Historical on-time performance
Washington to Buffalo
284 miData through Dec 2025Source: US DOT · BTS
Flights on IAD–BUF arrive on time 71% of the time over the last 12 months.
On-time rate71%arrived within 15 min
p90 delay80 min1 in 10 flights is worse (tail risk)
Cancelled4.2%of scheduled flights
based on 72 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysOn-time71%Medianon timep9080 minCancel4.2%Flights72
Why flights run late
Delay causes
- Airline25%
- Weather38%
- Air traffic (NAS)9%
- Late aircraft28%
- Security0%
Most delay minutes here are attributed to Weather.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly IAD → BUF
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 80% to 82% on time.
- Evenings82% on time · p90 50 min · 76 flights · limited
- Overnights80% on time · p90 40 min · 208 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 84% on time.
- Thursdays84% on time · p90 45 min · 50 flights · limited
- Wednesdays75% on time · p90 50 min · 61 flights · limited
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