$35 Cheap flights from Los Angeles - Ontario Intl. to San Francisco Intl. (ONT to SFO)

Discover our best flights from Ontario ONT to San Francisco SFO. 

With 20 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 

Find our best return flights from Ontario ONT to San Francisco SFO at the right price  

Airfares to San Francisco SFO from Ontario ONT currently cost between $57 and $90. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 

Book one-way flights from Ontario ONT to San Francisco SFO 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from Ontario ONT to San Francisco SFO on Travelocity starting at $35. Prices and availability subject to change. Additional terms may apply. 

Get to San Francisco SFO from Ontario ONT quicker with direct flights. 

Get to San Francisco faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to SFO from ONT to take around 1 hour(s) 27 min(s).  

Find our cheapest airfares for flights from Ontario ONT to San Francisco SFO

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to SFO from ONT. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  

Get our best airfare deals for your flight from Ontario ONT to San Francisco SFO today 

If you’re flexible about when you travel, June is usually the cheapest month to fly from Ontario ONT to San Francisco SFO. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 

Book flexible airline tickets for flights to San Francisco SFO from Ontario ONT 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to SFO from ONT have this option.  

Travel with confidence when you book flights to San Francisco SFO from Ontario ONT with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving.