OnTimeStats

Historical on-time performance

Detroit to Kalamazoo

113 miData through Dec 2025Source: US DOT · BTS

Flights on DTW–AZO arrive on time 78% of the time over the last 12 months.

On-time rate78%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled1.5%of scheduled flights

based on 1,003 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time78%
    Medianon time
    p9065 min
    Cancel1.5%
    Flights1,003

Why flights run late

Delay causes

  • Airline79%
  • Weather16%
  • 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 → AZO

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 79% to 83% on time.

  • Overnights83% on time · p90 40 min · 1,069 flights
  • Middays81% on time · p90 55 min · 947 flights
  • Afternoons79% on time · p90 55 min · 760 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 79% to 85% on time.

  • Saturdays85% on time · p90 25 min · 322 flights
  • Tuesdays82% on time · p90 35 min · 417 flights
  • Fridays81% on time · p90 50 min · 413 flights
  • Wednesdays81% on time · p90 45 min · 419 flights
  • Mondays80% on time · p90 55 min · 419 flights
  • Thursdays80% on time · p90 55 min · 416 flights
  • Sundays79% on time · p90 45 min · 412 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.