| Romsey to Opole | 845.81 mi (1,361.21 km) |
| Romsey to Orzesze | 887.59 mi (1,428.43 km) |
| Romsey to Osowa | 865.65 mi (1,393.12 km) |
| Romsey to Ostroda | 921.36 mi (1,482.79 km) |
| Romsey to Ostroleka | 986.51 mi (1,587.63 km) |
| Romsey to Ostrow Mazowiecka | 1,000.89 mi (1,610.77 km) |
| Romsey to Ostrow Wielkopolski | 832.78 mi (1,340.24 km) |
| Romsey to Ostrowiec Swietokrzyski | 992.41 mi (1,597.12 km) |
| Romsey to Ostrzeszow | 839.20 mi (1,350.56 km) |
| Romsey to Oswiecim | 909.62 mi (1,463.89 km) |
| Romsey to Otwock | 977.01 mi (1,572.34 km) |
| Romsey to Ozarow Mazowiecki | 956.78 mi (1,539.79 km) |
| Romsey to Ozimek | 857.84 mi (1,380.57 km) |
| Romsey to Ozorkow | 893.69 mi (1,438.26 km) |
| Romsey to Pabianice | 899.71 mi (1,447.94 km) |
