OnTimeStats

Historical on-time performance

Newark to Washington

213 miData through Dec 2025Source: US DOT · BTS

Flights on EWR–IAD arrive on time 69% of the time over the last 12 months.

On-time rate69%arrived within 15 min
p90 delay80 min1 in 10 flights is worse (tail risk)
Cancelled1.4%of scheduled flights

based on 1,388 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlines
    On-time69%
    Medianon time
    p9080 min
    Cancel1.4%
    Flights1,388

Why flights run late

Delay causes

  • Airline22%
  • Weather5%
  • Air traffic (NAS)25%
  • Late aircraft48%
  • 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 EWR → IAD

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

Best time of day

Mornings are the most reliable time of day to fly this route — 91% on time.

  • Mornings91% on time · p90 5 min · 1,034 flights
  • Middays81% on time · p90 30 min · 352 flights
  • Overnights66% on time · p90 80 min · 826 flights
  • Afternoons62% on time · p90 80 min · 1,318 flights
  • Evenings61% on time · p90 95 min · 1,218 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 68% to 75% on time.

  • Tuesdays75% on time · p90 50 min · 695 flights
  • Wednesdays71% on time · p90 70 min · 690 flights
  • Mondays71% on time · p90 75 min · 695 flights
  • Thursdays70% on time · p90 65 min · 679 flights
  • Saturdays69% on time · p90 80 min · 617 flights
  • Fridays68% on time · p90 75 min · 685 flights
  • Sundays68% on time · p90 70 min · 687 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.