| Thornaby on Tees to Mangualde | 1,009.00 mi (1,623.82 km) |
| Thornaby on Tees to Marco de Canavezes | 975.98 mi (1,570.69 km) |
| Thornaby on Tees to Marinha Grande | 1,082.63 mi (1,742.33 km) |
| Thornaby on Tees to Massama | 1,153.62 mi (1,856.58 km) |
| Thornaby on Tees to Matosinhos | 984.37 mi (1,584.20 km) |
| Thornaby on Tees to Mealhada | 1,033.44 mi (1,663.16 km) |
| Thornaby on Tees to Melgaco | 916.13 mi (1,474.37 km) |
| Thornaby on Tees to Melres | 987.43 mi (1,589.12 km) |
| Thornaby on Tees to Mira | 1,034.38 mi (1,664.67 km) |
| Thornaby on Tees to Miranda do Corvo | 1,050.57 mi (1,690.72 km) |
| Thornaby on Tees to Mirandela | 942.43 mi (1,516.69 km) |
| Thornaby on Tees to Mogadouro | 946.80 mi (1,523.73 km) |
| Thornaby on Tees to Moimenta da Beira | 981.94 mi (1,580.28 km) |
| Thornaby on Tees to Moita | 1,156.40 mi (1,861.05 km) |
| Thornaby on Tees to Moncao | 922.37 mi (1,484.42 km) |
