OnTimeStats

Historical on-time performance

Washington to New York

228 miData through May 2026Source: US DOT · BTS

Flights on IAD–JFK arrive on time 67% of the time over the last 12 months.

On-time rate67%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled1.6%of scheduled flights

based on 61 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Republic Airways
    On-time67%
    Medianon time
    p9050 min
    Cancel1.6%
    Flights61

Why flights run late

Delay causes

  • Airline17%
  • Weather4%
  • Air traffic (NAS)69%
  • Late aircraft11%
  • Security0%

Most delay minutes here are attributed to Air traffic (NAS).

When flights don't go

Why flights were cancelled

  • Airline100%
  • Weather0%
  • Air traffic (NAS)0%
  • Security0%

Most cancellations here are attributed to Airline. Shares are among 1 cancellations with a reported cause (BTS reports causes from June 2003).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly IAD → JFK

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 62% to 75% on time.

  • Middays75% on time · p90 45 min · 674 flights
  • Afternoons74% on time · p90 55 min · 168 flights · limited
  • Evenings62% on time · p90 105 min · 437 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 68% to 78% on time.

  • Tuesdays78% on time · p90 60 min · 194 flights · limited
  • Wednesdays75% on time · p90 60 min · 192 flights · limited
  • Mondays72% on time · p90 55 min · 195 flights · limited
  • Saturdays71% on time · p90 80 min · 194 flights · limited
  • Sundays70% on time · p90 55 min · 196 flights · limited
  • Fridays69% on time · p90 70 min · 193 flights · limited
  • Thursdays68% on time · p90 65 min · 193 flights · limited

Keep exploring

Related pages

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.