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

Popular airlines from San Francisco Intl. Airport (SFO) to Ontario, OR (ONO-Ontario Municipal)

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Flights from San Francisco (SFO) to Ontario (ONO)
Origin airport
San Francisco Intl.
Destination airport
Ontario Municipal
Distance
529 mi

San Francisco to Ontario Flights

The cheapest times to fly from San Francisco to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Francisco to Ontario are during the month of . You can find some of the cheapest flights from San Francisco to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Francisco to Ontario

Sunday is one of the best days to book for cheap flights from San Francisco to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Francisco to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Francisco to Ontario in 2026. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Francisco to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Francisco to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from San Francisco Intl. Airport (SFO) to Ontario, OR (ONO-Ontario Municipal) cost?
Grab a cheap one-way flight or cheap return flight from San Francisco Intl. Airport (SFO) to Ontario, OR (ONO-Ontario Municipal) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from San Francisco Intl. Airport (SFO) to Ontario, OR (ONO-Ontario Municipal)?
The cheapest month to fly from SFO to ONO is , when there's less demand. Off-peak months are often when airlines offer lower prices between these airports.
What is the cheapest airline that flies from San Francisco Intl. Airport (SFO) to Ontario, OR (ONO-Ontario Municipal)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest SFO to ONO flight.
How many flights per day from San Francisco Intl. Airport (SFO) to Ontario, OR (ONO-Ontario Municipal)?
You'll have to hop on a flight with a layover when traveling from San Francisco Intl. Airport (SFO) to Ontario, OR (ONO-Ontario Municipal). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from SFO to ONO?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can vary depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Francisco Intl. Airport (SFO) to Ontario, OR (ONO-Ontario Municipal)?
To avoid possible delays on the San Francisco Intl. Airport (SFO) to Ontario, OR (ONO-Ontario Municipal) route, aim to travel before 3 PM. Later departures have a 22% higher chance of cancellation.**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.
What airports do you fly into for Ontario from San Francisco Intl. Airport (SFO)?
Check out your flight options from San Francisco Intl. Airport (SFO) to Boise Airport (BOI). This is the only Ontario airport you can arrive at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from San Francisco Intl. Airport (SFO) to Ontario, OR (ONO-Ontario Municipal) last-minute?
Last-minute fares from SFO to ONO are usually more expensive. To lock in the lowest prices, start looking for flights as soon as possible. That said, if you can play around with your travel dates, it's possible to land a cheap ticket just before your departure.
Is it cheaper to book a SFO to ONO flight and hotel package?
Compared with arranging flights and hotels separately, booking a SFO to ONO flight and hotel package with Expedia could lead to significant savings. Better yet, having it all in one place takes the hassle out of travel planning. Just pick your flights and choose from our extensive range of hotels, then customize your trip with other add-ons like activities and car rentals.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to Ontario, OR (ONO-Ontario Municipal)?
Usually, it's possible to cancel or reschedule your SFO to ONO flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

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