| Spanish Lake to Orbetello | 4,975.48 mi (8,007.27 km) |
| Spanish Lake to Oria | 5,318.96 mi (8,560.04 km) |
| Spanish Lake to Oristano | 4,968.90 mi (7,996.67 km) |
| Spanish Lake to Orta Nova | 5,205.13 mi (8,376.85 km) |
| Spanish Lake to Orte | 5,022.49 mi (8,082.91 km) |
| Spanish Lake to Ortona | 5,108.41 mi (8,221.19 km) |
| Spanish Lake to Orvieto | 5,000.55 mi (8,047.60 km) |
| Spanish Lake to Orzinuovi | 4,804.21 mi (7,731.62 km) |
| Spanish Lake to Osimo | 5,023.71 mi (8,084.87 km) |
| Spanish Lake to Ospitaletto | 4,803.60 mi (7,730.65 km) |
| Spanish Lake to Ostuni | 5,306.52 mi (8,540.03 km) |
| Spanish Lake to Ottaviano | 5,176.02 mi (8,330.00 km) |
| Spanish Lake to Ovada | 4,782.56 mi (7,696.79 km) |
| Spanish Lake to Ozieri | 4,958.98 mi (7,980.71 km) |
| Spanish Lake to Paceco | 5,218.65 mi (8,398.60 km) |
