| Letterkenny to Dendermonde | 560.33 mi (901.77 km) |
| Letterkenny to Dessel | 590.30 mi (950.00 km) |
| Letterkenny to Destelbergen | 548.85 mi (883.29 km) |
| Letterkenny to Deurne | 566.43 mi (911.58 km) |
| Letterkenny to Diepenbeek | 613.22 mi (986.88 km) |
| Letterkenny to Diest | 596.89 mi (960.59 km) |
| Letterkenny to Diksmuide | 516.23 mi (830.79 km) |
| Letterkenny to Dilbeek | 573.47 mi (922.91 km) |
| Letterkenny to Dinant | 620.01 mi (997.81 km) |
| Letterkenny to Dison | 639.97 mi (1,029.93 km) |
| Letterkenny to Dour | 574.53 mi (924.62 km) |
| Letterkenny to Drongen | 544.06 mi (875.57 km) |
| Letterkenny to Duffel | 573.00 mi (922.16 km) |
| Letterkenny to Durbuy | 635.89 mi (1,023.37 km) |
| Letterkenny to Ecaussinnes-Lalaing | 581.71 mi (936.17 km) |
