Flight profile · Frontier Airlines
F93439
Denver (DEN) to San Francisco (SFO) · scheduled 10:29 PM – 11:59 PM
How F93439 performs
645 operations, 2024-05-16 to 2026-06-30.
F93439 arrived on time 65.8% of the time, against 68.5% for all DEN → SFO flights — this specific departure is 2.7 percentage points worse than the route as a whole. Against Frontier Airlines’s own flights on this route it is 1.7 points worse.
Source: US DOT Bureau of Transportation Statistics · 645 operations between 2024-05-16 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| F93439 | 65.8% | 1.40% | 1 min | 9.4% | 645 |
| Frontier Airlines on DEN → SFO | 67.5% | 0.93% | -1 min | 10.8% | 1,943 |
| All DEN → SFO flights | 68.5% | 0.70% | -1 min | 11.2% | 16,595 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-05-16 to 2026-06-30
Other routes F93439 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
Because the same number has served different journeys, the statistics above describe only the route F93439 currently operates. Blending them would produce an average of two different flights.
Why F93439 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding, fuelling — within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for F93439 on DEN → SFO. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on DEN → SFO
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA1812 | United Airlines | 79.2% | 7 min early | 624 |
| UA1561 | United Airlines | 74.1% | 4 min early | 938 |
| UA1007 | United Airlines | 68.0% | 0 min early | 755 |
| UA2681 | United Airlines | 60.3% | 4 min late | 837 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 645 records of F93439 operating DEN → SFO, 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.
Full methodology · Report a problem
Analysis last recomputed