| Boiling Springs to Orbetello | 4,786.52 mi (7,703.16 km) |
| Boiling Springs to Oria | 5,140.27 mi (8,272.47 km) |
| Boiling Springs to Oristano | 4,751.45 mi (7,646.72 km) |
| Boiling Springs to Orta Nova | 5,024.80 mi (8,086.63 km) |
| Boiling Springs to Orte | 4,837.95 mi (7,785.92 km) |
| Boiling Springs to Ortona | 4,930.52 mi (7,934.91 km) |
| Boiling Springs to Orvieto | 4,816.94 mi (7,752.12 km) |
| Boiling Springs to Orzinuovi | 4,633.74 mi (7,457.28 km) |
| Boiling Springs to Osimo | 4,850.89 mi (7,806.75 km) |
| Boiling Springs to Ospitaletto | 4,634.84 mi (7,459.05 km) |
| Boiling Springs to Ostuni | 5,129.29 mi (8,254.80 km) |
| Boiling Springs to Ottaviano | 4,987.44 mi (8,026.50 km) |
| Boiling Springs to Ovada | 4,601.72 mi (7,405.76 km) |
| Boiling Springs to Ozieri | 4,748.09 mi (7,641.32 km) |
| Boiling Springs to Paceco | 5,002.02 mi (8,049.97 km) |
