OnTimeStats

Historical on-time performance

Detroit to Grand Rapids

120 miData through Dec 2025Source: US DOT · BTS

Flights on DTW–GRR arrive on time 76% of the time over the last 12 months.

On-time rate76%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights

based on 1,292 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Too close to call — no single carrier is clearly more on-time here.

  • Delta Air Lines
    On-time77%
    Medianon time
    p9025 min
    Cancel0.0%
    Flights62
  • SkyWest Airlines
    On-time76%
    Medianon time
    p9070 min
    Cancel0.7%
    Flights1,230

Why flights run late

Delay causes

  • Airline65%
  • Weather22%
  • Air traffic (NAS)12%
  • 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 → GRR

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 69% to 85% on time.

  • Mornings85% on time · p90 25 min · 899 flights
  • Middays85% on time · p90 30 min · 944 flights
  • Afternoons78% on time · p90 50 min · 1,117 flights
  • Overnights70% on time · p90 60 min · 995 flights
  • Evenings69% on time · p90 105 min · 433 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 75% to 81% on time.

  • Saturdays81% on time · p90 35 min · 606 flights
  • Tuesdays80% on time · p90 30 min · 625 flights
  • Thursdays80% on time · p90 50 min · 628 flights
  • Wednesdays78% on time · p90 45 min · 626 flights
  • Sundays77% on time · p90 65 min · 637 flights
  • Mondays77% on time · p90 65 min · 640 flights
  • Fridays75% on time · p90 55 min · 626 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.