OnTimeStats

Historical on-time performance

PWMPHL

Portland to Philadelphia

365 miData through Dec 2025Source: US DOT · BTS

Flights on PWM–PHL arrive on time 73% of the time over the last 12 months.

On-time rate73%arrived within 15 min
Median delayon timetypical arrival
p90 delay45 min1 in 10 flights is worsetail risk
Cancelled2.1%of scheduled flights

based on 660 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • PSA Airlines
    On-time66%
    Medianon time
    p9035 min
    Cancel3.1%
    Flights64
  • American Airlinesbest
    On-time73%
    Medianon time
    p9045 min
    Cancel2.0%
    Flights596

Why flights run late

Delay causes

  • Airline34%
  • Weather3%
  • Air traffic (NAS)29%
  • Late aircraft34%
  • Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

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Keep exploring

Related pages

Delay predictorfor this route→PWM airportPortland→PHL airportPhiladelphia→PSA Airlines on this routecarrier detail→PSA Airlinesairline profile→

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.