S$144 Cheap Flights from Ontario to San Francisco

View S$144 flight on Thu, 5 Feb, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to San Francisco Intl. Airport (SFO)

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

Prices were available within the past 7 days and start at S$144 for one-way flights and S$355 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, 18 Feb - Sat, 21 Feb
ONT
Ontario
SFO
San Francisco
S$355 Return, found 1 day ago
S$355
Return
found 1 day ago
Select United flight, departing Wed, 18 Feb from Ontario to San Francisco, returning Sat, 21 Feb, priced at S$355 found 1 day ago
American Airlines
Wed, 18 Feb - Sat, 21 Feb
ONT
Ontario
SFO
San Francisco
S$438 Return, found 1 day ago
S$438
Return
found 1 day ago
Select American Airlines flight, departing Wed, 18 Feb from Ontario to San Francisco, returning Sat, 21 Feb, priced at S$438 found 1 day ago
United
Wed, 18 Feb - Sat, 21 Feb
ONT
Ontario
SFO
San Francisco
S$446 Return, found 1 day ago
S$446
Return
found 1 day ago
Select United flight, departing Wed, 18 Feb from Ontario to San Francisco, returning Sat, 21 Feb, priced at S$446 found 1 day ago
American Airlines
Mon, 26 Jan - Mon, 2 Feb
ONT
Ontario
SFO
San Francisco
S$582 Return, found 7 hours ago
S$582
Return
found 7 hours ago
Select American Airlines flight, departing Mon, 26 Jan from Ontario to San Francisco, returning Mon, 2 Feb, priced at S$582 found 7 hours ago
American Airlines
Mon, 26 Jan - Mon, 2 Feb
ONT
Ontario
SFO
San Francisco
S$606 Return, found 7 hours ago
S$606
Return
found 7 hours ago
Select American Airlines flight, departing Mon, 26 Jan from Ontario to San Francisco, returning Mon, 2 Feb, priced at S$606 found 7 hours ago
United
Mon, 26 Jan - Mon, 2 Feb
ONT
Ontario
SFO
San Francisco
S$634 Return, found 7 hours ago
S$634
Return
found 7 hours ago
Select United flight, departing Mon, 26 Jan from Ontario to San Francisco, returning Mon, 2 Feb, priced at S$634 found 7 hours ago
American Airlines
Mon, 26 Jan - Mon, 2 Feb
ONT
Ontario
SFO
San Francisco
S$681 Return, found 7 hours ago
S$681
Return
found 7 hours ago
Select American Airlines flight, departing Mon, 26 Jan from Ontario to San Francisco, returning Mon, 2 Feb, priced at S$681 found 7 hours ago
American Airlines
Mon, 26 Jan - Mon, 2 Feb
ONT
Ontario
SFO
San Francisco
S$705 Return, found 7 hours ago
S$705
Return
found 7 hours ago
Select American Airlines flight, departing Mon, 26 Jan from Ontario to San Francisco, returning Mon, 2 Feb, priced at S$705 found 7 hours ago
American Airlines
Mon, 26 Jan - Mon, 2 Feb
ONT
Ontario
SFO
San Francisco
S$777 Return, found 7 hours ago
S$777
Return
found 7 hours ago
Select American Airlines flight, departing Mon, 26 Jan from Ontario to San Francisco, returning Mon, 2 Feb, priced at S$777 found 7 hours ago
Delta
Mon, 26 Jan - Mon, 2 Feb
ONT
Ontario
SFO
San Francisco
S$852 Return, found 7 hours ago
S$852
Return
found 7 hours ago
Select Delta flight, departing Mon, 26 Jan from Ontario to San Francisco, returning Mon, 2 Feb, priced at S$852 found 7 hours ago

Find the cheapest month to fly from Ontario (ONT) to San Francisco (SFO)

January is typically the cheapest month to fly

From S$62 - S$206 per traveller.
Ontario to San Francisco route information
Origin airport
Los Angeles - Ontario Intl.
Destination airport
San Francisco Intl.
Airlines serving
American Airlines, United
Return price
S$355
Distance
582 km
Average flight time
1 hour 35 mins

Perfect flights from Ontario to San Francisco

Your Journey from Ontario to San Francisco

Start your unforgettable journey with Expedia. Our broad selection of flights from Ontario to San Francisco caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
 

Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including United, Delta, American Airlines. Our selection of flights from Los Angeles - Ontario Intl. to San Francisco Intl. caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with Ontario to San Francisco Flights

Experience the joy of finding cheap flights from Los Angeles - Ontario Intl. to San Francisco Intl. that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$144 and roundtrip prices from S$355*.
 

Pre-Flight Essentials

Ensure a smooth journey from Ontario to San Francisco with Expedia. From information about check-in times and in-flight amenities to guidance on baggage policies, we provide all the essentials to prepare you for your flight.
 

Experience the Vibrant San Francisco

Picture yourself stepping off the plane in San Francisco and immersing yourself in the unique atmosphere of . From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

Added Convenience on Your Ontario to San Francisco Flight

Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from Ontario to San Francisco.
 

Beyond the Flight – Exploring San Francisco

With Expedia, your adventure extends beyond the flight. Explore San Francisco at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from Ontario to San Francisco with Confidence

Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support make your travel experience seamless and stress-free. Embark on your journey from Ontario to San Francisco with confidence. Book your travel arrangements with Expedia today.
 
*Note: Prices may vary based on availability and are subject to change.

Frequently asked questions

How much is a flight from ONT to SFO?
If you're travelling between ONT and SFO, round-trip flights start from S$355. This price is based on airfares available within the last 7 days on Expedia for flights departing within the next year, so don't wait around. Book now and save yourself money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Los Angeles - Ontario Intl. Airport (ONT) to San Francisco Airport?
We get that things crop up unexpectedly, so we've made it as easy as possible for you to cancel your flight online. Just visit the Customer Service Portal and follow the instructions.
How do I find cheap flights from Los Angeles - Ontario Intl. Airport (ONT) to San Francisco Intl. Airport (SFO) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for ONT to SFO flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Ontario Airport to San Francisco Airport?
It's only 590 kilometres between Ontario and San Francisco. It's quite possible that you'll spend more time getting to and from the airport than you will actually flying!
Which airlines fly direct from Los Angeles - Ontario Intl. Airport (ONT) to San Francisco Airport?
With 121 monthly flights from Ontario Airport to SFO, United Airlines (UA) is a top choice. Frontier Airlines (F9) is also worth checking out. It operates 21 flights per month. Between these two airlines, you'll be able to find a good deal from Ontario to San Francisco.
Are Los Angeles - Ontario Intl. Airport (ONT) to San Francisco Airport flight tickets cheaper when they're purchased at the last minute?
Late planners can sometimes nab a bargain, with some of the cheapest fares from Ontario Airport to San Francisco Airport showing up a few weeks before the date of departure. If you'd rather book ahead of time, Expedia compares and updates all the best flight deals continually — as early as 12 months in advance in some cases. It does depend on the carrier though, as not all airlines issue prices so far in advance.

Explore a world of travel with Expedia

*Available to Expedia members.