| South Portland to Cutrofiano | 4,329.71 mi (6,968.00 km) |
| South Portland to Dalmine | 3,758.13 mi (6,048.12 km) |
| South Portland to Deruta | 3,971.16 mi (6,390.96 km) |
| South Portland to Desenzano del Garda | 3,803.74 mi (6,121.53 km) |
| South Portland to Desio | 3,742.99 mi (6,023.76 km) |
| South Portland to Dolianova | 3,960.05 mi (6,373.09 km) |
| South Portland to Dolo | 3,870.02 mi (6,228.20 km) |
| South Portland to Domodossola | 3,687.43 mi (5,934.35 km) |
| South Portland to Dorgali | 3,944.37 mi (6,347.85 km) |
| South Portland to Dueville | 3,840.87 mi (6,181.29 km) |
| South Portland to Eboli | 4,173.99 mi (6,717.39 km) |
| South Portland to Elmas | 3,958.33 mi (6,370.32 km) |
| South Portland to Empoli | 3,881.89 mi (6,247.30 km) |
| South Portland to Enna | 4,258.99 mi (6,854.17 km) |
| South Portland to Eraclea | 3,890.04 mi (6,260.41 km) |
