| Porsgrunn to Marysville (California) | 5,098.36 mi (8,205.02 km) |
| Porsgrunn to Marysville (Ohio) | 3,991.76 mi (6,424.11 km) |
| Porsgrunn to Marysville (Washington) | 4,547.26 mi (7,318.11 km) |
| Porsgrunn to Maryville (Missouri) | 4,339.14 mi (6,983.18 km) |
| Porsgrunn to Maryville (Tennessee) | 4,260.92 mi (6,857.29 km) |
| Porsgrunn to Mason (Ohio) | 4,069.93 mi (6,549.92 km) |
| Porsgrunn to Mason City (Iowa) | 4,130.72 mi (6,647.74 km) |
| Porsgrunn to Massapequa (New York) | 3,643.66 mi (5,863.91 km) |
| Porsgrunn to Massapequa Park (New York) | 3,642.21 mi (5,861.57 km) |
| Porsgrunn to Massillon (Ohio) | 3,902.50 mi (6,280.46 km) |
| Porsgrunn to Mastic (New York) | 3,615.22 mi (5,818.13 km) |
| Porsgrunn to Mastic Beach (New York) | 3,617.13 mi (5,821.21 km) |
| Porsgrunn to Matteson (Illinois) | 4,058.71 mi (6,531.87 km) |
| Porsgrunn to Matthews (North Carolina) | 4,188.29 mi (6,740.39 km) |
| Porsgrunn to Mattoon (Illinois) | 4,191.22 mi (6,745.11 km) |
