| Longmont to Deville-les-Rouen | 4,793.80 mi (7,714.88 km) |
| Longmont to Dieppe | 4,775.59 mi (7,685.56 km) |
| Longmont to Digne-les-Bains | 5,221.59 mi (8,403.33 km) |
| Longmont to Dijon | 5,028.80 mi (8,093.07 km) |
| Longmont to Dinan | 4,725.06 mi (7,604.26 km) |
| Longmont to Dinard | 4,717.33 mi (7,591.81 km) |
| Longmont to Divonne-les-Bains | 5,112.67 mi (8,228.05 km) |
| Longmont to Dole | 5,055.70 mi (8,136.36 km) |
| Longmont to Dombasle-sur-Meurthe | 5,014.98 mi (8,070.83 km) |
| Longmont to Domerat | 4,982.91 mi (8,019.22 km) |
| Longmont to Domont | 4,857.83 mi (7,817.93 km) |
| Longmont to Douai | 4,825.08 mi (7,765.21 km) |
| Longmont to Douarnenez | 4,655.27 mi (7,491.94 km) |
| Longmont to Douchy-les-Mines | 4,838.82 mi (7,787.33 km) |
| Longmont to Dourdan | 4,868.48 mi (7,835.06 km) |
