| Port Huron to Curtea de Arges | 4,881.34 mi (7,855.75 km) |
| Port Huron to Dabuleni | 4,921.98 mi (7,921.16 km) |
| Port Huron to Darabani | 4,806.59 mi (7,735.47 km) |
| Port Huron to Darmanesti | 4,887.85 mi (7,866.23 km) |
| Port Huron to Dej | 4,760.58 mi (7,661.41 km) |
| Port Huron to Deva | 4,783.54 mi (7,698.37 km) |
| Port Huron to Dolhasca | 4,842.61 mi (7,793.43 km) |
| Port Huron to Dorohoi | 4,810.70 mi (7,742.07 km) |
| Port Huron to Draganesti-Olt | 4,920.96 mi (7,919.52 km) |
| Port Huron to Dragasani | 4,888.30 mi (7,866.96 km) |
| Port Huron to Drobeta-Turnu Severin | 4,830.42 mi (7,773.82 km) |
| Port Huron to Fagaras | 4,859.20 mi (7,820.13 km) |
| Port Huron to Falticeni | 4,830.59 mi (7,774.08 km) |
| Port Huron to Fetesti | 5,028.09 mi (8,091.93 km) |
| Port Huron to Filiasi | 4,873.21 mi (7,842.67 km) |
