F91230 San FranciscoSFO · 06:04 DenverDEN · 09:46
F91230 by Frontier Airlines flies from San Francisco (SFO) to Denver (DEN) for the Mon, Sep 14 departure.
arrival expected at DEN · on schedule
board checked 21m ago · checking again in 45s
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 SFO and DEN 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.
Other San Francisco to Denver flights today
same route · Frontier AirlinesIf F91230 is cancelled, these are the other Frontier Airlines nonstop flights from San Francisco to Denver on the same day, with scheduled departure times in SFO local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How F91230 actually runs
Pro Flight Search has tracked every published board update for F91230 across the SFO and DEN boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 4 confirmed landings · 3/4 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how F91230 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: N654FR, N705FR, N435FR, N616FR.
Board clocks recorded as SFO and DEN published them.
Planning around F91230? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — F91230 San Francisco to Denver on-time performance, measured from the SFO and DEN airport boards.
https://proflightsearch.com/flight/F91230
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