F9440 San FranciscoSFO DenverDEN
F9440 by Frontier Airlines flies from San Francisco (SFO) to Denver (DEN).
scheduled from SFO
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 F9440 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 F9440 actually runs
Pro Flight Search has tracked every published board update for F9440 across the SFO and DEN boards: schedule changes, gate pushes and actual clocks. Combined risk score: 50.0/100. Based on airport operations, weather, and cached board history at SFO and DEN.
The verdict above is that record speaking, so it reflects how F9440 operates rather than what the timetable promises. Numbers refresh as new flights operate.
Planning around F9440? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — F9440 San Francisco to Denver on-time performance, measured from the SFO and DEN airport boards.
https://proflightsearch.com/flight/F9440
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