OnTimeStats

Historical on-time performance

Washington to Norfolk

157 miData through May 2026Source: US DOT · BTS

Flights on IAD–ORF arrive on time 80% of the time over the last 12 months.

On-time rate80%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled2.9%of scheduled flights

based on 448 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-time87%
    Medianon time
    p9020 min
    Cancel0.5%
    Flights184
  • Republic Airways
    On-time75%
    Medianon time
    p9050 min
    Cancel4.5%
    Flights264

Why flights run late

Delay causes

  • Airline38%
  • Weather0%
  • Air traffic (NAS)8%
  • Late aircraft53%
  • 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 IAD → ORF

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 75% to 91% on time.

  • Mornings91% on time · p90 5 min · 283 flights
  • Middays91% on time · p90 10 min · 292 flights
  • Evenings78% on time · p90 35 min · 534 flights
  • Overnights75% on time · p90 35 min · 820 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 76% to 87% on time.

  • Wednesdays87% on time · p90 15 min · 298 flights
  • Tuesdays86% on time · p90 15 min · 291 flights
  • Mondays82% on time · p90 30 min · 300 flights
  • Fridays79% on time · p90 35 min · 275 flights
  • Thursdays78% on time · p90 30 min · 307 flights
  • Sundays76% on time · p90 40 min · 276 flights
  • Saturdays76% on time · p90 35 min · 211 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.