Cheap Flight Tickets from San Francisco (SFO) to Ontario (ONT)

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Latest Flight Deals from San Francisco to Ontario

Book one-way or return flights from San Francisco to Ontario from as little as AU$ 24. Choose from the popular airlines below and book your flight today!

One way
Return

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Searching for the best last minute flight from San Francisco to Ontario? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from San Francisco to Ontario. Stay updated on price trends and snag the best deals for your upcoming trip.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Airlines Flying from San Francisco to Ontario

View airlines operating flights from San Francisco to Ontario. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines

From AU$ 24

Southwest Airlines

From AU$ 108

United Airlines

From AU$ 144

American Airlines

From AU$ 156

Alaska Airlines

From AU$ 192

Delta Air Lines

From AU$ 355

Hawaiian Airlines

From AU$ 566

ANA airlines

Find more flights and airlines

Alternative Routes from San Francisco to Ontario

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from San Francisco to Ontario.

Cheapest
SFO
05:15
1h 21m
Direct
ONT
06:36
San Francisco International Airport - Ontario International Airport
Wed, Jun 26Frontier Airlines
AU$ 24
SFO
05:15
1h 21m
Direct
ONT
06:36
San Francisco International Airport - Ontario International Airport
Wed, Jun 26Frontier Airlines
AU$ 24
Find More Flights

How do I find the cheapest flights?

When are flight from San Francisco (SFO) to Ontario (ONT) the cheapest?
Airlines adjust prices for flights from San Francisco to Ontario based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much are flights from San Francisco (SFO) to Ontario (ONT) cost?
According to Trip.com's data, the lowest price is around AU$ 221.
What's the most popular airline for direct flights from San Francisco (SFO) to Ontario (ONT)?
Jetblue Airways operates 1 direct flights from San Francisco (SFO) to Ontario (ONT).

How to find a cheap flight from San Francisco to Ontario

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from San Francisco to Ontario. Book your flights at the right time and save more.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com

Flight Information from San Francisco to Ontario

Cheapest direct flight price	AU$ 24
Cheapest return ticket price	AU$ 51
Off-season for travel	February
Peak season for travel	February
Flight distance	12,799.42km
Popular airline	Frontier Airlines