| Porsgrunn to McKeesport (Pennsylvania) | 3,872.05 mi (6,231.46 km) |
| Porsgrunn to McKinleyville (California) | 5,036.52 mi (8,105.50 km) |
| Porsgrunn to McKinney (Texas) | 4,807.77 mi (7,737.36 km) |
| Porsgrunn to McLean (Virginia) | 3,860.64 mi (6,213.10 km) |
| Porsgrunn to McMinnville (Oregon) | 4,748.20 mi (7,641.50 km) |
| Porsgrunn to McMinnville (Tennessee) | 4,322.85 mi (6,956.95 km) |
| Porsgrunn to McNair (Virginia) | 3,867.45 mi (6,224.05 km) |
| Porsgrunn to McPherson (Kansas) | 4,534.76 mi (7,297.99 km) |
| Porsgrunn to Mead Valley (California) | 5,335.20 mi (8,586.17 km) |
| Porsgrunn to Meadow Woods (Florida) | 4,591.65 mi (7,389.55 km) |
| Porsgrunn to Meadowbrook (Virginia) | 3,952.47 mi (6,360.89 km) |
| Porsgrunn to Meadville (Pennsylvania) | 3,811.24 mi (6,133.59 km) |
| Porsgrunn to Mebane (North Carolina) | 4,086.69 mi (6,576.90 km) |
| Porsgrunn to Mechanicsville (Virginia) | 3,937.79 mi (6,337.27 km) |
| Porsgrunn to Medford (Massachusetts) | 3,472.10 mi (5,587.81 km) |
