| Highland Springs to Orbetello | 4,475.50 mi (7,202.63 km) |
| Highland Springs to Oria | 4,829.53 mi (7,772.38 km) |
| Highland Springs to Oristano | 4,440.04 mi (7,145.55 km) |
| Highland Springs to Orta Nova | 4,714.03 mi (7,586.50 km) |
| Highland Springs to Orte | 4,527.07 mi (7,285.62 km) |
| Highland Springs to Ortona | 4,619.90 mi (7,435.01 km) |
| Highland Springs to Orvieto | 4,506.11 mi (7,251.89 km) |
| Highland Springs to Orzinuovi | 4,323.65 mi (6,958.25 km) |
| Highland Springs to Osimo | 4,540.55 mi (7,307.31 km) |
| Highland Springs to Ospitaletto | 4,324.86 mi (6,960.18 km) |
| Highland Springs to Ostuni | 4,818.62 mi (7,754.81 km) |
| Highland Springs to Ottaviano | 4,676.37 mi (7,525.90 km) |
| Highland Springs to Ovada | 4,291.10 mi (6,905.86 km) |
| Highland Springs to Ozieri | 4,436.67 mi (7,140.14 km) |
| Highland Springs to Paceco | 4,690.62 mi (7,548.82 km) |
