| Silverdale to Orbetello | 5,605.30 mi (9,020.86 km) |
| Silverdale to Oria | 5,877.53 mi (9,458.97 km) |
| Silverdale to Oristano | 5,688.50 mi (9,154.76 km) |
| Silverdale to Orta Nova | 5,781.78 mi (9,304.87 km) |
| Silverdale to Orte | 5,633.12 mi (9,065.63 km) |
| Silverdale to Ortona | 5,688.32 mi (9,154.46 km) |
| Silverdale to Orvieto | 5,610.74 mi (9,029.61 km) |
| Silverdale to Orzinuovi | 5,396.26 mi (8,684.43 km) |
| Silverdale to Osimo | 5,597.41 mi (9,008.16 km) |
| Silverdale to Ospitaletto | 5,390.43 mi (8,675.06 km) |
| Silverdale to Ostuni | 5,861.86 mi (9,433.75 km) |
| Silverdale to Ottaviano | 5,782.10 mi (9,305.39 km) |
| Silverdale to Ovada | 5,409.28 mi (8,705.39 km) |
| Silverdale to Ozieri | 5,659.18 mi (9,107.57 km) |
| Silverdale to Paceco | 5,908.94 mi (9,509.52 km) |
