Distance from Ajax, South Dakota to Porcupine, North Dakota
The driving distance from Ajax, South Dakota to Porcupine, North Dakota is 307.6 mi (495.1 km)
The straight-line (air) distance is approximately 118.1 mi (190 km)
Estimated travel time by road is 4 hours 45 minutes
This route includes Toll roads along the way.
We found 2 routes between Ajax and Porcupine.
Available Routes
Route Directions
Take I-90 E, US-14 E and SD-63 N to SD-65 N in Dupree
Follow SD-65 N and ND-31 N to 82nd St SW in East Grant
Continue on 82nd St SW. Drive to Wiyohepeyata St W in Porcupine
Route Directions
Follow SD-79 N, US-16 BYP and I-90 E to 161st Ave/Adams Ave in East Central Pennington. Exit from I-90 E
Follow New Underwood Rd to SD-34 E in Belle Fourche-Cheyenne Valleys
Continue on SD-34 E to Dupree
Follow SD-65 N and ND-31 N to 82nd St SW in East Grant
Continue on 82nd St SW. Drive to Wiyohepeyata St W in Porcupine
Journey Details
Traveling from Ajax, South Dakota to Porcupine, North Dakota covers 257.9 miles (415 km) in a northeast direction. This fast highway, long-distance route typically takes 4 hours 7 minutes under normal conditions.
Drivers have 2 route options between these locations (258-308 miles / 415-495 km). The primary route shown here saves 38 minutes compared to alternatives.
The route features scenic views, toll sections. During midday weekend travel, expect typical weekend traffic patterns with average speeds around 66 mph (106 km/h) .
Journey Waypoints
Ajax
Starting Point
Porcupine
Destination