Historical on-time performance
Buffalo to Denver
Flights on BUF–DEN arrive on time 85% of the time over the last 12 months.
based on 453 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 AirlinesOn-time86%Medianon timep9020 minCancel0.4%Flights275
- Southwest AirlinesOn-time83%Medianon timep9025 minCancel0.0%Flights178
Why flights run late
Delay causes
- Airline49%
- Weather3%
- Air traffic (NAS)23%
- Late aircraft25%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline100%
- Weather0%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 1 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 BUF → 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 59% to 86% on time.
- Mornings86% on time · p90 20 min · 610 flights
- Middays84% on time · p90 20 min · 423 flights
- Afternoons60% on time · p90 50 min · 226 flights
- Evenings59% on time · p90 100 min · 138 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 67% to 85% on time.
- Thursdays85% on time · p90 20 min · 183 flights · limited
- Tuesdays83% on time · p90 20 min · 165 flights · limited
- Wednesdays83% on time · p90 25 min · 178 flights · limited
- Sundays79% on time · p90 30 min · 208 flights
- Mondays77% on time · p90 45 min · 222 flights
- Fridays77% on time · p90 35 min · 227 flights
- Saturdays67% on time · p90 50 min · 249 flights
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