| Romsey to Oerlinghausen | 442.16 mi (711.59 km) |
| Romsey to Oestrich-Winkel | 422.66 mi (680.21 km) |
| Romsey to Offenburg | 455.38 mi (732.87 km) |
| Romsey to Oftersheim | 459.45 mi (739.42 km) |
| Romsey to Ohrdruf | 532.31 mi (856.67 km) |
| Romsey to Ohringen | 502.32 mi (808.41 km) |
| Romsey to Olbernhau | 646.51 mi (1,040.46 km) |
| Romsey to Olching | 604.41 mi (972.70 km) |
| Romsey to Oldenburg | 438.08 mi (705.02 km) |
| Romsey to Oldenburg in Holstein | 566.19 mi (911.20 km) |
| Romsey to Olfen | 386.21 mi (621.54 km) |
| Romsey to Olpe | 405.39 mi (652.41 km) |
| Romsey to Olsberg | 432.74 mi (696.43 km) |
| Romsey to Oranienburg | 639.06 mi (1,028.47 km) |
| Romsey to Ortenberg | 463.71 mi (746.27 km) |
