| Nacogdoches to Orbetello | 5,494.21 mi (8,842.08 km) |
| Nacogdoches to Oria | 5,842.33 mi (9,402.32 km) |
| Nacogdoches to Oristano | 5,475.29 mi (8,811.62 km) |
| Nacogdoches to Orta Nova | 5,727.66 mi (9,217.78 km) |
| Nacogdoches to Orte | 5,543.04 mi (8,920.67 km) |
| Nacogdoches to Ortona | 5,631.66 mi (9,063.29 km) |
| Nacogdoches to Orvieto | 5,521.42 mi (8,885.87 km) |
| Nacogdoches to Orzinuovi | 5,329.54 mi (8,577.07 km) |
| Nacogdoches to Osimo | 5,548.65 mi (8,929.68 km) |
| Nacogdoches to Ospitaletto | 5,329.54 mi (8,577.06 km) |
| Nacogdoches to Ostuni | 5,830.41 mi (9,383.13 km) |
| Nacogdoches to Ottaviano | 5,695.30 mi (9,165.70 km) |
| Nacogdoches to Ovada | 5,304.04 mi (8,536.03 km) |
| Nacogdoches to Ozieri | 5,468.37 mi (8,800.49 km) |
| Nacogdoches to Paceco | 5,725.92 mi (9,214.98 km) |
