| South Portland to Dobrova | 3,945.28 mi (6,349.32 km) |
| South Portland to Dobrovnik | 4,002.77 mi (6,441.84 km) |
| South Portland to Dobrovo | 3,910.69 mi (6,293.65 km) |
| South Portland to Dol | 3,953.42 mi (6,362.41 km) |
| South Portland to Dolenjske Toplice | 3,982.46 mi (6,409.14 km) |
| South Portland to Domzale | 3,949.66 mi (6,356.36 km) |
| South Portland to Dornava | 3,994.58 mi (6,428.66 km) |
| South Portland to Dragomer | 3,945.17 mi (6,349.14 km) |
| South Portland to Dravograd | 3,951.20 mi (6,358.84 km) |
| South Portland to Gorenja Vas | 3,932.30 mi (6,328.42 km) |
| South Portland to Gorisnica | 3,997.83 mi (6,433.89 km) |
| South Portland to Gornja Radgona | 3,987.54 mi (6,417.33 km) |
| South Portland to Gornji Grad | 3,952.71 mi (6,361.28 km) |
| South Portland to Gornji Petrovci | 3,991.96 mi (6,424.44 km) |
| South Portland to Grad | 3,987.42 mi (6,417.14 km) |
