| Didcot to Montalegre | 743.04 mi (1,195.80 km) |
| Didcot to Montemor-o-Novo | 956.51 mi (1,539.35 km) |
| Didcot to Montemor-o-Velho | 866.57 mi (1,394.60 km) |
| Didcot to Montijo | 966.46 mi (1,555.36 km) |
| Didcot to Mortagua | 840.77 mi (1,353.08 km) |
| Didcot to Moura | 978.38 mi (1,574.55 km) |
| Didcot to Murtosa | 829.32 mi (1,334.66 km) |
| Didcot to Nazare | 910.47 mi (1,465.25 km) |
| Didcot to Nelas | 828.29 mi (1,333.01 km) |
| Didcot to Obidos | 927.79 mi (1,493.14 km) |
| Didcot to Odemira | 1,033.59 mi (1,663.41 km) |
| Didcot to Odivelas | 964.79 mi (1,552.68 km) |
| Didcot to Oeiras | 974.33 mi (1,568.03 km) |
| Didcot to Olhao | 1,057.82 mi (1,702.40 km) |
| Didcot to Oliveira de Azemeis | 819.34 mi (1,318.60 km) |
