| Middlesbrough to Opole | 845.04 mi (1,359.97 km) |
| Middlesbrough to Orzesze | 893.26 mi (1,437.57 km) |
| Middlesbrough to Osowa | 788.11 mi (1,268.34 km) |
| Middlesbrough to Ostroda | 857.06 mi (1,379.30 km) |
| Middlesbrough to Ostroleka | 931.67 mi (1,499.38 km) |
| Middlesbrough to Ostrow Mazowiecka | 950.12 mi (1,529.07 km) |
| Middlesbrough to Ostrow Wielkopolski | 812.82 mi (1,308.10 km) |
| Middlesbrough to Ostrowiec Swietokrzyski | 974.71 mi (1,568.64 km) |
| Middlesbrough to Ostrzeszow | 823.58 mi (1,325.43 km) |
| Middlesbrough to Oswiecim | 915.35 mi (1,473.12 km) |
| Middlesbrough to Otwock | 939.33 mi (1,511.71 km) |
| Middlesbrough to Ozarow Mazowiecki | 918.38 mi (1,478.00 km) |
| Middlesbrough to Ozimek | 855.87 mi (1,377.38 km) |
| Middlesbrough to Ozorkow | 863.47 mi (1,389.63 km) |
| Middlesbrough to Pabianice | 875.24 mi (1,408.56 km) |
