OnTimeStats

Historical on-time performance

Detroit to Los Angeles

1,979 miData through Dec 2025Source: US DOT · BTS

Flights on DTW–LAX 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)
Cancelled0.6%of scheduled flights

based on 2,688 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Delta Air Lines
    On-time78%
    Medianon time
    p9035 min
    Cancel0.6%
    Flights1,975
  • Spirit Airlinesbest
    On-time84%
    Medianon time
    p9025 min
    Cancel0.7%
    Flights713

Why flights run late

Delay causes

  • Airline53%
  • Weather4%
  • Air traffic (NAS)21%
  • Late aircraft21%
  • Security1%

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 → LAX

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 — 88% on time.

  • Mornings88% on time · p90 15 min · 2,287 flights
  • Middays84% on time · p90 25 min · 1,574 flights
  • Afternoons80% on time · p90 35 min · 1,395 flights
  • Evenings78% on time · p90 40 min · 1,225 flights
  • Overnights70% on time · p90 55 min · 1,743 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 77% to 85% on time.

  • Wednesdays85% on time · p90 20 min · 1,126 flights
  • Tuesdays84% on time · p90 25 min · 1,134 flights
  • Thursdays80% on time · p90 35 min · 1,204 flights
  • Saturdays80% on time · p90 35 min · 1,116 flights
  • Fridays79% on time · p90 35 min · 1,222 flights
  • Mondays78% on time · p90 40 min · 1,226 flights
  • Sundays77% on time · p90 40 min · 1,196 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.