F91261 DenverDEN · 22:29 OntarioONT · 23:50
F91261 by Frontier Airlines flies from Denver (DEN) to Ontario (ONT).
scheduled from DEN
⚖ F91261 typically leaves +41 and lands +11. The air wins minutes back.Where the minutes go
last 7 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operationmedian arrival +11 min · 2 cancelled · 15 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at DEN and ONT 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 Denver to Ontario flights today
same route · Frontier AirlinesIf F91261 is cancelled, this is the other Frontier Airlines nonstop flight from Denver to Ontario on the same day, with scheduled departure times in DEN local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How F91261 actually runs
Pro Flight Search has tracked every published board update for F91261 across the DEN and ONT boards: schedule changes, gate pushes and actual clocks. Usually lands ~14 min late. Based on 12 confirmed landings · 7/12 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 F91261 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: N388FR, N393FR, N391FR, N402FR.
Board clocks recorded as DEN and ONT published them.
Planning around F91261? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — F91261 Denver to Ontario on-time performance, measured from the DEN and ONT airport boards.
https://proflightsearch.com/flight/F91261
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