Flights from San Francisco (SFO) to Ontario (ONT)

Route intelligence for SFO → ONT: direct flights, stopover options, and timetable coverage in one place.

Show route on mapAll flights from SFOAll flights to ONT

Direct flights

2 direct option(s) across 2 airline(s).

  • Frontier Airlines · 0 min · 0 km
  • United Airlines · 70 min · 585 km

Explore these airlines on this city pair

Open each airline route-map page to compare broader network depth before committing to a nonstop or one-stop strategy.

Frontier Airlines route map →United Airlines route map →

Stopover options

  • 1 stop(s) · 3h 8m · SFO → ONT
  • 1 stop(s) · 3h 20m · SFO → ONT
  • 1 stop(s) · 3h 20m · SFO → ONT
  • 1 stop(s) · 3h 20m · SFO → ONT
  • 1 stop(s) · 4h 6m · SFO → ONT
  • 1 stop(s) · 4h 6m · SFO → ONT
  • 1 stop(s) · 4h 6m · SFO → ONT
  • 1 stop(s) · 4h 6m · SFO → ONT
  • 1 stop(s) · 4h 6m · SFO → ONT
  • 1 stop(s) · 4h 6m · SFO → ONT
  • 1 stop(s) · 4h 28m · SFO → ONT
  • 1 stop(s) · 4h 28m · SFO → ONT

Timetable coverage

Published flight numbers: AC4423, UA5740, AC4322, UA2661, AC4014, EK6372, UA1561, AC4122, CM1456, UA552

Flight number: AC 4423

Operating days: 1, 2, 3, 4, 5, 6, 7

  • SFO 07:24 → ONT 09:03

Plan this city pair

Compare nearby alternatives and airline networks to decide whether a direct trip, one-stop connection, or reverse search gives you better options.

Explore all departures from SFO →Explore all arrivals to ONT →Compare airline network coverage →Browse airports by country →

Route planning checklist

  • Compare direct duration with one-stop total duration before committing to a fare.
  • Check inbound alternatives on flights to ONT when return timing is important.
  • Use Guides for alliance and hub strategy playbooks.
Back to full map