| Romford to Oerlinghausen | 363.63 mi (585.21 km) |
| Romford to Oestrich-Winkel | 358.32 mi (576.66 km) |
| Romford to Offenburg | 405.44 mi (652.49 km) |
| Romford to Oftersheim | 399.48 mi (642.91 km) |
| Romford to Ohrdruf | 459.36 mi (739.26 km) |
| Romford to Ohringen | 441.79 mi (711.00 km) |
| Romford to Olbernhau | 573.09 mi (922.30 km) |
| Romford to Olching | 547.15 mi (880.56 km) |
| Romford to Oldenburg | 355.63 mi (572.33 km) |
| Romford to Oldenburg in Holstein | 483.15 mi (777.56 km) |
| Romford to Olfen | 308.85 mi (497.04 km) |
| Romford to Olpe | 332.74 mi (535.50 km) |
| Romford to Olsberg | 357.57 mi (575.46 km) |
| Romford to Oranienburg | 558.51 mi (898.83 km) |
| Romford to Ortenberg | 395.03 mi (635.74 km) |
