| Hudson to Orbetello | 4,506.18 mi (7,252.00 km) |
| Hudson to Oria | 4,853.68 mi (7,811.24 km) |
| Hudson to Oristano | 4,491.24 mi (7,227.96 km) |
| Hudson to Orta Nova | 4,739.08 mi (7,626.81 km) |
| Hudson to Orte | 4,554.70 mi (7,330.08 km) |
| Hudson to Ortona | 4,643.01 mi (7,472.20 km) |
| Hudson to Orvieto | 4,533.03 mi (7,295.20 km) |
| Hudson to Orzinuovi | 4,340.76 mi (6,985.78 km) |
| Hudson to Osimo | 4,559.88 mi (7,338.42 km) |
| Hudson to Ospitaletto | 4,340.75 mi (6,985.77 km) |
| Hudson to Ostuni | 4,841.71 mi (7,791.99 km) |
| Hudson to Ottaviano | 4,707.21 mi (7,575.52 km) |
| Hudson to Ovada | 4,315.53 mi (6,945.18 km) |
| Hudson to Ozieri | 4,483.10 mi (7,214.85 km) |
| Hudson to Paceco | 4,741.61 mi (7,630.88 km) |
