Flight profile · Frontier Airlines
F91608
Denver (DEN) to Milwaukee (MKE) · scheduled 3:46 PM – 9:32 AM
How F91608 performs
283 operations, 2023-11-17 to 2026-04-27.
F91608 arrived on time 79.7% of the time, against 75.2% for all DEN → MKE flights — this specific departure is 4.5 percentage points better than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 283 operations between 2023-11-17 to 2026-04-27
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| F91608 | 79.7% | 0.71% | -9 min | 6.8% | 283 |
| Frontier Airlines on DEN → MKE | 78.9% | 1.65% | -8 min | 8.1% | 425 |
| All DEN → MKE flights | 75.2% | 0.80% | -3 min | 8.4% | 7,721 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-11-17 to 2026-04-27
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
44 min late
against a median of 9 min early
Percentiles over 283 operations. Cancelled and diverted flights have no arrival time and are counted separately rather than as very late arrivals.
Why F91608 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 F91608 on DEN → MKE. 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 → MKE
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA1836 | United Airlines | 84.2% | 6 min early | 643 |
| OO4806 | SkyWest Airlines | 74.8% | 6 min early | 625 |
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 283 records of F91608 operating DEN → MKE, 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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