OnTimeStats

Historical on-time performance

Philadelphia to Grand Rapids

573 miData through Dec 2025Source: US DOT · BTS

Flights on PHL–GRR arrive on time 78% of the time over the last 12 months.

On-time rate78%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled2.1%of scheduled flights

based on 97 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • PSA Airlines
    On-time78%
    Medianon time
    p9055 min
    Cancel2.1%
    Flights97

Why flights run late

Delay causes

  • Airline51%
  • Weather0%
  • Air traffic (NAS)7%
  • Late aircraft42%
  • 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 PHL → GRR

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 — 93% on time.

  • Mornings93% on time · p90 on time · 60 flights · limited
  • Overnights69% on time · p90 90 min · 94 flights · limited
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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.