OnTimeStats

Historical on-time performance

Missoula to Denver

679 miData through May 2026Source: US DOT · BTS

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

On-time rate79%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights

based on 1,135 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time83%
    Medianon time
    p9035 min
    Cancel0.3%
    Flights718
  • SkyWest Airlines
    On-time71%
    Medianon time
    p9065 min
    Cancel1.0%
    Flights417

Why flights run late

Delay causes

  • Airline32%
  • Weather9%
  • Air traffic (NAS)39%
  • Late aircraft19%
  • Security0%

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

When flights don't go

Why flights were cancelled

  • Airline17%
  • Weather83%
  • Air traffic (NAS)0%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 6 cancellations with a reported cause (BTS reports causes from June 2003).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly MSO → DEN

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 69% to 86% on time.

  • Middays86% on time · p90 20 min · 286 flights
  • Mornings84% on time · p90 25 min · 1,089 flights
  • Afternoons73% on time · p90 65 min · 1,196 flights
  • Evenings69% on time · p90 75 min · 851 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 73% to 79% on time.

  • Wednesdays79% on time · p90 40 min · 491 flights
  • Saturdays78% on time · p90 45 min · 481 flights
  • Tuesdays78% on time · p90 50 min · 466 flights
  • Fridays76% on time · p90 60 min · 518 flights
  • Sundays76% on time · p90 45 min · 474 flights
  • Thursdays75% on time · p90 80 min · 474 flights
  • Mondays73% on time · p90 60 min · 520 flights

Keep exploring

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.