OnTimeStats

Historical on-time performance

Denver to Idaho Falls

458 miData through May 2026Source: US DOT · BTS

Flights on DEN–IDA arrive on time 78% of the time over the last 12 months.

On-time rate78%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights

based on 1,662 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.

  • United Airlines
    On-time80%
    Medianon time
    p9040 min
    Cancel0.0%
    Flights92
  • SkyWest Airlines
    On-time78%
    Medianon time
    p9050 min
    Cancel0.8%
    Flights1,570

Why flights run late

Delay causes

  • Airline38%
  • Weather7%
  • Air traffic (NAS)21%
  • Late aircraft34%
  • Security0%

Most delay minutes here are attributed to Airline.

When flights don't go

Why flights were cancelled

  • Airline0%
  • Weather83%
  • Air traffic (NAS)17%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 12 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 DEN → IDA

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

Best time of day

Mornings are the most reliable time of day to fly this route — 86% on time.

  • Mornings86% on time · p90 20 min · 726 flights
  • Middays82% on time · p90 45 min · 1,339 flights
  • Afternoons79% on time · p90 45 min · 823 flights
  • Evenings73% on time · p90 60 min · 984 flights
  • Overnights69% on time · p90 80 min · 200 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 75% to 82% on time.

  • Wednesdays82% on time · p90 30 min · 568 flights
  • Saturdays82% on time · p90 50 min · 568 flights
  • Tuesdays81% on time · p90 40 min · 556 flights
  • Mondays80% on time · p90 40 min · 590 flights
  • Sundays79% on time · p90 55 min · 610 flights
  • Fridays77% on time · p90 50 min · 585 flights
  • Thursdays75% on time · p90 50 min · 599 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.