Cheap Flights from Ontario (ONO) to San Francisco (SFO)

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Find available prices by choosing your travel dates.

Frequently asked questions

How much does a flight from Ontario, OR (ONO-Ontario Municipal) to San Francisco Intl. Airport (SFO) cost?
Discover the latest flight deals from ONO to SFO by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from ONO to SFO?
The cheapest flights from ONO to SFO are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Ontario, OR (ONO-Ontario Municipal) to San Francisco Intl. Airport (SFO)?
You can’t catch a direct flight to San Francisco Intl. Airport (SFO) from Ontario, OR (ONO-Ontario Municipal). However, you can easily reach San Francisco without any layovers by departing from Boise Airport (BOI).
What is the cheapest airline that flies from ONO to SFO?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from ONO to SFO. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Ontario, OR (ONO-Ontario Municipal) to San Francisco Intl. Airport (SFO)?
There are no daily nonstop flights available from Ontario, OR (ONO-Ontario Municipal) to San Francisco Intl. Airport (SFO). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you’ll be on your way before you know it.
What day of the week has the most flights from ONO to SFO?
You’ll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Ontario, OR (ONO-Ontario Municipal) to San Francisco Intl. Airport (SFO)?
Opt for a flight from Ontario, OR (ONO-Ontario Municipal) to San Francisco Intl. Airport (SFO) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Ontario, OR (ONO-Ontario Municipal) to San Francisco Intl. Airport (SFO) last-minute?
Last-minute fares from ONO to SFO are typically more expensive. To secure the lowest prices, start looking for flights well in advance. That said, if you’re flexible with your travel dates, you may land a cheap fare just before your departure.
Is it cheaper to book an ONO to SFO flight and hotel package?
You’ll generally save money by securing an ONO to SFO flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it’s easy to manage everything in one convenient place. After selecting your preferred flights and accommodations, consider other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Ontario, OR (ONO-Ontario Municipal) to San Francisco Intl. Airport (SFO)?
If you reserved your ONO to SFO flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.
*Available to One Key members.