| Opalenica to Montilla | 1,437.04 mi (2,312.69 km) |
| Opalenica to Montmelo | 995.76 mi (1,602.53 km) |
| Opalenica to Montornes del Valles | 995.81 mi (1,602.59 km) |
| Opalenica to Montoro | 1,405.10 mi (2,261.29 km) |
| Opalenica to Monzon | 1,043.51 mi (1,679.37 km) |
| Opalenica to Mora | 1,295.73 mi (2,085.27 km) |
| Opalenica to Moralzarzal | 1,251.75 mi (2,014.49 km) |
| Opalenica to Moron de la Frontera | 1,489.89 mi (2,397.74 km) |
| Opalenica to Mostoles | 1,265.40 mi (2,036.46 km) |
| Opalenica to Motril | 1,446.11 mi (2,327.28 km) |
| Opalenica to Muchamiel | 1,255.24 mi (2,020.11 km) |
| Opalenica to Mula | 1,308.82 mi (2,106.35 km) |
| Opalenica to Munguia | 1,081.25 mi (1,740.10 km) |
| Opalenica to Murcia | 1,300.70 mi (2,093.27 km) |
| Opalenica to Muro del Alcoy | 1,234.22 mi (1,986.28 km) |
