OnTimeStats

Historical on-time performance

Norfolk to Washington

157 miData through May 2026Source: US DOT · BTS

Flights on ORF–IAD arrive on time 88% of the time over the last 12 months.

On-time rate88%arrived within 15 min
p90 delay10 min1 in 10 flights is worse (tail risk)
Cancelled2.9%of scheduled flights

based on 449 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.

  • United Airlines
    On-time95%
    Medianon time
    p905 min
    Cancel0.5%
    Flights185
  • Republic Airways
    On-time83%
    Medianon time
    p9020 min
    Cancel4.5%
    Flights264

Why flights run late

Delay causes

  • Airline28%
  • Weather1%
  • Air traffic (NAS)19%
  • Late aircraft51%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline0%
  • Weather54%
  • Air traffic (NAS)46%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 13 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 ORF → IAD

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 77% to 89% on time.

  • Evenings89% on time · p90 10 min · 315 flights
  • Middays88% on time · p90 15 min · 316 flights
  • Mornings87% on time · p90 15 min · 862 flights
  • Overnights79% on time · p90 30 min · 174 flights · limited
  • Afternoons77% on time · p90 30 min · 329 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 81% to 89% on time.

  • Wednesdays89% on time · p90 10 min · 303 flights
  • Tuesdays86% on time · p90 15 min · 294 flights
  • Sundays86% on time · p90 15 min · 272 flights
  • Saturdays86% on time · p90 20 min · 217 flights
  • Fridays85% on time · p90 20 min · 290 flights
  • Thursdays83% on time · p90 35 min · 307 flights
  • Mondays81% on time · p90 30 min · 313 flights

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.