OnTimeStats

Historical on-time performance

Detroit to Denver

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

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

On-time rate77%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.4%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

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

  • Delta Air Lines
    On-time74%
    Medianon time
    p9045 min
    Cancel0.2%
    Flights1,226
  • United Airlines
    On-time80%
    Medianon time
    p9035 min
    Cancel0.6%
    Flights727
  • Frontier Airlines
    On-time83%
    Medianon time
    p9035 min
    Cancel0.4%
    Flights274
  • Southwest Airlines
    On-time75%
    Medianon time
    p9045 min
    Cancel0.6%
    Flights648

Why flights run late

Delay causes

  • Airline36%
  • Weather2%
  • Air traffic (NAS)39%
  • Late aircraft23%
  • Security0%

Most delay minutes here are attributed to Air traffic (NAS).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly DTW → DEN

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

Best time of day

Mornings are the most reliable time of day to fly this route — 87% on time.

  • Mornings87% on time · p90 20 min · 3,225 flights
  • Middays83% on time · p90 25 min · 1,866 flights
  • Afternoons74% on time · p90 50 min · 2,366 flights
  • Overnights67% on time · p90 70 min · 962 flights
  • Evenings61% on time · p90 75 min · 513 flights

Best day of week

Tuesdays are the most reliable day to fly this route — 83% on time.

  • Tuesdays83% on time · p90 25 min · 1,231 flights
  • Mondays80% on time · p90 35 min · 1,327 flights
  • Sundays79% on time · p90 35 min · 1,350 flights
  • Wednesdays79% on time · p90 35 min · 1,220 flights
  • Fridays78% on time · p90 40 min · 1,330 flights
  • Saturdays78% on time · p90 35 min · 1,140 flights
  • Thursdays76% on time · p90 40 min · 1,334 flights
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Keep exploring

Related pages

Delay predictorfor this route→DTW airportDetroit→DEN airportDenver→Delta Air Lines on this routecarrier detail→Delta Air Linesairline profile→

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.