| Natchitoches to Orbetello | 5,422.21 mi (8,726.21 km) |
| Natchitoches to Oria | 5,771.54 mi (9,288.40 km) |
| Natchitoches to Oristano | 5,400.17 mi (8,690.73 km) |
| Natchitoches to Orta Nova | 5,656.67 mi (9,103.53 km) |
| Natchitoches to Orte | 5,471.55 mi (8,805.61 km) |
| Natchitoches to Ortona | 5,560.94 mi (8,949.47 km) |
| Natchitoches to Orvieto | 5,450.03 mi (8,770.98 km) |
| Natchitoches to Orzinuovi | 5,259.62 mi (8,464.55 km) |
| Natchitoches to Osimo | 5,478.50 mi (8,816.79 km) |
| Natchitoches to Ospitaletto | 5,259.82 mi (8,464.86 km) |
| Natchitoches to Ostuni | 5,759.79 mi (9,269.48 km) |
| Natchitoches to Ottaviano | 5,623.36 mi (9,049.93 km) |
| Natchitoches to Ovada | 5,232.94 mi (8,421.60 km) |
| Natchitoches to Ozieri | 5,393.95 mi (8,680.73 km) |
| Natchitoches to Paceco | 5,650.88 mi (9,094.21 km) |
