OnTimeStats

Historical on-time performance

Denver to Hays

298 miData through Dec 2025Source: US DOT · BTS

Flights on DEN–HYS arrive on time 75% of the time over the last 12 months.

On-time rate75%arrived within 15 min
p90 delay80 min1 in 10 flights is worse (tail risk)
Cancelled2.1%of scheduled flights

based on 627 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time75%
    Medianon time
    p9080 min
    Cancel2.1%
    Flights627

Why flights run late

Delay causes

  • Airline33%
  • Weather5%
  • Air traffic (NAS)12%
  • Late aircraft49%
  • 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 → HYS

All airlines · rolling 36 months (2023-01 .. 2025-12).

Best time of day

Middays are the most reliable time of day to fly this route — 89% on time.

  • Middays89% on time · p90 15 min · 56 flights · limited
  • Overnights79% on time · p90 70 min · 608 flights
  • Afternoons73% on time · p90 65 min · 360 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 70% to 83% on time.

  • Wednesdays83% on time · p90 30 min · 174 flights · limited
  • Thursdays80% on time · p90 65 min · 170 flights · limited
  • Tuesdays79% on time · p90 70 min · 95 flights · limited
  • Mondays77% on time · p90 75 min · 176 flights · limited
  • Sundays76% on time · p90 60 min · 174 flights · limited
  • Fridays76% on time · p90 45 min · 173 flights · limited
  • Saturdays70% on time · p90 125 min · 94 flights · limited
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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.