Cheap flights from San Francisco to Ontario (SFO - ONT)

Flight FAQs

From San Francisco to Ontario

Are flight prices decreasing from San Francisco to Ontario due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both San Francisco and Ontario for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Which airlines flying from San Francisco to Ontario have flexible cancellations due to COVID-19?

Some of our airline partners flying from San Francisco to Ontario have new flexible policies in place due to COVID-19. United Airlines, American Airlines, and Alaska Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like United Airlines with this kind of flexibility.

What airports do I use to fly from San Francisco to Ontario?

Ontario is the airport most travelers will use when flying to Ontario from San Francisco. Booking flights from San Francisco (SFO) to Ontario (ONT) should be relatively easy as there are 5 daily flights to Ontario from 10 different airlines. 1h 17m is how long a flight from San Francisco to Ontario will take if you book a nonstop flight.

Can I find flights from San Francisco to Ontario for under $100 on Cheapflights?

Yes, there are multiple flights from San Francisco to Ontario for under $100. The cheapest flight booked recently is on Frontier for just $64, but on average you can expect to pay $97.

Are there nonstop flights from San Francisco to Ontario for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from San Francisco to Ontario under $100. A good price for a nonstop flight from San Francisco to Ontario is less than $109.

Are there last-minute flights available from San Francisco to Ontario for under $100?

There are currently 20+ open flights from San Francisco to Ontario within the next 7 days for less than $100.

What days are nonstop flights available from San Francisco to Ontario?

Days when nonstop flights are available for this flight are: Monday, Wednesday, Thursday, Friday, Saturday.

How popular is this flight route?

Flights from San Francisco to Ontario have been viewed 791 times in the past calendar month.

Does it rain more in San Francisco or Ontario?

Expected rainfall in San Francisco is same as in Ontario. You can expect this to be the case over the next 3 days.

Is San Francisco weather warmer or cooler than Ontario?

You can imagine temperatures to be in the 95 °F range in July. The weather in Ontario is generally hotter than San Francisco's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.

How long is the flight from San Francisco to Ontario?

Departing from San Francisco to Ontario will take you 1h 19m. Generally, flights for this route are nonstop.

What are the cheapest airlines flying from San Francisco to Ontario round-trip?

Frontier, at $64, was found to be the cheapest airline from San Francisco to Ontario. An alternate airline flying to your destination would be United Airlines. Frontier is currently priced 71% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from San Francisco to Ontario one-way?

The cheapest airlines for a one-way flight from San Francisco to Ontario are Frontier ($30), United Airlines ($59), and American Airlines ($76).