€163 Cheap Flights Ontario to San Francisco (ONT-SFO)

View €163 flight on Tue, 6 Jan 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 €163 for one-way flights and €289 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, 6 Jan - Sat, 17 Jan
ONT
Ontario
SFO
San Francisco
€289 Return, found 3 days ago
€289
Return
found 3 days ago
Select American Airlines flight, departing Tue, 6 Jan from Ontario to San Francisco, returning Sat, 17 Jan, priced at €289 found 3 days ago
United
Tue, 6 Jan - Sat, 17 Jan
ONT
Ontario
SFO
San Francisco
€296 Return, found 3 days ago
€296
Return
found 3 days ago
Select United flight, departing Tue, 6 Jan from Ontario to San Francisco, returning Sat, 17 Jan, priced at €296 found 3 days ago
American Airlines
Tue, 6 Jan - Sat, 17 Jan
ONT
Ontario
SFO
San Francisco
€341 Return, found 3 days ago
€341
Return
found 3 days ago
Select American Airlines flight, departing Tue, 6 Jan from Ontario to San Francisco, returning Sat, 17 Jan, priced at €341 found 3 days ago
United
Tue, 6 Jan - Sat, 17 Jan
ONT
Ontario
SFO
San Francisco
€347 Return, found 3 days ago
€347
Return
found 3 days ago
Select United flight, departing Tue, 6 Jan from Ontario to San Francisco, returning Sat, 17 Jan, priced at €347 found 3 days ago

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

January is typically the cheapest month to fly

From €41 - €137 per traveller.
Ontario to San Francisco route information
Origin airport
Los Angeles - Ontario Intl.
Destination airport
San Francisco Intl.
Return price
€289
Distance
582 km
Average flight time
1 hour 39 mins

Perfect flights from Ontario to San Francisco

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Ontario to San Francisco. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Los Angeles - Ontario Intl. to San Francisco Intl. ticket options cater to your travel preferences, with incredible one-way fares from €163 and roundtrip prices from €289. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at San Francisco Intl. and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in San Francisco.

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 €289. 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

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