| South Portland to Montijo | 3,240.96 mi (5,215.82 km) |
| South Portland to Montilla | 3,379.13 mi (5,438.18 km) |
| South Portland to Montmelo | 3,569.87 mi (5,745.16 km) |
| South Portland to Montornes del Valles | 3,570.98 mi (5,746.94 km) |
| South Portland to Montoro | 3,376.65 mi (5,434.19 km) |
| South Portland to Monzon | 3,464.47 mi (5,575.53 km) |
| South Portland to Mora | 3,351.09 mi (5,393.05 km) |
| South Portland to Moralzarzal | 3,310.80 mi (5,328.21 km) |
| South Portland to Moron de la Frontera | 3,355.28 mi (5,399.80 km) |
| South Portland to Mostoles | 3,326.28 mi (5,353.14 km) |
| South Portland to Motril | 3,460.96 mi (5,569.87 km) |
| South Portland to Muchamiel | 3,550.03 mi (5,713.23 km) |
| South Portland to Mula | 3,513.36 mi (5,654.20 km) |
| South Portland to Munguia | 3,281.92 mi (5,281.74 km) |
| South Portland to Murcia | 3,532.32 mi (5,684.72 km) |
