OnTimeStats

Historical on-time performance

Detroit to Raleigh-durham

501 miData through Dec 2025Source: US DOT · BTS

Flights on DTW–RDU arrive on time 84% of the time over the last 12 months.

On-time rate84%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights

based on 1,364 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Delta Air Lines
    On-time84%
    Medianon time
    p9030 min
    Cancel0.4%
    Flights1,364

Why flights run late

Delay causes

  • Airline58%
  • Weather4%
  • Air traffic (NAS)16%
  • Late aircraft22%
  • 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 DTW → RDU

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 75% to 88% on time.

  • Mornings88% on time · p90 15 min · 955 flights
  • Middays87% on time · p90 20 min · 1,119 flights
  • Afternoons83% on time · p90 30 min · 1,214 flights
  • Overnights78% on time · p90 45 min · 1,144 flights
  • Evenings75% on time · p90 40 min · 151 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 79% to 87% on time.

  • Tuesdays87% on time · p90 20 min · 641 flights
  • Wednesdays87% on time · p90 20 min · 641 flights
  • Mondays86% on time · p90 20 min · 689 flights
  • Thursdays83% on time · p90 25 min · 693 flights
  • Saturdays82% on time · p90 35 min · 549 flights
  • Fridays81% on time · p90 40 min · 679 flights
  • Sundays79% on time · p90 40 min · 691 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.