HLN to SEA
Great-circle distance and true bearings between Helena Regional Airport and Seattle–Tacoma International Airport, plus the airlines and aircraft that fly the route.
Great-circle distance
425 nm
489 mi · 787 km
Initial bearing HLN→SEA
281° W
Initial bearing SEA→HLN
093° E
Airlines flying this route
Aircraft on this route
Dash 8 Q400
Historical route data from OpenFlights — may be out of date. Distances are great-circle; actual routings differ.