Direct flights from San Francisco to Ontario SFO → ONT
Frontier Airlines and United Airlines operate nonstop flights from San Francisco (SFO) to Ontario (ONT). The nonstop flight takes around ~0h 44m, covering 364 miles (585 km) and operates multiple daily. Updated 28 June 2026.
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Frontier Airlines
F9
United Airlines
UA
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Frequently asked questions
Is there a direct flight from San Francisco to Ontario?
Yes, Frontier Airlines and United Airlines operate nonstop flights from San Francisco (SFO) to Ontario (ONT).
Which airlines fly direct from San Francisco to Ontario?
Frontier Airlines, United Airlines operate nonstop flights from San Francisco to Ontario.
How long is the flight from San Francisco to Ontario?
The nonstop flight from San Francisco to Ontario takes ~0h 44m (approximately 585 km).
How often do direct flights operate from San Francisco to Ontario?
Nonstop flights from San Francisco to Ontario operate multiple daily.