| Upper Arlington to Montalegre | 3,798.65 mi (6,113.34 km) |
| Upper Arlington to Montemor-o-Novo | 3,875.20 mi (6,236.53 km) |
| Upper Arlington to Montemor-o-Velho | 3,806.16 mi (6,125.42 km) |
| Upper Arlington to Montijo | 3,841.28 mi (6,181.95 km) |
| Upper Arlington to Mortagua | 3,819.43 mi (6,146.78 km) |
| Upper Arlington to Moura | 3,928.47 mi (6,322.27 km) |
| Upper Arlington to Murtosa | 3,791.51 mi (6,101.85 km) |
| Upper Arlington to Nazare | 3,805.08 mi (6,123.68 km) |
| Upper Arlington to Nelas | 3,835.01 mi (6,171.85 km) |
| Upper Arlington to Obidos | 3,808.09 mi (6,128.53 km) |
| Upper Arlington to Odemira | 3,888.85 mi (6,258.51 km) |
| Upper Arlington to Odivelas | 3,824.49 mi (6,154.93 km) |
| Upper Arlington to Oeiras | 3,821.20 mi (6,149.63 km) |
| Upper Arlington to Olhao | 3,945.34 mi (6,349.41 km) |
| Upper Arlington to Oliveira de Azemeis | 3,795.80 mi (6,108.75 km) |
