OnTimeStats

Historical on-time performance

New York to Washington

228 miData through Dec 2025Source: US DOT · BTS

Flights on JFK–IAD arrive on time 83% of the time over the last 12 months.

On-time rate83%arrived within 15 min
p90 delay15 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 30 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time83%
    Medianon time
    p9015 min
    Cancel0.0%
    Flights30

Why flights run late

Delay causes

  • Airline75%
  • Weather12%
  • Air traffic (NAS)13%
  • Late aircraft0%
  • 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 JFK → IAD

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 59% to 87% on time.

  • Mornings87% on time · p90 15 min · 341 flights
  • Middays84% on time · p90 30 min · 507 flights
  • Evenings76% on time · p90 35 min · 68 flights · limited
  • Afternoons73% on time · p90 85 min · 731 flights
  • Overnights59% on time · p90 95 min · 156 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 68% to 83% on time.

  • Thursdays83% on time · p90 55 min · 255 flights
  • Wednesdays82% on time · p90 35 min · 256 flights
  • Tuesdays80% on time · p90 30 min · 259 flights
  • Sundays79% on time · p90 55 min · 261 flights
  • Mondays79% on time · p90 35 min · 259 flights
  • Saturdays72% on time · p90 75 min · 257 flights
  • Fridays68% on time · p90 70 min · 256 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.