OnTimeStats

Historical on-time performance

Philadelphia to Grand Rapids

573 miData through May 2026Source: US DOT · BTS

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

On-time rate77%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled2.2%of scheduled flights

based on 138 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • PSA Airlines
    On-time77%
    Medianon time
    p9055 min
    Cancel2.2%
    Flights138

Why flights run late

Delay causes

  • Airline47%
  • Weather0%
  • Air traffic (NAS)6%
  • Late aircraft47%
  • Security0%

Most delay minutes here are attributed to Airline.

When flights don't go

Why flights were cancelled

  • Airline0%
  • Weather100%
  • Air traffic (NAS)0%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 3 cancellations with a reported cause (BTS reports causes from June 2003).

Over time

On-time trend

By season

On-time rate by month

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.