S$ 20 Cheap Flights from San Francisco to Ontario (SFO-ONT)

Cheap Flights from San Francisco to Ontario

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Cheap Flights from San Francisco to Ontario starting at CNY 20

We've found these cheap flights for you. You can book one-way or return flight tickets.

One way
Round-trip

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

Cheapest time to fly from San Francisco to Ontario

We monitor flight fares to help you find the best deals effortlessly

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

Cheapest Airlines flying 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 S$ 20

Southwest Airlines

From S$ 96

United Airlines

From S$ 126

American Airlines

From S$ 147

Alaska Airlines

From S$ 165

Delta Air Lines

From S$ 314

ANA airlines

Find more flights and airlines

Alternative Routes from San Francisco to Ontario

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from San Francisco to Ontario.

Cheapest
SFO
20:27
1h 30m
Direct
ONT
21:57
San Francisco International Airport - Ontario International Airport
Sat, May 4Frontier Airlines
S$ 20
SFO
20:27
1h 30m
Direct
ONT
21:57
San Francisco International Airport - Ontario International Airport
Sat, May 4Frontier Airlines
S$ 20
Find More Flights

Frequently Asked Questions

When to buy flight tickets 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 cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much is a flight from San Francisco (SFO) to Ontario (ONT) cost?
According to Trip.com's data, the lowest price is around S$ 197.
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

Find cheapest flight ticket from San Francisco to Ontario

Cheapest direct flight price	S$ 19
Cheapest return ticket price	S$ 45
Cheapest month	February
Peak season for travel	February
Flight distance	12,799.42km
Popular airline	Frontier Airlines