OnTimeStats

Historical on-time performance

Atlanta to Aspen

1,304 miData through Dec 2025Source: US DOT · BTS

Flights on ATL–ASE arrive on time 65% of the time over the last 12 months.

On-time rate65%arrived within 15 min
p90 delay80 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights

based on 419 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time65%
    Medianon time
    p9080 min
    Cancel1.0%
    Flights419

Why flights run late

Delay causes

  • Airline49%
  • Weather32%
  • Air traffic (NAS)19%
  • Late aircraft0%
  • 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 ATL → ASE

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 — 67% on time.

  • Mornings67% on time · p90 45 min · 578 flights
  • Middays59% on time · p90 90 min · 547 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 53% to 70% on time.

  • Tuesdays70% on time · p90 45 min · 160 flights · limited
  • Mondays67% on time · p90 45 min · 161 flights · limited
  • Wednesdays65% on time · p90 55 min · 160 flights · limited
  • Fridays65% on time · p90 50 min · 159 flights · limited
  • Thursdays65% on time · p90 60 min · 159 flights · limited
  • Sundays59% on time · p90 75 min · 165 flights · limited
  • Saturdays53% on time · p90 105 min · 163 flights · limited
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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.