| Lake Butler to Orbetello | 5,051.01 mi (8,128.82 km) |
| Lake Butler to Oria | 5,408.60 mi (8,704.30 km) |
| Lake Butler to Oristano | 4,994.11 mi (8,037.24 km) |
| Lake Butler to Orta Nova | 5,293.14 mi (8,518.48 km) |
| Lake Butler to Orte | 5,105.18 mi (8,216.00 km) |
| Lake Butler to Ortona | 5,201.70 mi (8,371.32 km) |
| Lake Butler to Orvieto | 5,085.12 mi (8,183.70 km) |
| Lake Butler to Orzinuovi | 4,913.58 mi (7,907.65 km) |
| Lake Butler to Osimo | 5,126.64 mi (8,250.53 km) |
| Lake Butler to Ospitaletto | 4,915.90 mi (7,911.37 km) |
| Lake Butler to Ostuni | 5,398.82 mi (8,688.55 km) |
| Lake Butler to Ottaviano | 5,249.97 mi (8,449.02 km) |
| Lake Butler to Ovada | 4,874.37 mi (7,844.55 km) |
| Lake Butler to Ozieri | 4,996.04 mi (8,040.35 km) |
| Lake Butler to Paceco | 5,242.42 mi (8,436.87 km) |
