SEA → BOS: cancellations & delays
Over Jan 2023 - Apr 2026, 0.8% of Seattle–Tacoma International Airport (SEA) to Boston Logan International Airport (BOS) flights were cancelled and 26.2% arrived at least 15 minutes late, across 8,298 flights, flown by AS, DL, B6. Cancellations peak in February.
Check today's live SEA departures →Airport pages: Seattle–Tacoma International Airport (SEA) · Boston Logan International Airport (BOS)
Rates are historical averages from U.S. DOT (BTS) on-time records; a specific flight's live estimate can differ with weather and the day's disruptions.