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Uncover the best deals on San Francisco to Ontario flights by comparing fares from hundreds of airlines and agencies.
Good to Know: Cheapest and Fastest SFO - ONT Flights
Useful information for finding best airline tickets from San Francisco International to Ontario International on your next trip.
Cheapest Round Trip Flight
$94
Southwest Airlines
• 1 stop
• 5h 45m
Sep 19 – Sep 19
The cheapest round trip flight from San Francisco to Ontario (SFO-ONT-SFO) is currently $94
Cheapest One way Flight
$263
United Airlines
• nonstop
• 2h 15m
Sep 27
The cheapest one way flight from San Francisco to Ontario (SFO-ONT) is currently $263
Cheapest Direct Flight
$229
United Airlines
• nonstop
• 2h 11m
Sep 19
The cheapest nonstop flight from San Francisco to Ontario (SFO-ONT) is currently $229
Fastest Flight
2h 11m
The fastest nonstop flight from San Francisco to Ontario (SFO-ONT) takes 2h 11m
Top Airlines Flying from San Francisco to Ontario
Latest Flight Deals from San Francisco (SFO) to Ontario (ONT)
Compare and book low fare round-trip air tickets from San Francisco to Ontario. Ideal for travelers with confirmed return itineraries.
Sep 19 - Sep 19, Economy
San Francisco → Ontario
5h 45m
5:00 AM - 8:45 AM • 1 stop
San Francisco → Ontario
13h 50m
1:00 PM - 9:30 PM • 1 stop
Southwest Airlines
Sep 19 - Sep 19, Economy
San Francisco → Ontario
8h 25m
6:10 AM - 11:15 AM • 1 stop
San Francisco → Ontario
27h 15m
2:55 PM - 7:30 AM • 1 stop
Southwest Airlines
Sep 19 - Sep 19, Economy
San Francisco → Ontario
5h 45m
5:00 AM - 8:45 AM • 1 stop
San Francisco → Ontario
1h 55m
3:00 PM - 4:15 PM • nonstop
Southwest Airlines
Sep 19 - Sep 19, Economy
San Francisco → Ontario
18h 35m
6:10 AM - 5:25 PM • 1 stop
San Francisco → Ontario
20h 50m
11:55 PM - 12:45 PM • 1 stop
Southwest Airlines
Sep 19 - Sep 21, Economy
San Francisco → Ontario
2h 11m
6:30 PM - 8:01 PM • nonstop
San Francisco → Ontario
2h 7m
6:08 AM - 7:35 AM • nonstop
United Airlines
Explore competitive one-way airfare options for SFO - ONT flights. Best suited for flexible or open-ended travel plans.
Sep 27, Economy
San Francisco → Ontario
11h 55m
12:20 PM - 7:35 PM • 2 stops
Southwest Airlines
Flying to Ontario soon? We've surfaced some of the most affordable last-minute flights from San Francisco to Ontario, ideal for urgent plans or spontaneous trips.
Sep 27, Economy
San Francisco → Ontario
11h 55m
12:20 PM - 7:35 PM • 2 stops
Southwest Airlines
Looking for the fastest way to Ontario? These direct flight options from SFO to ONT offer both convenience and value—no layovers, just straight to your destination.
Sep 19 - Sep 21, Economy
San Francisco → Ontario
2h 11m
6:30 PM - 8:01 PM • nonstop
San Francisco → Ontario
2h 7m
6:08 AM - 7:35 AM • nonstop
United Airlines
Sep 19 - Sep 19, Economy
San Francisco → Ontario
2h 15m
10:37 AM - 12:12 PM • nonstop
San Francisco → Ontario
2h 12m
4:18 PM - 5:50 PM • nonstop
United Airlines
FAQs on San Francisco to Ontario Flights
What are the airports in San Francisco?
SFO
What’s the most popular airline flying from SFO to ONT?
The most popular airline flying from San Francisco to Ontario are
Can I fly from SFO to ONT non-stop?
Yes, you can fly SFO to ONT non-stop on
Which airlines fly nonstop between San Francisco and Ontario?
The non-stop flights between San Francisco and Ontario are .
What’s the earliest departure time from SFO to ONT Airport?
The earliest flight leaves SFO at 5:00 am and lands in ONT - Ontario International
What are the airports in Ontario?
ONT
Can I make changes to my San Francisco to Ontario 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 SFO to ONT?
Read the fare rules of the San Francisco to Ontario 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 San Francisco and Ontario?
operate flights between San Francisco and Ontario
How long does a flight from San Francisco to Ontario take?
It takes approximately 1 hour to fly non-stop from SFO to ONT, which is 363.46 miles by air.
Which airlines provide the cheapest flights from San Francisco (SFO) to Ontario (ONT) ?
In the past couple of days, the cheapest tickets to ONT from SFO were found on UA : USD 301
Do I need a passport to fly between SFO and ONT?
No
What’s the latest departure time from SFO to ONT ?
The last flight leaves SFO at 7:50 pm
San Francisco (SFO) to Ontario (ONT): Airport Information
| Origin Airport | San Francisco International , San Francisco, US |
| Destination Airport | Ontario International , Ontario, US |
| Distance | 363 miles |
More Flight Options for San Francisco (SFO) and Ontario (ONT)
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Flights from San Francisco (SFO)
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Flights from Orlando (MCO)
to Ontario (ONT)
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to Ontario (ONT)
Flights from Fayetteville/Springdale (XNA)
to Ontario (ONT)
Flights from Fayetteville/Springdale (XNA)
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to Ontario (ONT)
Flights from Sacramento (SMF)
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Flights from Indianapolis (IND)
to Ontario (ONT)
Flights from Indianapolis (IND)
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Flights from Atlanta (ATL)
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Flights from Tulsa (TUL)
to Ontario (ONT)
Flights from Albuquerque (ABQ)
to Ontario (ONT)
Flights from Denver (DEN)
to Ontario (ONT)
Flights from Denver (DEN)
to Ontario (ONT)
Flights from Portland (PDX)
to Ontario (ONT)
Flights from Portland (PDX)
to Ontario (ONT)
Flights from Des Moines (DSM)
to Ontario (ONT)
Flights from Des Moines (DSM)
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Flights from Seattle (SEA)
to Ontario (ONT)
Flights from Seattle (SEA)
to Ontario (ONT)
Cheap flights to North America (NA)
Cheap flights to United States (US)
Cheap flights to California (US-CA)
Cheap flights from North America (NA)
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Cheap flights from California (US-CA)
Flights to Ontario (ONT)
Flights to Ontario (ONT)
Flights to San Francisco (SFO)
Flights from Ontario (ONT)
Flights from Ontario (ONT)
to San Francisco (SFO)
Flights from Ontario (ONT)
to San Francisco (SFO)
Flights from San Francisco (SFO)
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