OnTimeStats

Historical on-time performance

Detroit to Iron Mountain

344 miData through Dec 2025Source: US DOT · BTS

Flights on DTW–IMT arrive on time 77% of the time over the last 12 months.

On-time rate77%arrived within 15 min
p90 delay70 min1 in 10 flights is worse (tail risk)
Cancelled1.5%of scheduled flights

based on 337 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time77%
    Medianon time
    p9070 min
    Cancel1.5%
    Flights337

Why flights run late

Delay causes

  • Airline87%
  • Weather10%
  • Air traffic (NAS)3%
  • 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 → IMT

All airlines · rolling 36 months (2023-01 .. 2025-12).

Best time of day

Overnights are the most reliable time of day to fly this route — 90% on time.

  • Overnights90% on time · p90 10 min · 163 flights · limited
  • Middays78% on time · p90 70 min · 591 flights
  • Evenings72% on time · p90 110 min · 122 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 73% to 85% on time.

  • Wednesdays85% on time · p90 30 min · 131 flights · limited
  • Tuesdays82% on time · p90 50 min · 131 flights · limited
  • Thursdays80% on time · p90 60 min · 133 flights · limited
  • Saturdays80% on time · p90 60 min · 132 flights · limited
  • Mondays79% on time · p90 85 min · 132 flights · limited
  • Fridays75% on time · p90 60 min · 131 flights · limited
  • Sundays73% on time · p90 90 min · 132 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.