| Longmont to Dendermonde | 4,830.36 mi (7,773.71 km) |
| Longmont to Dessel | 4,855.19 mi (7,813.67 km) |
| Longmont to Destelbergen | 4,819.59 mi (7,756.39 km) |
| Longmont to Deurne | 4,833.94 mi (7,779.48 km) |
| Longmont to Diepenbeek | 4,879.75 mi (7,853.21 km) |
| Longmont to Diest | 4,864.16 mi (7,828.11 km) |
| Longmont to Diksmuide | 4,788.95 mi (7,707.07 km) |
| Longmont to Dilbeek | 4,844.23 mi (7,796.04 km) |
| Longmont to Dinant | 4,891.86 mi (7,872.69 km) |
| Longmont to Dison | 4,907.18 mi (7,897.34 km) |
| Longmont to Dour | 4,847.71 mi (7,801.64 km) |
| Longmont to Drongen | 4,815.13 mi (7,749.20 km) |
| Longmont to Duffel | 4,841.28 mi (7,791.29 km) |
| Longmont to Durbuy | 4,906.07 mi (7,895.56 km) |
| Longmont to Ecaussinnes-Lalaing | 4,853.82 mi (7,811.47 km) |
