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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
$127
Frontier Airlines
• nonstop
• 2h 16m
Sep 25 – Sep 27
The cheapest round trip flight from Ontario to San Francisco (ONT-SFO-ONT) is currently $127
Cheapest One way Flight
$177
Southwest Airlines
• 1 stop
• 10h 15m
Aug 27
The cheapest one way flight from Ontario to San Francisco (ONT-SFO) is currently $177
Cheapest Direct Flight
$127
Frontier Airlines
• nonstop
• 2h 16m
Sep 25
The cheapest nonstop flight from Ontario to San Francisco (ONT-SFO) is currently $127
Fastest Flight
2h 7m
The fastest nonstop flight from Ontario to San Francisco (ONT-SFO) takes 2h 7m
Top Airlines Flying from Ontario to San Francisco
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.
Sep 25 - Sep 27, Economy
Ontario → San Francisco
2h 16m
12:07 PM - 1:43 PM • nonstop
Ontario → San Francisco
2h 14m
6:02 PM - 7:36 PM • nonstop
Frontier Airlines
Sep 25 - Sep 27, Economy
Ontario → San Francisco
6h 50m
5:40 AM - 9:50 AM • 1 stop
Ontario → San Francisco
9h 15m
10:05 AM - 4:00 PM • 2 stops
Southwest Airlines
Sep 25 - Sep 27, Economy
Ontario → San Francisco
2h 7m
6:00 AM - 7:27 AM • nonstop
Ontario → San Francisco
2h 15m
10:43 AM - 12:18 PM • nonstop
United Airlines
Sep 25 - Sep 27, Economy
Ontario → San Francisco
2h 13m
11:10 AM - 12:43 PM • nonstop
Ontario → San Francisco
2h 23m
8:40 AM - 10:23 AM • nonstop
United Airlines
Sep 25 - Sep 27, Economy
Ontario → San Francisco
2h 9m
1:52 PM - 3:21 PM • nonstop
Ontario → San Francisco
2h 21m
1:41 PM - 3:22 PM • nonstop
United Airlines
Explore competitive one-way airfare options for ONT - SFO flights. Best suited for flexible or open-ended travel plans.
Flying to San Francisco soon? We've surfaced some of the most affordable last-minute flights from Ontario to San Francisco, ideal for urgent plans or spontaneous trips.
Looking for the fastest way to San Francisco? These direct flight options from ONT to SFO offer both convenience and value—no layovers, just straight to your destination.
Sep 25 - Sep 27, Economy
Ontario → San Francisco
2h 16m
12:07 PM - 1:43 PM • nonstop
Ontario → San Francisco
2h 14m
6:02 PM - 7:36 PM • nonstop
Frontier Airlines
Sep 25 - Sep 27, Economy
Ontario → San Francisco
2h 7m
6:00 AM - 7:27 AM • nonstop
Ontario → San Francisco
2h 15m
10:43 AM - 12:18 PM • nonstop
United Airlines
Sep 25 - Sep 27, Economy
Ontario → San Francisco
2h 13m
11:10 AM - 12:43 PM • nonstop
Ontario → San Francisco
2h 23m
8:40 AM - 10:23 AM • nonstop
United Airlines
Sep 25 - Sep 27, Economy
Ontario → San Francisco
2h 9m
1:52 PM - 3:21 PM • nonstop
Ontario → San Francisco
2h 21m
1:41 PM - 3:22 PM • nonstop
United Airlines
Sep 25 - Sep 27, Economy
Ontario → San Francisco
2h 27m
6:32 PM - 8:19 PM • nonstop
Ontario → San Francisco
2h 11m
7:00 PM - 8:31 PM • nonstop
United Airlines
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 5:40 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 AS : USD 319
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 6:32 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 |
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