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Distance from Deception Pass Bridge to Mt St Helens
Route Information
The driving distance from Deception Pass Bridge, Washington to Mt St Helens, Washington is 282.5 mi (454.7 km)
The straight-line (air) distance is 154.5 mi (248.6 km)
The estimated flight time is 0 hr 19 min
The estimated travel time by road is 5 hours 13 minutes
Traveling mixed highways and local roads, long-distance in a south direction. Average speeds around 55 mph.
Location Details
Origin:
Destination:
Journey Summary
Traveling from Deception Pass Bridge, Washington to Mt St Helens, Washington covers 282.5 mi (454.7 km) in a south direction. This mixed highways and local roads, long-distance route typically takes 5 hours 13 minutes under normal conditions.
The route features scenic views along the way. with average speeds around 55 mph (89 km/h).
How is the distance calculated?
Driving distances are based on actual road data. We use advanced routing algorithms that consider traffic, tolls, highways, and local streets. For air distances (as the crow flies), we use the Vincenty formula. It's a precise method that accounts for the Earth's shape and provides accuracy up to 0.5 mm.
When multiple route options exist, we display both the shortest and fastest paths. Travel times are estimated based on typical speeds for each road type, though actual times may vary with traffic and weather conditions. All distances are shown in both miles and kilometers for convenience.