| Kingsport to Orbetello | 4,748.91 mi (7,642.63 km) |
| Kingsport to Oria | 5,101.02 mi (8,209.30 km) |
| Kingsport to Oristano | 4,719.85 mi (7,595.87 km) |
| Kingsport to Orta Nova | 4,985.73 mi (8,023.76 km) |
| Kingsport to Orte | 4,799.48 mi (7,724.02 km) |
| Kingsport to Ortona | 4,890.83 mi (7,871.02 km) |
| Kingsport to Orvieto | 4,778.26 mi (7,689.87 km) |
| Kingsport to Orzinuovi | 4,592.11 mi (7,390.29 km) |
| Kingsport to Osimo | 4,810.04 mi (7,741.02 km) |
| Kingsport to Ospitaletto | 4,592.87 mi (7,391.51 km) |
| Kingsport to Ostuni | 5,089.73 mi (8,191.13 km) |
| Kingsport to Ottaviano | 4,950.02 mi (7,966.29 km) |
| Kingsport to Ovada | 4,562.16 mi (7,342.09 km) |
| Kingsport to Ozieri | 4,715.07 mi (7,588.17 km) |
| Kingsport to Paceco | 4,970.58 mi (7,999.38 km) |
