| Middlesbrough to Oerlinghausen | 446.62 mi (718.77 km) |
| Middlesbrough to Oestrich-Winkel | 501.65 mi (807.33 km) |
| Middlesbrough to Offenburg | 576.67 mi (928.06 km) |
| Middlesbrough to Oftersheim | 550.56 mi (886.05 km) |
| Middlesbrough to Ohrdruf | 563.06 mi (906.16 km) |
| Middlesbrough to Ohringen | 588.48 mi (947.07 km) |
| Middlesbrough to Olbernhau | 666.52 mi (1,072.66 km) |
| Middlesbrough to Olching | 696.12 mi (1,120.30 km) |
| Middlesbrough to Oldenburg | 397.23 mi (639.28 km) |
| Middlesbrough to Oldenburg in Holstein | 486.74 mi (783.34 km) |
| Middlesbrough to Olfen | 407.79 mi (656.27 km) |
| Middlesbrough to Olpe | 451.18 mi (726.11 km) |
| Middlesbrough to Olsberg | 461.27 mi (742.35 km) |
| Middlesbrough to Oranienburg | 604.54 mi (972.91 km) |
| Middlesbrough to Ortenberg | 521.40 mi (839.12 km) |
