OnTimeStats

Historical on-time performance

Detroit to Las Vegas

1,750 miData through Dec 2025Source: US DOT · BTS

Flights on DTW–LAS arrive on time 80% of the time over the last 12 months.

On-time rate80%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights

based on 2,926 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.

  • Southwest Airlines
    On-time80%
    Medianon time
    p9020 min
    Cancel0.0%
    Flights213
  • Delta Air Lines
    On-time78%
    Medianon time
    p9040 min
    Cancel0.3%
    Flights1,926
  • Spirit Airlines
    On-time85%
    Medianon time
    p9025 min
    Cancel0.1%
    Flights787

Why flights run late

Delay causes

  • Airline51%
  • Weather2%
  • Air traffic (NAS)30%
  • Late aircraft17%
  • 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 → LAS

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 74% to 85% on time.

  • Mornings85% on time · p90 20 min · 2,389 flights
  • Middays83% on time · p90 25 min · 1,951 flights
  • Overnights75% on time · p90 50 min · 2,255 flights
  • Evenings74% on time · p90 50 min · 1,562 flights
  • Afternoons74% on time · p90 45 min · 1,393 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 74% to 85% on time.

  • Tuesdays85% on time · p90 25 min · 1,278 flights
  • Wednesdays83% on time · p90 30 min · 1,284 flights
  • Saturdays80% on time · p90 30 min · 1,323 flights
  • Mondays78% on time · p90 40 min · 1,422 flights
  • Sundays77% on time · p90 40 min · 1,437 flights
  • Thursdays75% on time · p90 50 min · 1,398 flights
  • Fridays74% on time · p90 50 min · 1,408 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.