- Cheapest roundtrip flight
- from€318
- Fastest flight
- non-stop flights
- 23x / 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 · 10 of 10
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- October 11 – 17, 2026
- October 18 – 24, 2026
- October 25 – 31, 2026
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- ONTSFOnonstop
- ONTSFOnonstop
- ONTSFOnonstop
- ONTSFOnonstop
- ONTSFOnonstop
- ONTSFOnonstop
- 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. If you choose a connecting flight, allow more travel time. Typical one-stop itineraries take around 6 hours 7 minutes. For the quickest trip, a nonstop flight is usually the most comfortable choice.
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. Connecting flights with one stop are also available, for example with American Airlines (via Phoenix - Sky Harbor). If travel time matters to you, a direct flight is usually the most convenient option. Connecting flights often give you more choice of departure times and airlines.
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 23 to 24 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 6:53 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.