Cheap Flight Tickets from Ontario (ONT) to San Francisco (SFO), Starting at $85

Good to Know: Cheapest and Fastest ONT - SFO Flights

Useful information for finding best airline tickets from Ontario International to San Francisco International on your next trip.

Cheapest Round Trip Flight

$210

F9 Frontier Airlines • nonstop • 2h 11m

Oct 18 – Oct 20

The cheapest round trip flight from Ontario to San Francisco (ONT-SFO-ONT) is currently $210

🔍 Search Flights

Cheapest One way Flight

$295

WN Southwest Airlines • 1 stop • 15h 50m

Oct 22

The cheapest one way flight from Ontario to San Francisco (ONT-SFO) is currently $295

🔍 Search Flights

Cheapest Direct Flight

$681

UA United Airlines • nonstop • 2h 9m

Oct 09

The cheapest nonstop flight from Ontario to San Francisco (ONT-SFO) is currently $681

🔍 Search Flights

Fastest Flight

1h 50m

The fastest nonstop flight from Ontario to San Francisco (ONT-SFO) takes 1h 50m

Top Airlines Flying from Ontario to San Francisco

Alaska Airlines -AS

Alaska Airlines

Southwest Airlines-WN

Southwest Airlines

Delta Airline, DL

Delta Airlines

American Airlines, AA

American Airlines

United Airlines, UA

United Airlines

Latest Flight Deals from Ontario (ONT) to San Francisco (SFO)

Compare and book low fare round-trip air tickets from Ontario to San Francisco. Ideal for travelers with confirmed return itineraries.

Oct 18 - Oct 20, Economy
F9
Ontario → San Francisco
2h 11m
12:01 PM - 1:32 PM • nonstop
F9
Ontario → San Francisco
11h 59m
9:11 AM - 4:30 PM • 1 stop
$210
Frontier Airlines
Nov 22 - Nov 29, Economy
WN
Ontario → San Francisco
10h
4:00 PM - 10:00 PM • 1 stop
WN
Ontario → San Francisco
2h 15m
10:50 AM - 12:25 PM • nonstop
$234
Southwest Airlines
Nov 22 - Nov 29, Economy
WN
Ontario → San Francisco
8h 40m
6:50 PM - 12:10 AM • 1 stop
WN
Ontario → San Francisco
2h 20m
7:20 PM - 9:00 PM • nonstop
$234
Southwest Airlines
Oct 09 - Oct 09, Economy
WN
Ontario → San Francisco
7h 35m
8:40 AM - 1:35 PM • 1 stop
WN
Ontario → San Francisco
2h 5m
8:40 PM - 10:05 PM • nonstop
$282
Southwest Airlines
Oct 09 - Oct 09, Economy
WN
Ontario → San Francisco
7h 35m
8:40 AM - 1:35 PM • 1 stop
WN
Ontario → San Francisco
7h 25m
7:25 PM - 12:10 AM • 1 stop
$285
Southwest Airlines
Oct 18 - Oct 20, Economy
AS
Ontario → San Francisco
8h 38m
11:29 AM - 4:47 PM • 1 stop
AS
Ontario → San Francisco
2h 10m
7:52 PM - 9:22 PM • nonstop
$618
Alaska Airlines

Fly from Ontario to San Francisco with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Ontario to San Francisco? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Ontario to San Francisco Flights

What are the airports in Ontario?
ONT
What’s the most popular airline flying from ONT to SFO?
The most popular airline flying from Ontario to San Francisco are
Can I fly from ONT to SFO non-stop?
Yes, you can fly ONT to SFO non-stop on
Which airlines fly nonstop between Ontario and San Francisco?
The non-stop flights between Ontario and San Francisco are .
What’s the earliest departure time from ONT to SFO Airport?
The earliest flight leaves ONT at 5:20 am and lands in SFO - San Francisco International
What are the airports in San Francisco?
SFO
Can I make changes to my Ontario to San Francisco flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from ONT to SFO?
Read the fare rules of the Ontario to San Francisco air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Ontario and San Francisco?
operate flights between Ontario and San Francisco
How long does a flight from Ontario to San Francisco take?
It takes approximately 1 hour to fly non-stop from ONT to SFO, which is 363.46 miles by air.
Which airlines provide the cheapest flights from Ontario (ONT) to San Francisco (SFO) ?
In the past couple of days, the cheapest tickets to SFO from ONT were found on WN : USD 328
Do I need a passport to fly between ONT and SFO?
No
What’s the latest departure time from ONT to SFO ?
The last flight leaves ONT at 6:50 pm

Ontario (ONT) to San Francisco (SFO): Airport Information

Origin Airport Ontario International , Ontario, US
Destination Airport San Francisco International , San Francisco, US
Distance 363 miles

More Flight Options for Ontario (ONT) and San Francisco (SFO)

Why Fareleaders for ONT to SFO Plane Tickets

Lowest Prices
Lowest Prices
Uncover the best deals on Ontario to San Francisco flights by comparing fares from hundreds of airlines and agencies.
New Deals
New Deals Everyday
Get the best prices on ONT to SFO flights—we update our fares daily so you never miss a saving.
Best Travel Options
No Service Fees
Compare hundreds of Ontario to San Francisco flights and secure the best deals—we never add any service fees.
Get Fare Drop Alert
Be the first to know when fares drop for the Ontario (ONT) to San Francisco (SFO)
Terms and Conditions*