OnTimeStats

Historical on-time performance

Detroit to Birmingham

625 miData through Dec 2025Source: US DOT · BTS

Flights on DTW–BHM arrive on time 69% of the time over the last 12 months.

On-time rate69%arrived within 15 min
p90 delay90 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights

based on 99 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time69%
    Medianon time
    p9090 min
    Cancel1.0%
    Flights99

Why flights run late

Delay causes

  • Airline84%
  • Weather12%
  • Air traffic (NAS)4%
  • Late aircraft0%
  • 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 → BHM

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 71% to 85% on time.

  • Middays85% on time · p90 35 min · 92 flights · limited
  • Mornings78% on time · p90 60 min · 97 flights · limited
  • Overnights78% on time · p90 55 min · 206 flights
  • Afternoons76% on time · p90 50 min · 670 flights
  • Evenings71% on time · p90 70 min · 156 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 71% to 83% on time.

  • Saturdays83% on time · p90 45 min · 108 flights · limited
  • Tuesdays80% on time · p90 45 min · 171 flights · limited
  • Thursdays79% on time · p90 40 min · 185 flights · limited
  • Fridays76% on time · p90 65 min · 202 flights
  • Wednesdays74% on time · p90 45 min · 175 flights · limited
  • Mondays74% on time · p90 70 min · 202 flights
  • Sundays71% on time · p90 65 min · 178 flights · limited
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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.