYZ
29h 20m2 stops
Alaska Airlines Logo
4:45 p.m. - 9:58 a.m.YYZ-SJC
20h 13m2 stops
C$ 579Alaska Airlines
Find Deal
Sat, 4 Oct - Sat, 11 Oct
United Airlines Logo
12:30 p.m. - 10:48 p.m.SJC-YYZ
7h 18m1 stop
United Airlines Logo
5:14 p.m. - 9:52 a.m.YYZ-SJC
19h 38m2 stops
C$ 583United Airlines
Find Deal
Sat, 11 Oct - Thu, 16 Oct
United Airlines Logo
8:45 a.m. - 10:48 p.m.SJC-YYZ
11h 03m1 stop
United Airlines Logo
11:00 a.m. - 10:24 p.m.YYZ-SJC
14h 24m1 stop
C$ 593United Airlines
Find Deal
Mon, 8 Sep - Mon, 22 Sep
Alaska Airlines Logo
6:30 p.m. - 3:00 p.m.SJC-YYZ
17h 30m1 stop
Alaska Airlines Logo
4:45 p.m. - 9:11 a.m.YYZ-SJC
19h 26m1 stop
C$ 626Alaska Airlines
Find Deal
Thu, 21 Aug - Mon, 25 Aug
American Airlines Logo
7:17 p.m. - 2:54 p.m.SJC-YUL
16h 37m2 stops
American Airlines Logo
4:05 p.m. - 6:27 p.m.YUL-SJC
29h 22m2 stops
C$ 774American Airlines
Find Deal
Fri, 11 Jul - Mon, 28 Jul
American Airlines Logo
11:24 p.m. - 2:45 p.m.SJC-YUL
12h 21m1 stop
American Airlines Logo
3:40 p.m. - 10:46 p.m.YUL-SJC
10h 06m1 stop
C$ 993American Airlines
Find Deal
Useful Info

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Jose 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 Jose to Ontario is May, when tickets cost C$ 521 (return) on average. On the other hand, the most expensive months are December and August, when the average cost of round-trip tickets is C$ 854 and C$ 738 respectively.

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

The average price of all round-trip flights from San Jose to Ontario clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Ontario on a Wednesday and more expensive on a Sunday. On your return trip to San Jose, you should consider flying back on a Wednesday, and avoid Sundays for better deals.

How far in advance should I book a flight from San Jose 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 Jose 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 Jose to Ontario, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.


Good to know

Low seasonFebruary
High seasonAugust
Cheapest flightC$ 171
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly (11% more expensive on average)
Flight from San Jose to Toronto

FAQs - booking Ontario flights

  • How does KAYAK find such low prices on flights from San Jose 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 Jose to Ontario.

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

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

  • What is the Hacker Fare option on flights from San Jose 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 from San Jose to Ontario with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Jose 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 from San Jose to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Ontario?

    The cheapest time of day to fly to Ontario is generally in the evening, when round-trip flights cost C$ 442 on average. Morning departures are around 1% more expensive than evening flights, on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is C$ 448.

Reviews of the top airline flying from San Jose to Ontario

 
See real verified KAYAK customer reviews for airlines flying from San Jose 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 Jose 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 8810 reviews
7.7Boarding
8.1Crew
7.0Entertainment
7.3Comfort
6.6Food
Airline reviews

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

2.0 MediocreAnonymous, Jun 2025LAX - SEA
Read more United Airlines reviews

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

The food was the worst I’ve had on any flight I’ve ever been on.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Breakfast was not loaded at SFO due to catering company change. Seems like a major airline at a major hub would have thought of something else or warned passengers to pick up food before boarding a 3 hour flight.

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

They hired a new catering company the same day of my flight. They botched the job by not delivering the right carts and after THREE HOURS waiting, the flight crew timed out (flight was 19 hours long and FAA rules state crew can’t work more than 14 hours long). So they CANCELED OUR FLIGHT!! Worst experience ever. Avoid UAL at all costs.

The personnel were professional and friendly. The Boeing 737 Max 9 is too claustrophobic and was very warm at both airport gates, and still warm in the air.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

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

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