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 AirlinesbestOn-time87%Medianon timep9025 minCancel0.0%Flights122
- United AirlinesOn-time71%Medianon timep9050 minCancel0.5%Flights842
- Southwest AirlinesOn-time69%Medianon timep9050 minCancel0.2%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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