OnTimeStats

Historical on-time performance

Detroit to Philadelphia

453 miData through Dec 2025Source: US DOT · BTS

Flights on DTW–PHL arrive on time 77% of the time over the last 12 months.

On-time rate77%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled1.9%of scheduled flights

based on 2,513 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Too close to call — no single carrier is clearly more on-time here.

  • Republic Airways
    On-time66%
    Medianon time
    p90105 min
    Cancel5.3%
    Flights94
  • PSA Airlines
    On-time73%
    Medianon time
    p9065 min
    Cancel5.3%
    Flights529
  • Delta Air Lines
    On-time80%
    Medianon time
    p9050 min
    Cancel0.6%
    Flights1,493
  • SkyWest Airlines
    On-time82%
    Medianon time
    p9025 min
    Cancel0.0%
    Flights33
  • American Airlines
    On-time69%
    Medianon time
    p9080 min
    Cancel1.9%
    Flights263
  • Spirit Airlines
    On-time84%
    Medianon time
    p9030 min
    Cancel2.0%
    Flights101

Why flights run late

Delay causes

  • Airline39%
  • Weather4%
  • Air traffic (NAS)23%
  • Late aircraft34%
  • Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly DTW → PHL

All airlines · rolling 36 months (2023-01 .. 2025-12).

Best time of day

Mornings are the most reliable time of day to fly this route — 87% on time.

  • Mornings87% on time · p90 15 min · 2,710 flights
  • Middays84% on time · p90 30 min · 2,195 flights
  • Overnights79% on time · p90 45 min · 1,232 flights
  • Afternoons74% on time · p90 55 min · 1,978 flights
  • Evenings66% on time · p90 80 min · 862 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 78% to 84% on time.

  • Tuesdays84% on time · p90 20 min · 1,195 flights
  • Wednesdays83% on time · p90 30 min · 1,209 flights
  • Mondays80% on time · p90 45 min · 1,360 flights
  • Thursdays80% on time · p90 40 min · 1,362 flights
  • Saturdays80% on time · p90 35 min · 1,136 flights
  • Fridays79% on time · p90 45 min · 1,353 flights
  • Sundays78% on time · p90 50 min · 1,362 flights
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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.