| Porsgrunn to Monticello (Minnesota) | 4,027.29 mi (6,481.29 km) |
| Porsgrunn to Montrose (Colorado) | 4,811.82 mi (7,743.88 km) |
| Porsgrunn to Moody (Alabama) | 4,464.53 mi (7,184.97 km) |
| Porsgrunn to Moore (Oklahoma) | 4,707.16 mi (7,575.43 km) |
| Porsgrunn to Moorestown-Lenola (New Jersey) | 3,731.13 mi (6,004.67 km) |
| Porsgrunn to Mooresville (North Carolina) | 4,166.21 mi (6,704.86 km) |
| Porsgrunn to Moorhead (Minnesota) | 4,021.59 mi (6,472.12 km) |
| Porsgrunn to Moorpark (California) | 5,344.63 mi (8,601.35 km) |
| Porsgrunn to Moraga (California) | 5,192.86 mi (8,357.10 km) |
| Porsgrunn to Moreno Valley (California) | 5,327.54 mi (8,573.85 km) |
| Porsgrunn to Morgan City (Louisiana) | 4,841.11 mi (7,791.01 km) |
| Porsgrunn to Morgan Hill (California) | 5,227.53 mi (8,412.89 km) |
| Porsgrunn to Morganton (North Carolina) | 4,186.43 mi (6,737.41 km) |
| Porsgrunn to Morgantown (West Virginia) | 3,913.66 mi (6,298.42 km) |
| Porsgrunn to Morris (Illinois) | 4,087.22 mi (6,577.74 km) |
