SFO → SEA: cancellations & delays
Over Jan 2023 - Apr 2026, 1.2% of San Francisco International Airport (SFO) to Seattle–Tacoma International Airport (SEA) flights were cancelled and 22.2% arrived at least 15 minutes late, across 22,159 flights, flown by AS, UA, OO, DL, WN. Cancellations peak in January.
Check today's live SFO departures →Airport pages: San Francisco International Airport (SFO) · 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.