| Hertford to Deville-les-Rouen | 168.18 mi (270.67 km) |
| Hertford to Dieppe | 139.14 mi (223.92 km) |
| Hertford to Digne-les-Bains | 606.68 mi (976.36 km) |
| Hertford to Dijon | 384.43 mi (618.67 km) |
| Hertford to Dinan | 246.81 mi (397.19 km) |
| Hertford to Dinard | 235.54 mi (379.07 km) |
| Hertford to Divonne-les-Bains | 469.24 mi (755.17 km) |
| Hertford to Dole | 409.84 mi (659.58 km) |
| Hertford to Dombasle-sur-Meurthe | 358.64 mi (577.18 km) |
| Hertford to Domerat | 393.70 mi (633.61 km) |
| Hertford to Domont | 218.63 mi (351.85 km) |
| Hertford to Douai | 168.73 mi (271.54 km) |
| Hertford to Douarnenez | 318.11 mi (511.95 km) |
| Hertford to Douchy-les-Mines | 182.72 mi (294.06 km) |
| Hertford to Dourdan | 243.94 mi (392.58 km) |
