| Portalegre to Dendermonde | 982.36 mi (1,580.96 km) |
| Portalegre to Dessel | 1,021.31 mi (1,643.64 km) |
| Portalegre to Destelbergen | 975.15 mi (1,569.35 km) |
| Portalegre to Deurne | 1,002.55 mi (1,613.44 km) |
| Portalegre to Diepenbeek | 1,013.28 mi (1,630.72 km) |
| Portalegre to Diest | 1,006.55 mi (1,619.89 km) |
| Portalegre to Diksmuide | 949.92 mi (1,528.75 km) |
| Portalegre to Dilbeek | 975.84 mi (1,570.46 km) |
| Portalegre to Dinant | 965.92 mi (1,554.50 km) |
| Portalegre to Dison | 1,011.82 mi (1,628.37 km) |
| Portalegre to Dour | 939.55 mi (1,512.07 km) |
| Portalegre to Drongen | 971.59 mi (1,563.62 km) |
| Portalegre to Duffel | 997.42 mi (1,605.19 km) |
| Portalegre to Durbuy | 986.66 mi (1,587.87 km) |
| Portalegre to Ecaussinnes-Lalaing | 959.87 mi (1,544.76 km) |
