OnTimeStats

Historical on-time performance

Philadelphia to Miami

1,013 miData through May 2026Source: US DOT · BTS

Flights on PHL–MIA arrive on time 76% of the time over the last 12 months.

On-time rate76%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled1.8%of scheduled flights

based on 2,717 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.

  • American Airlines
    On-time77%
    Medianon time
    p9050 min
    Cancel1.8%
    Flights2,492
  • Frontier Airlines
    On-time66%
    Medianon time
    p9085 min
    Cancel2.1%
    Flights193
  • Spirit Airlines
    On-time66%
    Medianon time
    p9070 min
    Cancel3.1%
    Flights32

Why flights run late

Delay causes

  • Airline40%
  • Weather5%
  • Air traffic (NAS)20%
  • Late aircraft35%
  • Security0%

Most delay minutes here are attributed to Airline.

When flights don't go

Why flights were cancelled

  • Airline0%
  • Weather92%
  • Air traffic (NAS)8%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 50 cancellations with a reported cause (BTS reports causes from June 2003).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly PHL → MIA

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

Mornings are the most reliable time of day to fly this route — 82% on time.

  • Mornings82% on time · p90 30 min · 3,739 flights
  • Middays74% on time · p90 65 min · 2,213 flights
  • Afternoons74% on time · p90 65 min · 1,316 flights
  • Overnights72% on time · p90 60 min · 287 flights
  • Evenings63% on time · p90 80 min · 1,994 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 71% to 80% on time.

  • Tuesdays80% on time · p90 35 min · 1,268 flights
  • Wednesdays78% on time · p90 40 min · 1,259 flights
  • Fridays75% on time · p90 55 min · 1,419 flights
  • Thursdays73% on time · p90 55 min · 1,399 flights
  • Saturdays73% on time · p90 55 min · 1,369 flights
  • Mondays73% on time · p90 65 min · 1,399 flights
  • Sundays71% on time · p90 65 min · 1,436 flights

Keep exploring

Related pages

Methodology

A flight is on time when it arrives within 15 minutes of schedule — the US DOT / BTS standard. Median and p90(the “1-in-10 bad day”) are read from the full arrival-delay distribution, never averaged across periods.

Figures cover a carrier’s own BTS-coded flights. Cells below ~200 flights are flagged as limited data. All numbers are pre-computed from public BTS On-Time Performance data.