| Opelousas to Mangualde | 4,609.62 mi (7,418.47 km) |
| Opelousas to Marco de Canavezes | 4,576.41 mi (7,365.01 km) |
| Opelousas to Marinha Grande | 4,572.91 mi (7,359.38 km) |
| Opelousas to Massama | 4,580.33 mi (7,371.33 km) |
| Opelousas to Matosinhos | 4,549.61 mi (7,321.89 km) |
| Opelousas to Mealhada | 4,581.27 mi (7,372.83 km) |
| Opelousas to Melgaco | 4,548.29 mi (7,319.76 km) |
| Opelousas to Melres | 4,567.06 mi (7,349.97 km) |
| Opelousas to Mira | 4,566.10 mi (7,348.43 km) |
| Opelousas to Miranda do Corvo | 4,593.99 mi (7,393.32 km) |
| Opelousas to Mirandela | 4,615.94 mi (7,428.64 km) |
| Opelousas to Mogadouro | 4,642.21 mi (7,470.91 km) |
| Opelousas to Moimenta da Beira | 4,607.52 mi (7,415.08 km) |
| Opelousas to Moita | 4,597.65 mi (7,399.21 km) |
| Opelousas to Moncao | 4,539.05 mi (7,304.89 km) |
