Cheap Flights from Ontario (ONT) to San Francisco (SFO) from HK$690~

View HK$690 flight on Tue, 18 Nov 2025Opens in a new window

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

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days and start at HK$690 for one-way flights and HK$1,229 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, 13 Nov - Mon, 17 Nov
ONT
Ontario
SFO
San Francisco
HK$1,229 Return, found 5 days ago
HK$1,229
Return
found 5 days ago
Select United flight, departing Thu, 13 Nov from Ontario to San Francisco, returning Mon, 17 Nov, priced at HK$1,229 found 5 days ago
United
Wed, 10 Dec - Mon, 15 Dec
ONT
Ontario
SFO
San Francisco
HK$1,348 Return, found 4 days ago
HK$1,348
Return
found 4 days ago
Select United flight, departing Wed, 10 Dec from Ontario to San Francisco, returning Mon, 15 Dec, priced at HK$1,348 found 4 days ago
United
Sun, 14 Dec - Mon, 15 Dec
ONT
Ontario
SFO
San Francisco
HK$1,423 Return, found 4 days ago
HK$1,423
Return
found 4 days ago
Select United flight, departing Sun, 14 Dec from Ontario to San Francisco, returning Mon, 15 Dec, priced at HK$1,423 found 4 days ago
United
Tue, 16 Dec - Sat, 17 Jan
ONT
Ontario
SFO
San Francisco
HK$1,434 Return, found 4 days ago
HK$1,434
Return
found 4 days ago
Select United flight, departing Tue, 16 Dec from Ontario to San Francisco, returning Sat, 17 Jan, priced at HK$1,434 found 4 days ago
American Airlines
Thu, 13 Nov - Mon, 17 Nov
ONT
Ontario
SFO
San Francisco
HK$1,500 Return, found 5 days ago
HK$1,500
Return
found 5 days ago
Select American Airlines flight, departing Thu, 13 Nov from Ontario to San Francisco, returning Mon, 17 Nov, priced at HK$1,500 found 5 days ago
United
Thu, 13 Nov - Mon, 17 Nov
ONT
Ontario
SFO
San Francisco
HK$1,541 Return, found 1 day ago
HK$1,541
Return
found 1 day ago
Select United flight, departing Thu, 13 Nov from Ontario to San Francisco, returning Mon, 17 Nov, priced at HK$1,541 found 1 day ago
United
Thu, 11 Dec - Mon, 15 Dec
ONT
Ontario
SFO
San Francisco
HK$1,573 Return, found 4 days ago
HK$1,573
Return
found 4 days ago
Select United flight, departing Thu, 11 Dec from Ontario to San Francisco, returning Mon, 15 Dec, priced at HK$1,573 found 4 days ago
United
Tue, 16 Dec - Thu, 18 Dec
ONT
Ontario
SFO
San Francisco
HK$1,584 Return, found 4 days ago
HK$1,584
Return
found 4 days ago
Select United flight, departing Tue, 16 Dec from Ontario to San Francisco, returning Thu, 18 Dec, priced at HK$1,584 found 4 days ago
United
Wed, 10 Dec - Mon, 19 Jan
ONT
Ontario
SFO
San Francisco
HK$1,627 Return, found 4 days ago
HK$1,627
Return
found 4 days ago
Select United flight, departing Wed, 10 Dec from Ontario to San Francisco, returning Mon, 19 Jan, priced at HK$1,627 found 4 days ago
Delta
Thu, 22 Jan - Wed, 28 Jan
ONT
Ontario
SFO
San Francisco
HK$2,284 Return, found 5 days ago
HK$2,284
Return
found 5 days ago
Select Delta flight, departing Thu, 22 Jan from Ontario to San Francisco, returning Wed, 28 Jan, priced at HK$2,284 found 5 days ago

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

January is typically the cheapest month to fly

From HK$373 - HK$1,812 per traveller.

Alternative airports near San Francisco

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to San Francisco Intl. SFO. Cheapest and Closest option available. Average driving time to city centre is 19 minutes. Flights from HK$1,380
SFO
San Francisco Intl.
CheapestClosest
Average driving time to city centre19 min
Flights from HK$1,380
Ontario to San Francisco route information
Origin airport
Los Angeles - Ontario Intl.
Destination airport
San Francisco Intl.
Airlines serving
United
Return price
HK$1,068
Distance
582 km
Average flight time
1 hour 25 mins

Flights from Los Angeles to San Francisco

Book cheap flights from Los Angeles (ONT) to San Francisco (SFO) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from Los Angeles (ONT) to San Francisco (SFO) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Los Angeles (ONT) to San Francisco (SFO) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your San Francisco flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in San Francisco and things to do in San Francisco for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to San Francisco more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to San Francisco is HK$690 now!

 

Frequently asked questions

How much is a flight from ONT to SFO?
If you're traveling between ONT and SFO, round-trip flights start from HK$1,229. 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 kilometers 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.