OnTimeStats

Historical on-time performance

Los Angeles to Aspen

737 miData through Dec 2025Source: US DOT · BTS

Flights on LAX–ASE arrive on time 68% of the time over the last 12 months.

On-time rate68%arrived within 15 min
p90 delay90 min1 in 10 flights is worse (tail risk)
Cancelled1.6%of scheduled flights

based on 1,127 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time68%
    Medianon time
    p9090 min
    Cancel1.6%
    Flights1,127

Why flights run late

Delay causes

  • Airline46%
  • Weather14%
  • Air traffic (NAS)24%
  • Late aircraft16%
  • 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 LAX → ASE

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 62% to 74% on time.

  • Afternoons74% on time · p90 60 min · 715 flights
  • Evenings66% on time · p90 175 min · 70 flights · limited
  • Middays64% on time · p90 70 min · 1,083 flights
  • Mornings62% on time · p90 80 min · 1,373 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 59% to 72% on time.

  • Tuesdays72% on time · p90 50 min · 424 flights
  • Wednesdays70% on time · p90 65 min · 458 flights
  • Mondays66% on time · p90 75 min · 468 flights
  • Fridays64% on time · p90 65 min · 471 flights
  • Thursdays64% on time · p90 75 min · 466 flights
  • Sundays62% on time · p90 85 min · 478 flights
  • Saturdays59% on time · p90 110 min · 476 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.