| Three Lakes to Orbetello | 5,122.55 mi (8,243.95 km) |
| Three Lakes to Oria | 5,480.81 mi (8,820.52 km) |
| Three Lakes to Oristano | 5,054.52 mi (8,134.46 km) |
| Three Lakes to Orta Nova | 5,365.78 mi (8,635.40 km) |
| Three Lakes to Orte | 5,177.96 mi (8,333.12 km) |
| Three Lakes to Ortona | 5,276.19 mi (8,491.20 km) |
| Three Lakes to Orvieto | 5,158.46 mi (8,301.74 km) |
| Three Lakes to Orzinuovi | 4,993.76 mi (8,036.68 km) |
| Three Lakes to Osimo | 5,203.84 mi (8,374.77 km) |
| Three Lakes to Ospitaletto | 4,996.71 mi (8,041.43 km) |
| Three Lakes to Ostuni | 5,471.70 mi (8,805.85 km) |
| Three Lakes to Ottaviano | 5,319.72 mi (8,561.27 km) |
| Three Lakes to Ovada | 4,950.89 mi (7,967.69 km) |
| Three Lakes to Ozieri | 5,059.17 mi (8,141.95 km) |
| Three Lakes to Paceco | 5,300.67 mi (8,530.60 km) |
