MSO → SEA: cancellations & delays
Over Jan 2023 - Apr 2026, 1.0% of Missoula Montana Airport (MSO) to Seattle–Tacoma International Airport (SEA) flights were cancelled and 24.0% arrived at least 15 minutes late, across 970 flights, flown by AS, OO. Cancellations peak in February.
Check today's live MSO departures →Airport pages: Missoula Montana Airport (MSO) · 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.