| Upminster to Mancha Real | 969.77 mi (1,560.69 km) |
| Upminster to Manilva | 1,082.63 mi (1,742.33 km) |
| Upminster to Manises | 834.80 mi (1,343.48 km) |
| Upminster to Manlleu | 667.13 mi (1,073.64 km) |
| Upminster to Manresa | 683.21 mi (1,099.52 km) |
| Upminster to Manzanares | 885.19 mi (1,424.57 km) |
| Upminster to Manzanares el Real | 773.32 mi (1,244.54 km) |
| Upminster to Maracena | 1,009.89 mi (1,625.26 km) |
| Upminster to Marbella | 1,069.26 mi (1,720.80 km) |
| Upminster to Marchena | 1,020.89 mi (1,642.96 km) |
| Upminster to Marin | 759.58 mi (1,222.43 km) |
| Upminster to Marratxi | 831.85 mi (1,338.74 km) |
| Upminster to Martorell | 701.06 mi (1,128.25 km) |
| Upminster to Martos | 977.99 mi (1,573.92 km) |
| Upminster to Masamagrell | 828.58 mi (1,333.47 km) |
