| Letchworth to Dendermonde | 197.29 mi (317.50 km) |
| Letchworth to Dessel | 235.08 mi (378.32 km) |
| Letchworth to Destelbergen | 184.73 mi (297.30 km) |
| Letchworth to Deurne | 207.96 mi (334.68 km) |
| Letchworth to Diepenbeek | 254.14 mi (409.00 km) |
| Letchworth to Diest | 237.33 mi (381.94 km) |
| Letchworth to Diksmuide | 148.30 mi (238.66 km) |
| Letchworth to Dilbeek | 208.62 mi (335.74 km) |
| Letchworth to Dinant | 252.50 mi (406.36 km) |
| Letchworth to Dison | 278.90 mi (448.85 km) |
| Letchworth to Dour | 205.10 mi (330.08 km) |
| Letchworth to Drongen | 179.37 mi (288.67 km) |
| Letchworth to Duffel | 212.77 mi (342.42 km) |
| Letchworth to Durbuy | 270.67 mi (435.60 km) |
| Letchworth to Ecaussinnes-Lalaing | 214.20 mi (344.72 km) |
