OnTimeStats

Historical on-time performance

Washington to Greensboro

248 miData through Dec 2025Source: US DOT · BTS

Flights on DCA–GSO arrive on time 61% of the time over the last 12 months.

On-time rate61%arrived within 15 min
p90 delay90 min1 in 10 flights is worse (tail risk)
Cancelled5.6%of scheduled flights

based on 659 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • PSA Airlinesbest
    On-time62%
    Medianon time
    p9090 min
    Cancel4.6%
    Flights613
  • Envoy Air
    On-time43%
    Median10 min
    p90220 min
    Cancel19.6%
    Flights46

Why flights run late

Delay causes

  • Airline31%
  • Weather9%
  • Air traffic (NAS)15%
  • Late aircraft46%
  • 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 DCA → GSO

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

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 63% to 86% on time.

  • Mornings86% on time · p90 15 min · 667 flights
  • Middays82% on time · p90 40 min · 299 flights
  • Evenings74% on time · p90 55 min · 337 flights
  • Afternoons68% on time · p90 70 min · 374 flights
  • Overnights63% on time · p90 80 min · 832 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 69% to 82% on time.

  • Saturdays82% on time · p90 35 min · 266 flights
  • Tuesdays77% on time · p90 40 min · 387 flights
  • Mondays75% on time · p90 55 min · 391 flights
  • Thursdays73% on time · p90 65 min · 376 flights
  • Wednesdays72% on time · p90 55 min · 385 flights
  • Fridays69% on time · p90 60 min · 378 flights
  • Sundays69% on time · p90 75 min · 326 flights
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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.