F91159 OntarioONT · 12:07 San FranciscoSFO · 13:43
F91159 by Frontier Airlines flies from Ontario (ONT) to San Francisco (SFO).
scheduled from ONT
Where the minutes go
last 4 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at ONT and SFO are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
How F91159 actually runs
Pro Flight Search has tracked every published board update for F91159 across the ONT and SFO boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 4 confirmed landings · 3/4 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how F91159 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N440FR, N232FR, N374FR.
Board clocks recorded as ONT and SFO published them.
Planning around F91159? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — F91159 Ontario to San Francisco on-time performance, measured from the ONT and SFO airport boards.
https://proflightsearch.com/flight/F91159
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