| Middlesbrough to Miranda de Ebro | 825.34 mi (1,328.26 km) |
| Middlesbrough to Mislata | 1,044.12 mi (1,680.35 km) |
| Middlesbrough to Moana | 915.35 mi (1,473.11 km) |
| Middlesbrough to Moguer | 1,224.44 mi (1,970.55 km) |
| Middlesbrough to Molina de Segura | 1,141.55 mi (1,837.15 km) |
| Middlesbrough to Molins de Rey | 921.55 mi (1,483.08 km) |
| Middlesbrough to Mollerusa | 899.70 mi (1,447.92 km) |
| Middlesbrough to Mollet | 914.72 mi (1,472.09 km) |
| Middlesbrough to Moncada | 917.88 mi (1,477.18 km) |
| Middlesbrough to Moncada | 1,039.28 mi (1,672.56 km) |
| Middlesbrough to Monforte de Lemos | 880.55 mi (1,417.11 km) |
| Middlesbrough to Monforte del Cid | 1,119.39 mi (1,801.48 km) |
| Middlesbrough to Mongat | 919.96 mi (1,480.53 km) |
| Middlesbrough to Monovar | 1,115.31 mi (1,794.91 km) |
| Middlesbrough to Monserrat | 1,051.96 mi (1,692.96 km) |
