| Welwyn Garden City to Curtea de Arges | 1,221.37 mi (1,965.61 km) |
| Welwyn Garden City to Dabuleni | 1,247.41 mi (2,007.51 km) |
| Welwyn Garden City to Darabani | 1,208.28 mi (1,944.55 km) |
| Welwyn Garden City to Darmanesti | 1,255.87 mi (2,021.12 km) |
| Welwyn Garden City to Dej | 1,120.40 mi (1,803.12 km) |
| Welwyn Garden City to Deva | 1,121.84 mi (1,805.42 km) |
| Welwyn Garden City to Dolhasca | 1,229.64 mi (1,978.92 km) |
| Welwyn Garden City to Dorohoi | 1,206.15 mi (1,941.10 km) |
| Welwyn Garden City to Draganesti-Olt | 1,251.06 mi (2,013.39 km) |
| Welwyn Garden City to Dragasani | 1,221.38 mi (1,965.62 km) |
| Welwyn Garden City to Drobeta-Turnu Severin | 1,156.04 mi (1,860.46 km) |
| Welwyn Garden City to Fagaras | 1,209.32 mi (1,946.22 km) |
| Welwyn Garden City to Falticeni | 1,215.62 mi (1,956.35 km) |
| Welwyn Garden City to Fetesti | 1,379.09 mi (2,219.43 km) |
| Welwyn Garden City to Filiasi | 1,200.66 mi (1,932.28 km) |
