| Casa de Oro-Mount Helix to Orbetello | 6,291.32 mi (10,124.91 km) |
| Casa de Oro-Mount Helix to Oria | 6,605.10 mi (10,629.87 km) |
| Casa de Oro-Mount Helix to Oristano | 6,329.10 mi (10,185.70 km) |
| Casa de Oro-Mount Helix to Orta Nova | 6,498.36 mi (10,458.10 km) |
| Casa de Oro-Mount Helix to Orte | 6,329.47 mi (10,186.30 km) |
| Casa de Oro-Mount Helix to Ortona | 6,401.20 mi (10,301.73 km) |
| Casa de Oro-Mount Helix to Orvieto | 6,306.81 mi (10,149.83 km) |
| Casa de Oro-Mount Helix to Orzinuovi | 6,096.44 mi (9,811.28 km) |
| Casa de Oro-Mount Helix to Osimo | 6,311.27 mi (10,157.01 km) |
| Casa de Oro-Mount Helix to Ospitaletto | 6,093.06 mi (9,805.83 km) |
| Casa de Oro-Mount Helix to Ostuni | 6,590.64 mi (10,606.62 km) |
| Casa de Oro-Mount Helix to Ottaviano | 6,484.07 mi (10,435.10 km) |
| Casa de Oro-Mount Helix to Ovada | 6,092.42 mi (9,804.81 km) |
| Casa de Oro-Mount Helix to Ozieri | 6,309.62 mi (10,154.36 km) |
| Casa de Oro-Mount Helix to Paceco | 6,569.99 mi (10,573.38 km) |
