| Saint Helens to Orbetello | 994.57 mi (1,600.61 km) |
| Saint Helens to Oria | 1,304.33 mi (2,099.12 km) |
| Saint Helens to Oristano | 1,076.29 mi (1,732.12 km) |
| Saint Helens to Orta Nova | 1,196.13 mi (1,924.98 km) |
| Saint Helens to Orte | 1,028.82 mi (1,655.72 km) |
| Saint Helens to Ortona | 1,098.84 mi (1,768.42 km) |
| Saint Helens to Orvieto | 1,006.13 mi (1,619.22 km) |
| Saint Helens to Orzinuovi | 794.21 mi (1,278.16 km) |
| Saint Helens to Osimo | 1,009.20 mi (1,624.15 km) |
| Saint Helens to Ospitaletto | 790.65 mi (1,272.42 km) |
| Saint Helens to Ostuni | 1,290.31 mi (2,076.55 km) |
| Saint Helens to Ottaviano | 1,182.65 mi (1,903.29 km) |
| Saint Helens to Ovada | 796.16 mi (1,281.29 km) |
| Saint Helens to Ozieri | 1,044.19 mi (1,680.46 km) |
| Saint Helens to Paceco | 1,292.80 mi (2,080.56 km) |
