| Upminster to Marasesti | 1,282.34 mi (2,063.73 km) |
| Upminster to Marghita | 1,029.02 mi (1,656.04 km) |
| Upminster to Marginea | 1,165.93 mi (1,876.38 km) |
| Upminster to Matca | 1,296.23 mi (2,086.09 km) |
| Upminster to Medgidia | 1,381.61 mi (2,223.49 km) |
| Upminster to Media | 1,151.26 mi (1,852.77 km) |
| Upminster to Miercurea-Ciuc | 1,206.36 mi (1,941.45 km) |
| Upminster to Mioveni | 1,216.51 mi (1,957.78 km) |
| Upminster to Mizil | 1,278.18 mi (2,057.03 km) |
| Upminster to Moinesti | 1,233.16 mi (1,984.58 km) |
| Upminster to Moisei | 1,114.67 mi (1,793.90 km) |
| Upminster to Moldova Noua | 1,089.15 mi (1,752.82 km) |
| Upminster to Moreni | 1,245.28 mi (2,004.08 km) |
| Upminster to Motru | 1,139.85 mi (1,834.41 km) |
| Upminster to Murfatlar | 1,390.58 mi (2,237.93 km) |
