| Central Falls to Orbetello | 4,047.64 mi (6,514.04 km) |
| Central Falls to Oria | 4,400.43 mi (7,081.81 km) |
| Central Falls to Oristano | 4,017.95 mi (6,466.27 km) |
| Central Falls to Orta Nova | 4,285.05 mi (6,896.12 km) |
| Central Falls to Orte | 4,098.53 mi (6,595.95 km) |
| Central Falls to Ortona | 4,190.43 mi (6,743.85 km) |
| Central Falls to Orvieto | 4,077.39 mi (6,561.93 km) |
| Central Falls to Orzinuovi | 3,892.80 mi (6,264.86 km) |
| Central Falls to Osimo | 4,110.26 mi (6,614.83 km) |
| Central Falls to Ospitaletto | 3,893.79 mi (6,266.44 km) |
| Central Falls to Ostuni | 4,389.29 mi (7,063.87 km) |
| Central Falls to Ottaviano | 4,248.70 mi (6,837.62 km) |
| Central Falls to Ovada | 3,861.67 mi (6,214.76 km) |
| Central Falls to Ozieri | 4,013.07 mi (6,458.42 km) |
| Central Falls to Paceco | 4,268.69 mi (6,869.79 km) |
