Flight profile · Frontier Airlines
F91238
Orlando (MCO) to Islip (ISP) · scheduled 6:00 AM – 7:40 AM
How F91238 performs
436 operations, 2023-11-16 to 2026-04-11.
F91238 arrived on time 89.8% of the time, against 76.6% for all MCO → ISP flights — this specific departure is 13.2 percentage points better than the route as a whole. Against Frontier Airlines’s own flights on this route it is 11.6 points better.
Source: US DOT Bureau of Transportation Statistics · 436 operations between 2023-11-16 to 2026-04-11
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| F91238 | 89.8% | 0.92% | -13 min | 3.3% | 436 |
| Frontier Airlines on MCO → ISP | 78.2% | 1.96% | -8 min | 9.0% | 1,630 |
| All MCO → ISP flights | 76.6% | 1.39% | -5 min | 7.5% | 4,258 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-11-16 to 2026-04-11
Other routes F91238 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.
| Route | Operated | Flights | On time |
|---|---|---|---|
| PHL→ISP Philadelphia to Islip | 2023-12-17 – 2023-12-17 | 1 | — |
| MCO→BOS Orlando to Boston | 2023-07-02 – 2023-11-15 | 99 | 88.9% |
Because the same number has served different journeys, the statistics above describe only the route F91238 currently operates. Blending them would produce an average of two different flights.
Why F91238 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
the inbound aircraft was late, so this flight started late
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 F91238 on MCO → ISP. 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 MCO → ISP
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| B6546 | JetBlue | 88.5% | 8 min early | 614 |
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 436 records of F91238 operating MCO → ISP, 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.