| Kingston upon Thames to Orbetello | 822.24 mi (1,323.27 km) |
| Kingston upon Thames to Oria | 1,139.16 mi (1,833.30 km) |
| Kingston upon Thames to Oristano | 901.91 mi (1,451.48 km) |
| Kingston upon Thames to Orta Nova | 1,029.16 mi (1,656.28 km) |
| Kingston upon Thames to Orte | 858.24 mi (1,381.20 km) |
| Kingston upon Thames to Ortona | 931.65 mi (1,499.34 km) |
| Kingston upon Thames to Orvieto | 835.56 mi (1,344.71 km) |
| Kingston upon Thames to Orzinuovi | 625.66 mi (1,006.90 km) |
| Kingston upon Thames to Osimo | 842.99 mi (1,356.66 km) |
| Kingston upon Thames to Ospitaletto | 622.93 mi (1,002.50 km) |
| Kingston upon Thames to Ostuni | 1,125.56 mi (1,811.41 km) |
| Kingston upon Thames to Ottaviano | 1,012.70 mi (1,629.79 km) |
| Kingston upon Thames to Ovada | 623.41 mi (1,003.28 km) |
| Kingston upon Thames to Ozieri | 869.54 mi (1,399.38 km) |
| Kingston upon Thames to Paceco | 1,118.44 mi (1,799.96 km) |
