OnTimeStats

Historical on-time performance

Denver to Spokane

836 miData through Dec 2025Source: US DOT · BTS

Flights on DEN–GEG arrive on time 71% of the time over the last 12 months.

On-time rate71%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights

based on 1,821 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlinesbest
    On-time87%
    Medianon time
    p9025 min
    Cancel0.0%
    Flights122
  • United Airlines
    On-time71%
    Medianon time
    p9050 min
    Cancel0.5%
    Flights842
  • Southwest Airlines
    On-time69%
    Medianon time
    p9050 min
    Cancel0.2%
    Flights857

Why flights run late

Delay causes

  • Airline36%
  • Weather1%
  • Air traffic (NAS)12%
  • Late aircraft51%
  • 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 → GEG

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

Best time of day

Mornings are the most reliable time of day to fly this route — 85% on time.

  • Mornings85% on time · p90 20 min · 1,195 flights
  • Middays82% on time · p90 25 min · 1,768 flights
  • Evenings69% on time · p90 60 min · 1,187 flights
  • Afternoons67% on time · p90 50 min · 663 flights
  • Overnights55% on time · p90 70 min · 987 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 71% to 77% on time.

  • Tuesdays77% on time · p90 35 min · 818 flights
  • Mondays74% on time · p90 45 min · 825 flights
  • Wednesdays74% on time · p90 45 min · 805 flights
  • Sundays74% on time · p90 45 min · 868 flights
  • Saturdays73% on time · p90 45 min · 829 flights
  • Thursdays71% on time · p90 50 min · 834 flights
  • Fridays71% on time · p90 50 min · 823 flights
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Keep exploring

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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.