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

$25

Frontier Airlines

Direct flight

1h 34m

01/26/2026

The cheapest one-way flight from Ontario to San Jose departs on 01/26/2026, is operated by Frontier Airlines and costs $25

Cheapest round trip flight

$163

Frontier Airlines

Direct flight

3h 8m

12/14/2025

The cheapest roundtrip flight from Ontario to San Jose departs on 12/14/2025, is operated by Frontier Airlines and costs $163

The fastest flight

1h 21m

Fastest flight from Ontario to San Jose takes 1h 21m

Direct flights

Several times a week

There are direct flights on this route 3 days a week: Mo, We, and Th

Earliest flight

6:20 AM

Latest flight

8:30 PM

Direct flights count

31

Distance

530km

Timezone difference

0h

The distance between Ontario and San Jose is 530km (329 miles). There are 31 direct flights from Ontario to San Jose. Ontario and San Jose are in the same time zone. Flights from Ontario begin at 6:20 AM. The latest flight from Ontario departs at 8:30 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 — $84 (February 2026), maximum — $153 (July 2026). Typically, the flight costs $126–$306.

February 2026

Lowest price

on average:

$84

July 2026

Highest price

on average:

$153

Avg Price

Airlines operating on route

The Ontario — San Jose route is served by multiple airlines, including United Airlines, Alaska Airlines, and Frontier Airlines. This is convenient for those who want the best balance of price, schedule, and travel conditions. Tickets start from $25, 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.

United Airlines

Starting at $87

Alaska Airlines

Starting at $69

Frontier Airlines

Starting at $25

Direct Flights from Ontario to San Jose

A direct 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.

Los Angeles — San Francisco

LAX — SFO

01/07/2026

Departure

Direct flight

UA1453

Starting at $87

Los Angeles — San Francisco

LAX — SFO

07/01/2026

Departure

Direct flight

AS3450

Starting at $118

Los Angeles — San Francisco

LAX — SFO

12/18/2025

Departure

Direct flight

F93581

Starting at $105

Los Angeles — San Francisco

LAX — SFO

01/15/2026

Departure

Direct flight

UA2315

Starting at $93

Los Angeles — San Francisco

LAX — SFO

01/27/2026

Departure

Direct flight

AS2329

Starting at $69

Schedule of direct flights from Ontario to San Jose

A direct flight is the easiest way to get to your destination. The following airlines operate non-stop flights from Ontario to San Jose:

Unable to find information about the schedule of direct flights from

Ontario airports overview

Ontario International Airport

•

ONT

5km

•

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.

How much is the cheapest flight ticket from Ontario to San Jose?

The cheapest flight ticket from Ontario to San Jose according to data for the last 48 hours costs $25

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: February, January, August.

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

The fastest flights from Ontario to San Jose start from 1 hour 21 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: United Airlines, Alaska Airlines, Frontier 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

$25

Frontier Airlines

Direct flight

1h 34m

01/26/2026

The cheapest one-way flight from Ontario to San Jose departs on 01/26/2026, is operated by Frontier Airlines and costs $25

Cheapest round trip flight

$163

Frontier Airlines

Direct flight

3h 8m

12/14/2025

The cheapest roundtrip flight from Ontario to San Jose departs on 12/14/2025, is operated by Frontier Airlines and costs $163

The fastest flight