Historical on-time performance
Denver to Boise
Flights on DEN–BOI arrive on time 76% of the time over the last 12 months.
based on 2,918 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- United AirlinesOn-time80%Medianon timep9035 minCancel0.3%Flights955
- SkyWest AirlinesOn-time78%Medianon timep9045 minCancel0.1%Flights865
- Southwest AirlinesOn-time71%Medianon timep9040 minCancel0.2%Flights1,098
Why flights run late
Delay causes
- Airline31%
- Weather3%
- Air traffic (NAS)14%
- Late aircraft51%
- Security0%
Most delay minutes here are attributed to Late aircraft.
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 DEN → BOI
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 — 88% on time.
- Mornings88% on time · p90 15 min · 2,278 flights
- Middays81% on time · p90 25 min · 1,442 flights
- Afternoons74% on time · p90 40 min · 1,813 flights
- Evenings70% on time · p90 60 min · 1,395 flights
- Overnights62% on time · p90 75 min · 1,601 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 80% on time.
- Wednesdays80% on time · p90 35 min · 1,203 flights
- Tuesdays79% on time · p90 40 min · 1,206 flights
- Sundays76% on time · p90 40 min · 1,289 flights
- Mondays75% on time · p90 40 min · 1,213 flights
- Saturdays74% on time · p90 45 min · 1,147 flights
- Fridays74% on time · p90 45 min · 1,225 flights
- Thursdays73% on time · p90 45 min · 1,246 flights
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