| Billingham to Orbetello | 1,013.27 mi (1,630.70 km) |
| Billingham to Oria | 1,305.95 mi (2,101.72 km) |
| Billingham to Oristano | 1,113.75 mi (1,792.40 km) |
| Billingham to Orta Nova | 1,201.42 mi (1,933.49 km) |
| Billingham to Orte | 1,042.55 mi (1,677.82 km) |
| Billingham to Ortona | 1,105.14 mi (1,778.55 km) |
| Billingham to Orvieto | 1,020.01 mi (1,641.55 km) |
| Billingham to Orzinuovi | 805.72 mi (1,296.68 km) |
| Billingham to Osimo | 1,014.40 mi (1,632.52 km) |
| Billingham to Ospitaletto | 800.66 mi (1,288.53 km) |
| Billingham to Ostuni | 1,291.31 mi (2,078.17 km) |
| Billingham to Ottaviano | 1,194.01 mi (1,921.58 km) |
| Billingham to Ovada | 817.77 mi (1,316.07 km) |
| Billingham to Ozieri | 1,078.21 mi (1,735.21 km) |
| Billingham to Paceco | 1,319.37 mi (2,123.32 km) |
