| Letterkenny to Deville-les-Rouen | 529.88 mi (852.76 km) |
| Letterkenny to Dieppe | 507.73 mi (817.11 km) |
| Letterkenny to Digne-les-Bains | 973.70 mi (1,567.02 km) |
| Letterkenny to Dijon | 761.75 mi (1,225.92 km) |
| Letterkenny to Dinan | 510.20 mi (821.08 km) |
| Letterkenny to Dinard | 499.02 mi (803.10 km) |
| Letterkenny to Divonne-les-Bains | 846.73 mi (1,362.68 km) |
| Letterkenny to Dole | 788.06 mi (1,268.26 km) |
| Letterkenny to Dombasle-sur-Meurthe | 741.40 mi (1,193.17 km) |
| Letterkenny to Domerat | 743.06 mi (1,195.83 km) |
| Letterkenny to Domont | 591.00 mi (951.13 km) |
| Letterkenny to Douai | 551.49 mi (887.53 km) |
| Letterkenny to Douarnenez | 496.02 mi (798.26 km) |
| Letterkenny to Douchy-les-Mines | 565.26 mi (909.70 km) |
| Letterkenny to Dourdan | 607.65 mi (977.92 km) |
