Nonstop from Seattle-Tacoma International to Helena Regional Airport: distance, flying time, which airlines fly it and how often.
Distance
490 mi, great circle
Flying time
typical, gate to gate
Flights a day
average, November 2026
Airlines
passenger airlines
The shortest path over the Earth's surface. Actual tracks vary with winds and airspace. Map © OpenStreetMap contributors.
Fares found in recent searches load here. You can also compare SEA to HLN fares by month.
Alaska cruise flights compared: SEA, YVR or ANC, why Anchorage cruises really leave from Whittier or Seward, and how the PVSA rule shapes routes.
The closest airport to Seattle cruise terminals is SEA, about 15 miles from Pier 91 and 14 from Pier 66. Compare transfers, costs and timing.
About 1h 42m gate to gate for the 788 km (490 mile) trip, estimated from distance. Schedules vary by airline and season, and winds can add or save time.
Alaska Airlines, with about 1.1 flights a day between them in our data (AeroDataBox, November 2026).