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Distance from Smithfield to Threemile Crossing
Route Information
The driving distance from Smithfield, Utah to Threemile Crossing, Idaho is 222.5 mi (358.1 km)
The straight-line (air) distance is 158.5 mi (255.1 km)
The estimated flight time is 0 hr 19 min
The estimated travel time by road is 3 hours 46 minutes
Traveling highway, long-distance in a west direction. Average speeds around 60 mph.
Location Details
Origin:
Destination:
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Journey Summary
Traveling from Smithfield, Utah to Threemile Crossing, Idaho covers 222.5 mi (358.1 km) in a west direction. This highway, long-distance route typically takes 3 hours 46 minutes under normal conditions.
The route features scenic views along the way. with average speeds around 60 mph (97 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.