Best Time to Fly MIA to PHL: On-Time Stats by Hour & Airline
Miami International → Philadelphia International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.5% of Miami (MIA) to Philadelphia (PHL) flights arrived on time (3,249 scheduled flights). That is 2.2 points below the national average of 77.6%.
American Airlines was the most punctual of the 3 airlines on the route at 76.1%, while Frontier Airlines trailed at 71.2%.
October has been the best month (84% on time) and Sunday the weakest day of the week (69%).
2.8% of flights were cancelled, versus 1.8% nationally.
MIA to PHL on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| American Airlines | 76.1% | 81 min | 2.6% | 2,665 |
| Spirit Airlines | 74.5% | 62 min | 4.5% | 222 |
| Frontier Airlines | 71.2% | 88 min | 3.0% | 362 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MIA to PHL
On-time arrival % by scheduled departure hour (local time), 6,393 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 97.1% | 2.8% | 36 |
| 6am–7am | 91.7% | 1.4% | 649 |
| 7am–8am | 89.0% | 2.9% | 244 |
| 8am–9am | 89.0% | 0.3% | 583 |
| 9am–10am | 87.6% | 0.5% | 437 |
| 10am–11am | 80.5% | 1.7% | 116 |
| 11am–12pm | 75.0% | 0.0% | 144 |
| 12pm–1pm | 80.6% | 2.7% | 74 |
| 1pm–2pm | 73.2% | 2.3% | 308 |
| 2pm–3pm | 70.3% | 1.7% | 518 |
| 3pm–4pm | 67.7% | 6.4% | 235 |
| 4pm–5pm | 66.1% | 2.4% | 409 |
| 5pm–6pm | 66.7% | 3.7% | 456 |
| 6pm–7pm | 68.2% | 4.1% | 416 |
| 7pm–8pm | 73.3% | 1.3% | 451 |
| 8pm–9pm | 66.0% | 3.7% | 297 |
| 9pm–10pm | 69.8% | 2.7% | 887 |
| 10pm–11pm | 67.2% | 6.0% | 133 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MIA to PHL
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 75.8% | -2.6 pts | 0.0% | 120 |
| Christmas & New Year (Dec 20 - Jan 3) | 68.9% | -9.5 pts | 2.7% | 295 |
| Summer peak (Jun 15 - Aug 15) | 66.4% | -12.0 pts | 4.4% | 1,056 |
| All other days | 78.4% | — | 1.9% | 4,922 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).