Flight profile · Frontier Airlines

F91230

San Francisco (SFO) to Denver (DEN) · scheduled 6:00 AM – 9:39 AM

FlyerIntel does not track flights in the air. This page describes how F91230 has historically performed, which is a different and more useful question when you are deciding what to book. For today’s status, check with Frontier Airlines.

How F91230 performs

734 operations, 2023-11-16 to 2026-06-30.

On-time arrivals

83.2%

606 of 728 completed

Cancellation rate

0.82%

6 cancelled

Median arrival delay

-8 min

Average 4.8 min

Severe delays

5.8%

Arrived 60+ minutes late

Delay when late

83 min

Average, when 15+ min late

Departure punctuality

87.1%

Left the gate on time

F91230 arrived on time 83.2% of the time, against 76.7% for all SFO → DEN flights — this specific departure is 6.5 percentage points better than the route as a whole. Against Frontier Airlines’s own flights on this route it is 14.1 points better.

Source: US DOT Bureau of Transportation Statistics · 734 operations between 2023-11-16 to 2026-06-30

Against the rest of the route

	On time	Cancelled	Median delay	Severe	Flights
F91230	83.2%	0.82%	-8 min	5.8%	734
Frontier Airlines on SFO → DEN	69.1%	1.13%	-1 min	12.3%	1,944
All SFO → DEN flights	76.7%	0.61%	-5 min	7.7%	16,605

Source: FlyerIntel analysis of US DOT BTS data · 2023-11-16 to 2026-06-30

Data and methodology

Calculated by FlyerIntel from 734 records of F91230 operating SFO → DEN, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.

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SFO → DEN route profile Frontier Airlines SFO airport