| Billdal to Orbetello | 1,046.82 mi (1,684.69 km) |
| Billdal to Oria | 1,207.21 mi (1,942.81 km) |
| Billdal to Oristano | 1,230.48 mi (1,980.27 km) |
| Billdal to Orta Nova | 1,135.25 mi (1,827.00 km) |
| Billdal to Orte | 1,045.09 mi (1,681.90 km) |
| Billdal to Ortona | 1,058.04 mi (1,702.74 km) |
| Billdal to Orvieto | 1,027.10 mi (1,652.96 km) |
| Billdal to Orzinuovi | 846.07 mi (1,361.63 km) |
| Billdal to Osimo | 976.53 mi (1,571.57 km) |
| Billdal to Ospitaletto | 834.80 mi (1,343.49 km) |
| Billdal to Ostuni | 1,190.88 mi (1,916.53 km) |
| Billdal to Ottaviano | 1,161.64 mi (1,869.48 km) |
| Billdal to Ovada | 905.37 mi (1,457.06 km) |
| Billdal to Ozieri | 1,181.66 mi (1,901.70 km) |
| Billdal to Paceco | 1,354.52 mi (2,179.89 km) |
