$172 Find Cheap Flights from San Jose 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 Jose to Ontario departing on 8/25. 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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Cheap Flights from San Jose to Ontario

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Toronto
Toronto1 stop$375
Ottawa
Ottawa1 stop$601
London
London2 stops$743
Windsor
Windsor2 stops$701
Sudbury
Sudbury2 stops$998
Sault Ste Marie
Sault Ste Marie2 stops$770
Toronto
Toronto1 stop$375
Ottawa
Ottawa1 stop$601
London
London2 stops$743
Windsor
Windsor2 stops$701
Sudbury
Sudbury2 stops$998
Sault Ste Marie
Sault Ste Marie2 stops$770

Book Cheap San Jose to Ontario Plane Tickets

 
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

Sat, Oct 10 - Sat, Oct 17
Delta Logo
12:57 pm - 11:59 pm
SJC
-
YYZ
8h 02m
1 stop
Delta Logo
6:15 am - 11:47 am
YYZ
-
SJC
8h 32m
1 stop
$375Delta
Sat, Oct 10 - Sat, Oct 17
Delta Logo
5:42 pm - 11:56 am
SJC
-
YYZ
15h 14m
2 stops
Delta Logo
6:15 am - 11:47 am
YYZ
-
SJC
8h 32m
1 stop
$385Delta
Tue, Oct 27 - Sat, Oct 31
United Airlines Logo
6:30 am - 6:45 pm
SJC
-
YYZ
9h 15m
1 stop
United Airlines Logo
6:45 am - 12:00 pm
YYZ
-
SJC
8h 15m
1 stop
$395United Airlines
Mon, Aug 10 - Sun, Aug 16
Multiple Airlines Logo
2:12 pm - 5:09 pm
SJC
-
YYZ
23h 57m
1 stop
Multiple Airlines Logo
8:35 pm - 1:17 pm
YYZ
-
SJC
19h 42m
1 stop
$402Multiple Airlines
Mon, Oct 19 - Wed, Oct 21
United Airlines Logo
6:35 pm - 3:14 pm
SJC
-
YYZ
17h 39m
1 stop
United Airlines Logo
11:00 am - 8:48 pm
YYZ
-
SJC
12h 48m
2 stops
$404United Airlines
Sat, Aug 22 - Sat, Aug 29
Multiple Airlines Logo
6:00 am - 10:53 pm
SJC
-
YUL
13h 53m
2 stops
Multiple Airlines Logo
6:10 am - 11:45 am
YUL
-
SJC
8h 35m
1 stop
$461Multiple Airlines
Sat, Aug 22 - Sat, Aug 29
American Airlines Logo
2:30 pm - 2:44 pm
SJC
-
YUL
21h 14m
1 stop
American Airlines Logo
3:45 pm - 10:32 pm
YUL
-
SJC
9h 47m
1 stop
$525American Airlines
Wed, Aug 12 - Sat, Aug 29
WestJet Logo
7:21 am - 7:05 am
SJC
-
YUL
20h 44m
2 stops
WestJet Logo
7:15 am - 10:13 pm
YUL
-
SJC
17h 58m
2 stops
$529WestJet
Wed, Sep 30 - Sat, Oct 3
WestJet Logo
11:36 am - 7:05 am
SJC
-
YUL
16h 29m
2 stops
WestJet Logo
7:15 am - 5:18 pm
YUL
-
SJC
13h 03m
2 stops
$532WestJet
Wed, Aug 26 - Sat, Sep 19
American Airlines Logo
6:00 am - 10:53 pm
SJC
-
YUL
13h 53m
2 stops
American Airlines Logo
7:50 am - 6:29 pm
YUL
-
SJC
13h 39m
2 stops
$543American Airlines
Booking Insights

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.

How much is a round-trip flight from San Jose, California to Region of 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 Jose, California to Region of Ontario departing in October.

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 July, when tickets cost $145 (return) on average. On the other hand, the most expensive months are January and February, when the average cost of round-trip tickets is $505 and $375 respectively.

Good to know

Low seasonJanuary
Cheapest flight$172
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from San Jose to Toronto Pearson Airport

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 travelers 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.

Reviews of the top 3 airlines serving 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.
7.8
DeltaOverall score based on 8462 reviews
7.8Comfort
7.8Entertainment
8.1Boarding
8.5Crew
7.2Food
Airline reviews

Crew was absolutely fantastic and we’re so welcoming and friendly ❤️

10.0 ExcellentRachel, Jul 2026
SFO - SLC
Read more Delta reviews

Crew was absolutely fantastic and we’re so welcoming and friendly ❤️

It was as good as it could be. Flying is not a pleasant experience these days.

Very good flight. Crew was great. No issues and we even arrived early.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

After a 5 hour delay waiting at the gate (3 delays adding up) with no clear reason provided, we finally boarded flew 3/4 of the way to Toronto then were turned back to New York. As we neared New York, the pilot declared that it was his fault, something to do with timing and him not being allowed into the country???? How could the airline let his happen? They had hours to prepare and make sure they had a crew available for the flight! We ended up in Toronto a day late with no sleep.

Rode in a smaller plane and short trip meant no snacks, no free wifi or tv. It was only 30min flight so honestly wasn’t a big deal to lack these items.

We were forced to wait nearly 50 additional minutes before leaving the terminal.

I appreciated friendly service from check-in, to boarding, to in-flight amenities! Attendants were accommodating and helpful. Thank you! Elaine

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

Entertainment kept turning itself off. Gave up on watching a movie.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Not United Airlines' fault. It's ORL airport's fault.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

Very nice flight love the small aircraft. We had a wonderful flight attendant. Nice to see someone that really enjoys her job. Don't have her name but had a southern accent.

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

Backpack should NOT allowed put in the flight bin , only put it under the seat. I can't find space put my carry on luggage!!! and I pay for it ! that was very bad experience

Flight was fine, it was delayed but only 30 minutes, staff were efficient, lady making announcements at LAX was really hard to understand but the rest were great.

A good, solid, no frills experience. Departed and arrived on time, staff were pleasant and attentive. Loved the Bluetooth connectivity on the SJC to IAH leg. Being able to watch movies and listen to them with my noise cancelling headphones was lovely. Missed that on the IAH to LHR leg (so I put the wired buds on and my over ear Quiet Comforts over those).

Over the course of 7 months of travel, I can count on my hand the number of times the flight has departed on time. Majority of the instances have been related to non-weather reasons. Would not recommend flying this Airline

The food was okay and the space in business class was smaller than we had to Singapore.

My luggage never made it, I booked business class only to find out I’m sitting in the back. Very disappointed with the reservation

The plane was spartan, the seats not that comfortable. It was like flying a super low budget airline. They charged for coffee!!! I have never, ever experienced that before.

Rough flight No beverage service due to turbulence Bottom Seat cushion was non existent

They are rarely on time! Very hard to plan your travels when flights or connections keep getting delayed.

Flight was late and boarding was confusing because gate changed and I didn’t get a notification

Was a normal flight but it was delayed, and there wasn't an explanation.

Boarding was disorganized and delayed because they overbooked and wanted people to give up seats then further delayed due to an issue with the plane. They did not load my bag and it took a day for them to return it. Flight attendant was lovely and the only positive thing about this trip.

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.

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

Information on your arrival and departure airports