| Kars to Orbetello | 1,644.43 mi (2,646.45 km) |
| Kars to Oria | 1,332.02 mi (2,143.68 km) |
| Kars to Oristano | 1,808.28 mi (2,910.15 km) |
| Kars to Orta Nova | 1,423.57 mi (2,291.01 km) |
| Kars to Orte | 1,584.79 mi (2,550.47 km) |
| Kars to Ortona | 1,483.23 mi (2,387.03 km) |
| Kars to Orvieto | 1,597.01 mi (2,570.14 km) |
| Kars to Orzinuovi | 1,695.47 mi (2,728.59 km) |
| Kars to Osimo | 1,524.17 mi (2,452.92 km) |
| Kars to Ospitaletto | 1,688.61 mi (2,717.55 km) |
| Kars to Ostuni | 1,332.27 mi (2,144.09 km) |
| Kars to Ottaviano | 1,491.81 mi (2,400.83 km) |
| Kars to Ovada | 1,760.00 mi (2,832.44 km) |
| Kars to Ozieri | 1,777.23 mi (2,860.17 km) |
| Kars to Paceco | 1,635.08 mi (2,631.40 km) |
