| Porsgrunn to Morristown (New Jersey) | 3,670.50 mi (5,907.10 km) |
| Porsgrunn to Morristown (Tennessee) | 4,213.10 mi (6,780.32 km) |
| Porsgrunn to Morrisville (North Carolina) | 4,085.78 mi (6,575.43 km) |
| Porsgrunn to Morro Bay (California) | 5,321.66 mi (8,564.39 km) |
| Porsgrunn to Morton (Illinois) | 4,161.55 mi (6,697.37 km) |
| Porsgrunn to Morton Grove (Illinois) | 4,030.47 mi (6,486.42 km) |
| Porsgrunn to Moscow (Idaho) | 4,526.08 mi (7,284.01 km) |
| Porsgrunn to Moses Lake (Washington) | 4,549.30 mi (7,321.39 km) |
| Porsgrunn to Moss Bluff (Louisiana) | 4,870.32 mi (7,838.03 km) |
| Porsgrunn to Moss Point (Mississippi) | 4,713.04 mi (7,584.90 km) |
| Porsgrunn to Moultrie (Georgia) | 4,513.91 mi (7,264.44 km) |
| Porsgrunn to Mounds View (Minnesota) | 4,021.08 mi (6,471.31 km) |
| Porsgrunn to Mount Airy (North Carolina) | 4,107.85 mi (6,610.94 km) |
| Porsgrunn to Mount Clemens (Michigan) | 3,847.26 mi (6,191.57 km) |
| Porsgrunn to Mount Dora (Florida) | 4,576.00 mi (7,364.36 km) |
