SEA → HLN: cancellations & delays
Over Jan 2023 - Apr 2026, 0.0% of Seattle–Tacoma International Airport (SEA) to Helena Regional Airport (HLN) flights were cancelled and 15.3% arrived at least 15 minutes late, across 320 flights, flown by OO. Cancellations peak in April.
Check today's live SEA departures →Airport pages: Seattle–Tacoma International Airport (SEA) · Helena Regional Airport (HLN)
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.