| Covington to Mangualde | 3,936.66 mi (6,335.44 km) |
| Covington to Marco de Canavezes | 3,901.17 mi (6,278.33 km) |
| Covington to Marinha Grande | 3,906.35 mi (6,286.67 km) |
| Covington to Massama | 3,919.81 mi (6,308.32 km) |
| Covington to Matosinhos | 3,875.24 mi (6,236.60 km) |
| Covington to Mealhada | 3,910.57 mi (6,293.45 km) |
| Covington to Melgaco | 3,868.67 mi (6,226.03 km) |
| Covington to Melres | 3,892.80 mi (6,264.86 km) |
| Covington to Mira | 3,895.62 mi (6,269.39 km) |
| Covington to Miranda do Corvo | 3,924.56 mi (6,315.97 km) |
| Covington to Mirandela | 3,937.73 mi (6,337.17 km) |
| Covington to Mogadouro | 3,964.00 mi (6,379.45 km) |
| Covington to Moimenta da Beira | 3,932.44 mi (6,328.65 km) |
| Covington to Moita | 3,937.17 mi (6,336.26 km) |
| Covington to Moncao | 3,859.96 mi (6,212.00 km) |
