OnTimeStats

Historical on-time performance

COSDEN

Colorado Springs to Denver

73 miData through Dec 2025Source: US DOT · BTS

Flights on COS–DEN arrive on time 72% of the time over the last 12 months.

On-time rate72%arrived within 15 min
Median delayon timetypical arrival
p90 delay60 min1 in 10 flights is worsetail risk
Cancelled1.7%of scheduled flights

based on 5,285 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlines
    On-time65%
    Medianon time
    p9090 min
    Cancel1.2%
    Flights677
  • SkyWest Airlinesbest
    On-time73%
    Medianon time
    p9060 min
    Cancel2.2%
    Flights3,450
  • Southwest Airlines
    On-time72%
    Medianon time
    p9050 min
    Cancel0.5%
    Flights1,158

Why flights run late

Delay causes

  • Airline31%
  • Weather7%
  • Air traffic (NAS)36%
  • Late aircraft25%
  • Security0%

Most delay minutes here are attributed to Air traffic (NAS).

Over time

On-time trend

By season

On-time rate by month

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Related pages

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.