Cheap Flights from Ontario to San Francisco Starting at $39

Helping travelers to find the best flight offers

Cheapest flights from Ontario to San Francisco

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 Francisco. 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

$39

Frontier Airlines
Direct flight
1h 45m
04/16/2025

The cheapest one-way flight from Ontario to San Francisco departs on 04/16/2025, is operated by Frontier Airlines and costs $39

Cheapest round trip flight

$83

Frontier Airlines
Direct flight
3h 13m
06/07/2025

The cheapest roundtrip flight from Ontario to San Francisco departs on 06/07/2025, is operated by Frontier Airlines and costs $83

The fastest flight

1h 25m

Fastest flight from Ontario to San Francisco takes 1h 25m

Direct flights

Every day

There are direct flights on this route 7 days a week: Su, Mo, Tu, We, Th, Fr, and Sa

Earliest flight

6:00 AM

Latest flight

6:38 PM

Direct flights count

25

Distance

597km

Timezone difference

0h

The distance between Ontario and San Francisco is 597km (370 miles). There are 25 direct flights from Ontario to San Francisco. Ontario and San Francisco are in the same time zone. Flights from Ontario begin at 6:00 AM. The latest flight from Ontario departs at 6:38 PM.

See also:

Cheap flights to United States

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Direct flights airfares to San Francisco

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Cheapest air tickets to Ontario

Airfare from Ontario to San Francisco by month

We carefully collect statistics on the search and pricing of airlines and, based on these data, we make an assumption about future prices. Thus, you can better understand which season is the cheapest to fly from Ontario to San Francisco

March 2025
Lowest price
on average:
$33
June 2025
Highest price
on average:
$161
Mar 25Apr 25May 25Jun 25Jul 25020406080100120140160180Avg Price

Airlines operating on route

Below you will find a list of airlines operating flights on the Ontario — San Francisco route and the starting prices for flights of each specific airline on it.

Frontier Airlines

Starting at $39

Hawaiian Airlines

Starting at $58

United Airlines

Starting at $59

Alaska Airlines

Starting at $73

Direct Flights from Ontario to San Francisco

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

San Francisco city image

Los Angeles — San Francisco

LAX — SFO

04/27/2025

Departure date

Direct flight

UA332

Starting at $110

San Francisco city image

Los Angeles — San Francisco

LAX — SFO

04/05/2025

Departure date

Direct flight

WN3360

Starting at $77

San Francisco city image

Los Angeles — San Francisco

LAX — SFO

04/11/2025

Departure date

Direct flight

AS2149

Starting at $147

San Francisco city image

Los Angeles — San Francisco

LAX — SFO

04/30/2025

Departure date

Direct flight

WN453

Starting at $93

San Francisco city image

Los Angeles — San Francisco

LAX — SFO

05/11/2025

Departure date

Direct flight

HA4963

Starting at $105

San Francisco city image

Los Angeles — San Francisco

LAX — SFO

03/29/2025

Departure date

Direct flight

AS871

Starting at $159

San Francisco city image

Los Angeles — San Francisco

LAX — SFO

03/30/2025

Departure date

Direct flight

AS871

Starting at $146

San Francisco city image

Los Angeles — San Francisco

LAX — SFO

04/01/2025

Departure date

Direct flight

WN1241

Starting at $111

San Francisco city image

Los Angeles — San Francisco

LAX — SFO

04/03/2025

Departure date

Direct flight

AS6687

Starting at $98

San Francisco city image

Los Angeles — San Francisco

LAX — SFO

04/08/2025

Departure date

Direct flight

WN2907

Starting at $112

Schedule of direct flights from Ontario to San Francisco

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

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Unable to find information about the schedule of direct flights from

Ontario airports overview

ONT
Ontario International Airport
Alaska Airlines
Frontier Airlines
Airlines flying to this airport
$23
Starting at
$42-28%
on average
LAX
Los Angeles International Airport
United Airlines
Alaska Airlines
Frontier Airlines
Airlines flying to this airport
$25
Starting at
$54
on average

San Francisco airports overview

SFO
San Francisco International Airport
United Airlines
Alaska Airlines
Frontier Airlines
Airlines flying to this airport
$23
Starting at
$50
on average

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 Francisco?

The cheapest flight ticket from Ontario to San Francisco according to data for the last 48 hours costs $39

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

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

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

Based on statistics over the past years, the lowest prices for flights from Ontario to San Francisco can be found flying in these months: March, April, May.

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

The fastest flights from Ontario to San Francisco start from 1 hour 25 minutes in the air.

Which airline can fly direct from Ontario to San Francisco?

The following airlines operate direct flights on the route Ontario — San Francisco: United Airlines, Southwest Airlines, Alaska Airlines

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

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.

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

Alternative routes

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