€140 Cheap Flights Ontario to San Francisco (ONT-SFO)

View €140 flight on Wed, 31 Dec 2025Opens 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 €140 for one-way flights and €121 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, 4 Dec - Mon, 8 Dec
ONT
Ontario
SFO
San Francisco
€121 Return, found 3 days ago
€121
Return
found 3 days ago
Select United flight, departing Thu, 4 Dec from Ontario to San Francisco, returning Mon, 8 Dec, priced at €121 found 3 days ago
American Airlines
Thu, 4 Dec - Sun, 7 Dec
ONT
Ontario
SFO
San Francisco
€162 Return, found 5 days ago
€162
Return
found 5 days ago
Select American Airlines flight, departing Thu, 4 Dec from Ontario to San Francisco, returning Sun, 7 Dec, priced at €162 found 5 days ago
American Airlines
Thu, 4 Dec - Mon, 8 Dec
ONT
Ontario
SFO
San Francisco
€163 Return, found 3 days ago
€163
Return
found 3 days ago
Select American Airlines flight, departing Thu, 4 Dec from Ontario to San Francisco, returning Mon, 8 Dec, priced at €163 found 3 days ago
American Airlines
Thu, 4 Dec - Mon, 8 Dec
ONT
Ontario
SFO
San Francisco
€168 Return, found 3 days ago
€168
Return
found 3 days ago
Select American Airlines flight, departing Thu, 4 Dec from Ontario to San Francisco, returning Mon, 8 Dec, priced at €168 found 3 days ago
American Airlines
Thu, 4 Dec - Sun, 7 Dec
ONT
Ontario
SFO
San Francisco
€171 Return, found 5 days ago
€171
Return
found 5 days ago
Select American Airlines flight, departing Thu, 4 Dec from Ontario to San Francisco, returning Sun, 7 Dec, priced at €171 found 5 days ago
United
Thu, 4 Dec - Sun, 7 Dec
ONT
Ontario
SFO
San Francisco
€199 Return, found 5 days ago
€199
Return
found 5 days ago
Select United flight, departing Thu, 4 Dec from Ontario to San Francisco, returning Sun, 7 Dec, priced at €199 found 5 days ago
American Airlines
Thu, 4 Dec - Sun, 7 Dec
ONT
Ontario
SFO
San Francisco
€202 Return, found 5 days ago
€202
Return
found 5 days ago
Select American Airlines flight, departing Thu, 4 Dec from Ontario to San Francisco, returning Sun, 7 Dec, priced at €202 found 5 days ago
American Airlines
Thu, 4 Dec - Mon, 8 Dec
ONT
Ontario
SFO
San Francisco
€203 Return, found 3 days ago
€203
Return
found 3 days ago
Select American Airlines flight, departing Thu, 4 Dec from Ontario to San Francisco, returning Mon, 8 Dec, priced at €203 found 3 days ago
United
Thu, 4 Dec - Sun, 7 Dec
ONT
Ontario
SFO
San Francisco
€208 Return, found 5 days ago
€208
Return
found 5 days ago
Select United flight, departing Thu, 4 Dec from Ontario to San Francisco, returning Sun, 7 Dec, priced at €208 found 5 days ago
Delta
Thu, 4 Dec - Mon, 8 Dec
ONT
Ontario
SFO
San Francisco
€240 Return, found 3 days ago
€240
Return
found 3 days ago
Select Delta flight, departing Thu, 4 Dec from Ontario to San Francisco, returning Mon, 8 Dec, priced at €240 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 €42 - €139 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 €121. 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.
Return price
€120
Distance
582 km
Average flight time
1 hour 25 mins

Book with confidence

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 €140 and roundtrip prices from €121. 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.
Perfect flights from Ontario to San Francisco

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