STS → SEA: cancellations & delays
Over Jan 2023 - Apr 2026, 1.0% of Charles M. Schulz Sonoma County Airport (STS) to Seattle–Tacoma International Airport (SEA) flights were cancelled and 25.6% arrived at least 15 minutes late, across 1,536 flights, flown by AS, OO. Cancellations peak in December.
Check today's live STS departures →Airport pages: Charles M. Schulz Sonoma County Airport (STS) · 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.