| Ashtabula to Mangualde | 3,673.91 mi (5,912.59 km) |
| Ashtabula to Marco de Canavezes | 3,637.70 mi (5,854.31 km) |
| Ashtabula to Marinha Grande | 3,645.89 mi (5,867.49 km) |
| Ashtabula to Massama | 3,661.45 mi (5,892.53 km) |
| Ashtabula to Matosinhos | 3,612.11 mi (5,813.12 km) |
| Ashtabula to Mealhada | 3,648.65 mi (5,871.93 km) |
| Ashtabula to Melgaco | 3,603.74 mi (5,799.67 km) |
| Ashtabula to Melres | 3,629.67 mi (5,841.40 km) |
| Ashtabula to Mira | 3,633.80 mi (5,848.03 km) |
| Ashtabula to Miranda do Corvo | 3,663.06 mi (5,895.12 km) |
| Ashtabula to Mirandela | 3,673.19 mi (5,911.43 km) |
| Ashtabula to Mogadouro | 3,699.43 mi (5,953.66 km) |
| Ashtabula to Moimenta da Beira | 3,668.98 mi (5,904.65 km) |
| Ashtabula to Moita | 3,678.79 mi (5,920.44 km) |
| Ashtabula to Moncao | 3,595.22 mi (5,785.94 km) |
