OnTimeStats

Historical on-time performance

Denver to Detroit

1,123 miData through Dec 2025Source: US DOT · BTS

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

On-time rate76%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights

based on 2,875 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Delta Air Linesbest
    On-time82%
    Medianon time
    p9030 min
    Cancel0.4%
    Flights1,226
  • United Airlines
    On-time78%
    Medianon time
    p9045 min
    Cancel0.0%
    Flights727
  • Frontier Airlines
    On-time75%
    Medianon time
    p9060 min
    Cancel0.0%
    Flights274
  • Southwest Airlines
    On-time62%
    Median5 min
    p9070 min
    Cancel0.8%
    Flights648

Why flights run late

Delay causes

  • Airline34%
  • Weather2%
  • Air traffic (NAS)10%
  • Late aircraft53%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly DEN → DTW

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 65% to 85% on time.

  • Mornings85% on time · p90 20 min · 2,139 flights
  • Early mornings85% on time · p90 25 min · 636 flights
  • Middays79% on time · p90 35 min · 2,592 flights
  • Afternoons75% on time · p90 40 min · 1,543 flights
  • Overnights65% on time · p90 90 min · 160 flights · limited
  • Evenings65% on time · p90 80 min · 1,855 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 74% to 78% on time.

  • Saturdays78% on time · p90 40 min · 1,223 flights
  • Tuesdays78% on time · p90 35 min · 1,262 flights
  • Wednesdays78% on time · p90 40 min · 1,215 flights
  • Mondays77% on time · p90 40 min · 1,327 flights
  • Sundays77% on time · p90 45 min · 1,264 flights
  • Thursdays75% on time · p90 45 min · 1,305 flights
  • Fridays74% on time · p90 45 min · 1,329 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.