S$114 Cheap Flights from Ontario to San Francisco

View S$114 flight on Tue, 5 May, 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$114 for one-way flights and S$234 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, 22 Apr - Sat, 25 Apr
ONT
Ontario
SFO
San Francisco
S$234 Return, found 4 days ago
S$234
Return
found 4 days ago
Select Delta flight, departing Wed, 22 Apr from Ontario to San Francisco, returning Sat, 25 Apr, priced at S$234 found 4 days ago
United
Sat, 21 Mar - Sat, 4 Apr
ONT
Ontario
SFO
San Francisco
S$275 Return, found 1 day ago
S$275
Return
found 1 day ago
Select United flight, departing Sat, 21 Mar from Ontario to San Francisco, returning Sat, 4 Apr, priced at S$275 found 1 day ago
Alaska Airlines
Wed, 22 Apr - Mon, 4 May
ONT
Ontario
SFO
San Francisco
S$285 Return, found 4 days ago
S$285
Return
found 4 days ago
Select Alaska Airlines flight, departing Wed, 22 Apr from Ontario to San Francisco, returning Mon, 4 May, priced at S$285 found 4 days ago
Delta
Sat, 25 Apr - Tue, 28 Apr
ONT
Ontario
SFO
San Francisco
S$309 Return, found 4 days ago
S$309
Return
found 4 days ago
Select Delta flight, departing Sat, 25 Apr from Ontario to San Francisco, returning Tue, 28 Apr, priced at S$309 found 4 days ago
United
Mon, 20 Apr - Wed, 22 Apr
ONT
Ontario
SFO
San Francisco
S$315 Return, found 4 days ago
S$315
Return
found 4 days ago
Select United flight, departing Mon, 20 Apr from Ontario to San Francisco, returning Wed, 22 Apr, priced at S$315 found 4 days ago
Alaska Airlines
Wed, 22 Apr - Mon, 27 Apr
ONT
Ontario
SFO
San Francisco
S$321 Return, found 4 days ago
S$321
Return
found 4 days ago
Select Alaska Airlines flight, departing Wed, 22 Apr from Ontario to San Francisco, returning Mon, 27 Apr, priced at S$321 found 4 days ago
Alaska Airlines
Wed, 22 Apr - Sat, 2 May
ONT
Ontario
SFO
San Francisco
S$327 Return, found 4 days ago
S$327
Return
found 4 days ago
Select Alaska Airlines flight, departing Wed, 22 Apr from Ontario to San Francisco, returning Sat, 2 May, priced at S$327 found 4 days ago
United
Mon, 20 Apr - Wed, 22 Apr
ONT
Ontario
SFO
San Francisco
S$334 Return, found 4 days ago
S$334
Return
found 4 days ago
Select United flight, departing Mon, 20 Apr from Ontario to San Francisco, returning Wed, 22 Apr, priced at S$334 found 4 days ago
United
Fri, 24 Apr - Mon, 27 Apr
ONT
Ontario
SFO
San Francisco
S$344 Return, found 4 days ago
S$344
Return
found 4 days ago
Select United flight, departing Fri, 24 Apr from Ontario to San Francisco, returning Mon, 27 Apr, priced at S$344 found 4 days ago
American Airlines
Sat, 25 Apr - Sun, 26 Apr
ONT
Ontario
SFO
San Francisco
S$417 Return, found 4 days ago
S$417
Return
found 4 days ago
Select American Airlines flight, departing Sat, 25 Apr from Ontario to San Francisco, returning Sun, 26 Apr, priced at S$417 found 4 days ago

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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$207 per traveller.

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$234. 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.

Travel information

Origin airport
Los Angeles - Ontario Intl.
Destination airport
San Francisco Intl.
Airlines serving
American Airlines, Delta, United
Return price
S$234
Distance
582 km
Average flight time
1 hour 35 mins

Book with confidence

Perfect flights from Ontario to San Francisco

Your Journey from Ontario to San Francisco

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Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including United, Delta, American Airlines, Alaska 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$114 and roundtrip prices from S$234*.
 

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.
Perfect flights from Ontario to San Francisco

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