OnTimeStats

Historical on-time performance

Morgantown to Washington

140 miData through Dec 2025Source: US DOT · BTS

Flights on MGW–IAD arrive on time 77% of the time over the last 12 months.

On-time rate77%arrived within 15 min
p90 delay105 min1 in 10 flights is worse (tail risk)
Cancelled3.3%of scheduled flights

based on 306 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time77%
    Medianon time
    p90105 min
    Cancel3.3%
    Flights306

Why flights run late

Delay causes

  • Airline53%
  • Weather5%
  • Air traffic (NAS)2%
  • Late aircraft39%
  • 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 MGW → IAD

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

Best day of week

On-time rates are fairly even by day on this route — ranging from 69% to 80% on time.

  • Tuesdays80% on time · p90 15 min · 55 flights · limited
  • Saturdays78% on time · p90 40 min · 55 flights · limited
  • Sundays78% on time · p90 80 min · 55 flights · limited
  • Fridays76% on time · p90 35 min · 54 flights · limited
  • Mondays71% on time · p90 180 min · 55 flights · limited
  • Thursdays70% on time · p90 280 min · 53 flights · limited
  • Wednesdays69% on time · p90 275 min · 54 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.