| Lake in the Hills to Orbetello | 4,750.34 mi (7,644.94 km) |
| Lake in the Hills to Oria | 5,090.54 mi (8,192.44 km) |
| Lake in the Hills to Oristano | 4,751.23 mi (7,646.36 km) |
| Lake in the Hills to Orta Nova | 4,977.36 mi (8,010.28 km) |
| Lake in the Hills to Orte | 4,796.15 mi (7,718.67 km) |
| Lake in the Hills to Ortona | 4,880.30 mi (7,854.09 km) |
| Lake in the Hills to Orvieto | 4,774.05 mi (7,683.09 km) |
| Lake in the Hills to Orzinuovi | 4,575.15 mi (7,362.99 km) |
| Lake in the Hills to Osimo | 4,794.64 mi (7,716.23 km) |
| Lake in the Hills to Ospitaletto | 4,574.16 mi (7,361.40 km) |
| Lake in the Hills to Ostuni | 5,077.80 mi (8,171.93 km) |
| Lake in the Hills to Ottaviano | 4,950.28 mi (7,966.71 km) |
| Lake in the Hills to Ovada | 4,555.96 mi (7,332.11 km) |
| Lake in the Hills to Ozieri | 4,739.54 mi (7,627.55 km) |
| Lake in the Hills to Paceco | 5,000.05 mi (8,046.80 km) |
