Flight profile · American Airlines
AA1252
Philadelphia (PHL) to Miami (MIA) · scheduled 6:00 AM – 8:54 AM
How AA1252 performs
274 operations, 2025-03-30 to 2026-06-30.
AA1252 arrived on time 89.5% of the time, against 76.6% for all PHL → MIA flights — this specific departure is 12.9 percentage points better than the route as a whole. Against American Airlines’s own flights on this route it is 11.7 points better.
Source: US DOT Bureau of Transportation Statistics · 274 operations between 2025-03-30 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AA1252 | 89.5% | 2.92% | -13 min | 4.5% | 274 |
| American Airlines on PHL → MIA | 77.8% | 1.69% | -8 min | 8.3% | 7,509 |
| All PHL → MIA flights | 76.6% | 1.71% | -8 min | 9.2% | 9,567 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-03-30 to 2026-06-30
Other routes AA1252 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 |
|---|---|---|---|
| PIT→ORD Pittsburgh to Chicago | 2026-03-08 – 2026-04-06 | 26 | — |
| ORD→PBI Chicago to West Palm Beach | 2026-03-14 – 2026-04-04 | 4 | — |
| PBI→ORD West Palm Beach to Chicago | 2026-03-14 – 2026-04-04 | 4 | — |
| MIA→DCA Miami to Washington | 2024-04-04 – 2026-03-07 | 316 | 86.7% |
| STT→JFK Charlotte Amalie to New York | 2025-12-20 – 2026-01-03 | 3 | — |
| RNO→PHX Reno to Phoenix | 2025-12-03 – 2025-12-17 | 15 | — |
| CLT→BOS Charlotte to Boston | 2025-11-22 – 2025-11-29 | 2 | — |
| DCA→MIA Washington to Miami | 2024-04-04 – 2025-11-27 | 215 | 82.3% |
| DFW→SMF Dallas–Fort Worth to Sacramento | 2023-07-01 – 2025-03-29 | 332 | 65.5% |
| DFW→SLC Dallas–Fort Worth to Salt Lake City | 2024-02-15 – 2024-04-03 | 49 | — |
| ORD→MCO Chicago to Orlando | 2024-01-11 – 2024-02-11 | 15 | — |
Because the same number has served different journeys, the statistics above describe only the route AA1252 currently operates. Blending them would produce an average of two different flights.
Why AA1252 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
screening or terminal security incidents
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for AA1252 on PHL → MIA. 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 PHL → MIA
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| F91203 | Frontier Airlines | 68.9% | 6 min early | 607 |
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 274 records of AA1252 operating PHL → MIA, 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.