| Douai to Montemor-o-Novo | 980.30 mi (1,577.64 km) |
| Douai to Montemor-o-Velho | 905.66 mi (1,457.53 km) |
| Douai to Montijo | 997.52 mi (1,605.35 km) |
| Douai to Mortagua | 877.00 mi (1,411.39 km) |
| Douai to Moura | 991.06 mi (1,594.96 km) |
| Douai to Murtosa | 872.32 mi (1,403.87 km) |
| Douai to Nazare | 949.43 mi (1,527.96 km) |
| Douai to Nelas | 860.86 mi (1,385.42 km) |
| Douai to Obidos | 965.98 mi (1,554.60 km) |
| Douai to Odemira | 1,055.44 mi (1,698.57 km) |
| Douai to Odivelas | 999.37 mi (1,608.33 km) |
| Douai to Oeiras | 1,009.59 mi (1,624.77 km) |
| Douai to Olhao | 1,068.81 mi (1,720.09 km) |
| Douai to Oliveira de Azemeis | 861.48 mi (1,386.41 km) |
| Douai to Oliveira de Frades | 859.46 mi (1,383.16 km) |
