Boston (BOS) Delays in 2026
78.5% on-time departures, 76.3% on-time arrivals in 2026
58,149Flights
78.5%Departures on-time
16 minAvg dep. delay
76.3%Arrivals on-time
17.5 minAvg arr. delay
3.5%Cancelled
Delay causes
- Air carrier29.6%
- Extreme weather3.6%
- National Aviation System29.5%
- Security0.1%
- Late-arriving aircraft37.2%
← 2025 · Boston (BOS) overview
On-time = arrival within 15 minutes of schedule, per U.S. DOT definitions. Source: Bureau of Transportation Statistics (public domain). Delay-cause attribution is reported by carriers since June 2003.