| Oswego to Mangualde | 4,027.30 mi (6,481.31 km) |
| Oswego to Marco de Canavezes | 3,989.81 mi (6,420.97 km) |
| Oswego to Marinha Grande | 4,003.20 mi (6,442.53 km) |
| Oswego to Massama | 4,021.90 mi (6,472.63 km) |
| Oswego to Matosinhos | 3,964.89 mi (6,380.88 km) |
| Oswego to Mealhada | 4,003.54 mi (6,443.07 km) |
| Oswego to Melgaco | 3,953.05 mi (6,361.82 km) |
| Oswego to Melres | 3,982.45 mi (6,409.13 km) |
| Oswego to Mira | 3,988.88 mi (6,419.49 km) |
| Oswego to Miranda do Corvo | 4,018.64 mi (6,467.37 km) |
| Oswego to Mirandela | 4,023.15 mi (6,474.63 km) |
| Oswego to Mogadouro | 4,049.27 mi (6,516.67 km) |
| Oswego to Moimenta da Beira | 4,021.04 mi (6,471.24 km) |
| Oswego to Moita | 4,039.19 mi (6,500.45 km) |
| Oswego to Moncao | 3,944.93 mi (6,348.75 km) |
