Nonstop route
Ontario to San Francisco nonstop
Yes — United and Frontier fly ONT to SFO nonstop year-round — about 4× daily.
ONTOntario
✈
SFOSan Francisco
4× daily28 flights a week
Year-round28/wk Jun vs 20.8/wk Jan
$25–$150typical one-way · median $75
363miles nonstop
Affiliate disclosure
Ready to compare fares?
Fares are what people actually paid: half of the 3,221 tickets in the US DOT fare survey for this route sold between $25 and $150 one way, median $75. That survey runs a couple of quarters behind, so treat it as the shape of the route's pricing rather than today's quote.
Nonstop Scout may earn revenue from outbound flight-search links.