| Thames Ditton to Orbetello | 822.18 mi (1,323.17 km) |
| Thames Ditton to Oria | 1,139.45 mi (1,833.77 km) |
| Thames Ditton to Oristano | 901.37 mi (1,450.62 km) |
| Thames Ditton to Orta Nova | 1,029.39 mi (1,656.64 km) |
| Thames Ditton to Orte | 858.30 mi (1,381.29 km) |
| Thames Ditton to Ortona | 931.87 mi (1,499.69 km) |
| Thames Ditton to Orvieto | 835.62 mi (1,344.80 km) |
| Thames Ditton to Orzinuovi | 625.84 mi (1,007.20 km) |
| Thames Ditton to Osimo | 843.25 mi (1,357.09 km) |
| Thames Ditton to Ospitaletto | 623.15 mi (1,002.86 km) |
| Thames Ditton to Ostuni | 1,125.86 mi (1,811.90 km) |
| Thames Ditton to Ottaviano | 1,012.79 mi (1,629.92 km) |
| Thames Ditton to Ovada | 623.33 mi (1,003.15 km) |
| Thames Ditton to Ozieri | 869.09 mi (1,398.66 km) |
| Thames Ditton to Paceco | 1,118.15 mi (1,799.49 km) |
