| South Portland to Dillenburg | 3,545.84 mi (5,706.48 km) |
| South Portland to Dillingen | 3,699.26 mi (5,953.39 km) |
| South Portland to Dillingen | 3,523.37 mi (5,670.31 km) |
| South Portland to Dingolfing | 3,779.25 mi (6,082.12 km) |
| South Portland to Dinkelsbuhl | 3,677.41 mi (5,918.22 km) |
| South Portland to Dinklage | 3,485.85 mi (5,609.93 km) |
| South Portland to Dinslaken | 3,461.09 mi (5,570.09 km) |
| South Portland to Dippoldiswalde | 3,751.97 mi (6,038.21 km) |
| South Portland to Ditzingen | 3,634.21 mi (5,848.69 km) |
| South Portland to Dobeln | 3,723.40 mi (5,992.24 km) |
| South Portland to Doberlug-Kirchhain | 3,725.18 mi (5,995.10 km) |
| South Portland to Donaueschingen | 3,638.09 mi (5,854.94 km) |
| South Portland to Donauworth | 3,708.54 mi (5,968.32 km) |
| South Portland to Donzdorf | 3,669.17 mi (5,904.96 km) |
| South Portland to Dorfen | 3,777.19 mi (6,078.79 km) |
