| Upminster to Montijo | 934.45 mi (1,503.85 km) |
| Upminster to Montilla | 994.31 mi (1,600.19 km) |
| Upminster to Montmelo | 697.43 mi (1,122.40 km) |
| Upminster to Montornes del Valles | 698.24 mi (1,123.71 km) |
| Upminster to Montoro | 962.16 mi (1,548.45 km) |
| Upminster to Monzon | 666.46 mi (1,072.56 km) |
| Upminster to Mora | 842.70 mi (1,356.19 km) |
| Upminster to Moralzarzal | 778.15 mi (1,252.30 km) |
| Upminster to Moron de la Frontera | 1,035.51 mi (1,666.49 km) |
| Upminster to Mostoles | 799.90 mi (1,287.31 km) |
| Upminster to Motril | 1,039.53 mi (1,672.96 km) |
| Upminster to Muchamiel | 908.66 mi (1,462.34 km) |
| Upminster to Mula | 937.54 mi (1,508.82 km) |
| Upminster to Munguia | 584.69 mi (940.97 km) |
| Upminster to Murcia | 939.97 mi (1,512.73 km) |
