| Arnold to Orbetello | 925.67 mi (1,489.72 km) |
| Arnold to Oria | 1,231.96 mi (1,982.64 km) |
| Arnold to Oristano | 1,014.32 mi (1,632.38 km) |
| Arnold to Orta Nova | 1,124.31 mi (1,809.40 km) |
| Arnold to Orte | 958.64 mi (1,542.79 km) |
| Arnold to Ortona | 1,027.15 mi (1,653.03 km) |
| Arnold to Orvieto | 935.98 mi (1,506.31 km) |
| Arnold to Orzinuovi | 723.28 mi (1,164.00 km) |
| Arnold to Osimo | 937.25 mi (1,508.35 km) |
| Arnold to Ospitaletto | 719.39 mi (1,157.75 km) |
| Arnold to Ostuni | 1,217.84 mi (1,959.92 km) |
| Arnold to Ottaviano | 1,112.04 mi (1,789.66 km) |
| Arnold to Ovada | 727.86 mi (1,171.37 km) |
| Arnold to Ozieri | 980.69 mi (1,578.26 km) |
| Arnold to Paceco | 1,226.63 mi (1,974.06 km) |
