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Distance from Johntown to Markham
Route Information
The driving distance from Johntown, Texas to Markham, Oklahoma is 244.8 mi (394 km)
The straight-line (air) distance is 199.4 mi (320.9 km)
The estimated flight time is 0 hr 24 min
The estimated travel time by road is 4 hours 12 minutes
Traveling highway, long-distance in a northwest direction. Average speeds around 62 mph.
Location Details
Origin:
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Destination:
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Journey Summary
Traveling from Johntown, Texas to Markham, Oklahoma covers 244.8 mi (394 km) in a northwest direction. This highway, long-distance route typically takes 4 hours 12 minutes under normal conditions.
Drivers have 3 route options between these locations (239.6-246.1 miles / 386-396 km). The primary route shown here saves 31 minutes compared to alternatives.
The route features scenic views along the way. with average speeds around 62 mph (100 km/h).
Available Routes
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.