OnTimeStats

Historical on-time performance

Portland to Nashville

1,010 miData through Dec 2025Source: US DOT · BTS

Flights on PWM–BNA arrive on time 69% of the time over the last 12 months.

On-time rate69%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 123 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time69%
    Medianon time
    p9055 min
    Cancel0.0%
    Flights123

Why flights run late

Delay causes

  • Airline16%
  • Weather1%
  • Air traffic (NAS)18%
  • Late aircraft65%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly PWM → BNA

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

Best time of day

Middays are the most reliable time of day to fly this route — 81% on time.

  • Middays81% on time · p90 15 min · 64 flights · limited
  • Afternoons67% on time · p90 45 min · 149 flights · limited
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Keep exploring

Related pages

Delay predictorfor this route→PWM airportPortland→BNA airportNashville→Southwest Airlines on this routecarrier detail→Southwest 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.