OnTimeStats

Historical on-time performance

Denver to Casper

230 miData through Dec 2025Source: US DOT · BTS

Flights on DEN–CPR arrive on time 74% of the time over the last 12 months.

On-time rate74%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights

based on 2,399 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time74%
    Medianon time
    p9065 min
    Cancel1.1%
    Flights2,399

Why flights run late

Delay causes

  • Airline30%
  • Weather10%
  • Air traffic (NAS)23%
  • Late aircraft37%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly DEN → CPR

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 66% to 83% on time.

  • Mornings83% on time · p90 30 min · 604 flights
  • Middays80% on time · p90 40 min · 1,648 flights
  • Overnights75% on time · p90 50 min · 662 flights
  • Afternoons73% on time · p90 50 min · 788 flights
  • Evenings66% on time · p90 80 min · 1,125 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 74% to 78% on time.

  • Tuesdays78% on time · p90 40 min · 692 flights
  • Saturdays76% on time · p90 50 min · 681 flights
  • Wednesdays76% on time · p90 70 min · 691 flights
  • Mondays75% on time · p90 50 min · 695 flights
  • Thursdays75% on time · p90 60 min · 682 flights
  • Sundays75% on time · p90 55 min · 698 flights
  • Fridays74% on time · p90 60 min · 690 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.