Cheap Flights from Ontario to San Jose

Cheapest flights from Ontario to San Jose

Flaut.Travel was designed and developed by a team dedicated to making the process of searching, comparing and booking airline tickets as easy and convenient as possible. Our service helps travelers to find and buy the cheapest flights from Ontario to San Jose. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.

Cheapest one way flight

$72

Frontier Airlines

Direct flight

1h 35m

11/02/2026

The cheapest one-way flight from Ontario to San Jose departs on 11/02/2026, is operated by Frontier Airlines and costs $72

Cheapest round trip flight

$271

Southwest Airlines

Direct flight

2h 25m

11/25/2026

The cheapest roundtrip flight from Ontario to San Jose departs on 11/25/2026, is operated by Southwest Airlines and costs $271

The fastest flight

1h 35m

Fastest flight from Ontario to San Jose takes 1h 35m

Direct flights

Once a week

There are direct flights on this route 1 day a week: Mo

Earliest flight

6:00 AM

Latest flight

8:10 PM

Direct flights count

30

Distance

530km

Timezone difference

0h

The distance between Ontario and San Jose is 530km (329 miles). There are 30 direct flights from Ontario to San Jose. Ontario and San Jose are in the same time zone. Flights from Ontario begin at 6:00 AM. The latest flight from Ontario departs at 8:10 PM

Remember that on average the ideal time to book flights is 2 months before departure!

Airfare from Ontario to San Jose by month

In different months, ticket prices from Ontario to San Jose vary: minimum — $64 (November 2026), maximum — $387 (March 2027). Typically, the flight costs $131–$146.

November 2026

Lowest price

on average:

$64

March 2027

Highest price

on average:

$387

Avg Price

Price dynamics

Flight prices from Ontario to San Jose are steadily rising: from October 2026 to June 2027, ticket costs increased by 374%. The sooner you book, the better the deal.

Cheaper and more expensive periods

The most significant price increase was from October 2026 to March 2027 — up 495%. The best time to fly is October 2026–November 2026, when the average price is $64. In March 2027–June 2027, tickets cost around $347.

Best time to buy

Given the rising prices, it's best not to delay your purchase. Flying in October 2026–November 2026 can save you up to 81% compared to the most expensive months.

Price predictability

Price variation across months on this route is 88.9%. Your choice of departure month significantly affects the total flight cost.

Airlines operating on route

The Ontario — San Jose route is served by multiple airlines, including Southwest Airlines and Frontier Airlines. This is convenient for those who want the best balance of price, schedule, and travel conditions. Tickets start from $72, and depending on season and promotions, even better deals may appear. With our service, you can easily compare available options and book tickets that match your plans. The variety of carriers allows flexible choices and comfortable travel without overpaying.

Southwest Airlines

starting at $92

Frontier Airlines

starting at $72

Non-stop flights from Ontario to San Jose

A non-stop flight is the most convenient and comfortable way to fly from Ontario to San Jose, despite the fact that sometimes flights with transfers can cost significantly less.

Ontario — San Jose

ONT — SJC

11/02/2026

Departure

Direct flight

WN3320

starting at $92

Schedule of direct flights from Ontario to San Jose

There are most likely no direct flights on the Ontario — San Jose route

Ontario airports overview

Ontario International Airport

•

ONT

5km

Serves Ontario and the Inland Empire region of Southern California, offering domestic and select international flights; convenient for travelers to Los Angeles, San Bernardino and nearby business centers.

•

San Jose airports overview

Norman Y. Mineta San Jose International Airport

•

SJC

5km

•

Frequently asked questions (FAQ)

Answers to questions about the route that travelers are most interested in.

What is the cheapest price for flights from Ontario to San Jose?

The cheapest flight ticket from Ontario to San Jose according to data for the last 48 hours costs $72

When is the best time to buy air tickets on the route Ontario — San Jose?

Often the best time to buy tickets from Ontario to San Jose is 2 months before departure.

When is the cheapest time of year to fly from Ontario to San Jose?

Based on statistics over the past years, the lowest prices for flights from Ontario to San Jose can be found flying in these months: November, January, October.

How long does it take to fly from Ontario to San Jose?

The fastest flights from Ontario to San Jose start from 1 hour 35 minutes in the air.

Which airline can fly direct from Ontario to San Jose?

The following airlines operate direct flights on the route Ontario — San Jose: Southwest Airlines

Special offers and sales on air tickets from Ontario to San Jose

We keep tight track on airlines' pre-holidays sales and other special offers occurences all the time to let you save maximum amount of funds while traveling to your family or just going out on vacation.

We couldn't find any special offers for flights from Ontario to San Jose

Alternative routes

Bakersfield ➜ San Jose•Fresno ➜ San Jose•Long Beach ➜ San Jose•Merced ➜ San Jose•Modesto ➜ San Jose•Mexicali ➜ San Jose•Santa Barbara ➜ San Jose•Santa Maria ➜ San Jose•Tijuana ➜ San Jose•Yuma ➜ San Jose•Ontario ➜ Concord•Ontario ➜ Berkeley•Ontario ➜ Merced•Ontario ➜ Modesto•Ontario ➜ Sacramento•Ontario ➜ Stockton•Ontario ➜ San Francisco•Ontario ➜ Santa Rosa

•••••••••••••••••••

Cheapest one way flight

$72

Frontier Airlines

Direct flight

1h 35m

11/02/2026

The cheapest one-way flight from Ontario to San Jose departs on 11/02/2026, is operated by Frontier Airlines and costs $72

Cheapest round trip flight

$271

Southwest Airlines

Direct flight

2h 25m

11/25/2026

The cheapest roundtrip flight from Ontario to San Jose departs on 11/25/2026, is operated by Southwest Airlines and costs $271

The fastest flight