PHL → SEA: cancellations & delays
Over Jan 2023 - Apr 2026, 1.6% of Philadelphia International Airport (PHL) to Seattle–Tacoma International Airport (SEA) flights were cancelled and 28.3% arrived at least 15 minutes late, across 3,576 flights, flown by AS, AA. Cancellations peak in January.
Check today's live PHL departures →Airport pages: Philadelphia International Airport (PHL) · Seattle–Tacoma International Airport (SEA)
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.