OnTimeStats

Historical on-time performance

Denver to Riverton WY

296 miData through Dec 2025Source: US DOT · BTS

Flights on DEN–RIW arrive on time 79% of the time over the last 12 months.

On-time rate79%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights

based on 729 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time79%
    Medianon time
    p9040 min
    Cancel0.5%
    Flights729

Why flights run late

Delay causes

  • Airline50%
  • Weather6%
  • Air traffic (NAS)13%
  • Late aircraft31%
  • 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 DEN → RIW

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 — 84% on time.

  • Middays84% on time · p90 25 min · 690 flights
  • Overnights80% on time · p90 40 min · 1,092 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 77% to 84% on time.

  • Wednesdays84% on time · p90 25 min · 253 flights
  • Sundays83% on time · p90 25 min · 248 flights
  • Mondays83% on time · p90 45 min · 249 flights
  • Tuesdays83% on time · p90 25 min · 240 flights
  • Saturdays82% on time · p90 30 min · 274 flights
  • Fridays77% on time · p90 45 min · 238 flights
  • Thursdays77% on time · p90 50 min · 283 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.