- Fastest flight
- non-stop flights
- 27x / week
- Flight distance
- 585 km
- Time difference
- none
- Most popular airlines
- United Airlines
- Frontier Airlines
- United Airlines
Flight schedule from Ontario (ONT) to San Francisco (SFO)
Select a travel date in the flight schedule for the route from Ontario (ONT) to San Francisco (SFO) and compare affordable flight deals.
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Matching outbound flightsONT–SFO · 13 of 13
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- September 13 – 19, 2026
- September 20 – 26, 2026
- Sep 27 – Oct 3, 2026
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- ONTSFOnonstop
- ONTSFOnonstop
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Tips and tricks to help you find cheap flights from Ontario to San Francisco
Favorite airline: Frontier Airlines
The favorite airline for flights from Ontario to San Francisco is Frontier Airlines.
Frontier Airlines
90 %
United Airlines
10 %
Important flight information
Frequently Asked Questions (FAQ)
How long is the flight from Ontario to San Francisco?
A nonstop flight from Ontario to San Francisco typically takes around 1 hour 29 minutes. This makes the nonstop service the fastest and most convenient way to travel between Ontario and San Francisco. It is worth checking flight times when searching, as they can vary by airline and travel date.
Are there nonstop flights from Ontario to San Francisco?
Yes, there are nonstop flights from Ontario to San Francisco, averaging around 3 to 4 flights per day, operated by, among others, United Airlines and Frontier Airlines. If you want to fly without a layover, it is worth filtering specifically for nonstop flights when searching.
Which airlines fly from Ontario to San Francisco?
Direct flights from Ontario to San Francisco are operated by, among others, United Airlines and Frontier Airlines. These flights take you to San Francisco nonstop, making them especially practical for short trips or weekend getaways. It is still worth comparing departure times and airline policies, as baggage rules and fees can vary.
On which days are there nonstop flights from Ontario to San Francisco?
Nonstop flights from Ontario to San Francisco operate daily. The schedule may vary by season, so it is worth comparing several travel dates. If your preferred day does not have a nonstop flight, nearby departure days or short connecting flights may be a good alternative.
How many flights are there per day from Ontario to San Francisco?
On the route from Ontario to San Francisco, there are on average around 3 to 4 flights per day. The number of flights can vary by day of the week and season. If you are flexible with your dates, it is worth comparing several departure days.
How many flights per week are there from Ontario to San Francisco?
From Ontario to San Francisco, there are around 27 to 28 flights per week. This means you usually have connections available on several days and at various times. Beyond the price, it is worth comparing flight duration, airline, and any potential additional fees.
When does the first flight from Ontario to San Francisco depart?
The earliest nonstop flight from Ontario to San Francisco usually departs at 6:00 AM. The exact departure time may vary by day of the week and airline. Early flights are especially useful if you want to make the most of your arrival day in San Francisco.
When does the last flight from Ontario to San Francisco depart?
The last nonstop flight from Ontario to San Francisco usually departs at 7:13 PM. Late flights can be convenient if you want to travel after work or in the evening. Do check whether it is a nonstop flight, as a connecting itinerary could push the arrival time significantly later.