| Hamilton to Orbetello | 1,145.74 mi (1,843.90 km) |
| Hamilton to Oria | 1,441.52 mi (2,319.90 km) |
| Hamilton to Oristano | 1,238.78 mi (1,993.62 km) |
| Hamilton to Orta Nova | 1,336.64 mi (2,151.11 km) |
| Hamilton to Orte | 1,176.29 mi (1,893.05 km) |
| Hamilton to Ortona | 1,240.20 mi (1,995.91 km) |
| Hamilton to Orvieto | 1,153.70 mi (1,856.70 km) |
| Hamilton to Orzinuovi | 939.69 mi (1,512.29 km) |
| Hamilton to Osimo | 1,149.56 mi (1,850.03 km) |
| Hamilton to Ospitaletto | 934.91 mi (1,504.59 km) |
| Hamilton to Ostuni | 1,426.92 mi (2,296.40 km) |
| Hamilton to Ottaviano | 1,328.33 mi (2,137.75 km) |
| Hamilton to Ovada | 949.11 mi (1,527.45 km) |
| Hamilton to Ozieri | 1,204.95 mi (1,939.17 km) |
| Hamilton to Paceco | 1,449.50 mi (2,332.75 km) |
