| Opelousas to Orbetello | 5,435.14 mi (8,747.01 km) |
| Opelousas to Oria | 5,786.42 mi (9,312.35 km) |
| Opelousas to Oristano | 5,407.28 mi (8,702.18 km) |
| Opelousas to Orta Nova | 5,671.25 mi (9,127.00 km) |
| Opelousas to Orte | 5,485.35 mi (8,827.81 km) |
| Opelousas to Ortona | 5,576.05 mi (8,973.78 km) |
| Opelousas to Orvieto | 5,464.03 mi (8,793.50 km) |
| Opelousas to Orzinuovi | 5,276.28 mi (8,491.35 km) |
| Opelousas to Osimo | 5,494.63 mi (8,842.76 km) |
| Opelousas to Ospitaletto | 5,276.81 mi (8,492.20 km) |
| Opelousas to Ostuni | 5,774.97 mi (9,293.91 km) |
| Opelousas to Ottaviano | 5,636.29 mi (9,070.73 km) |
| Opelousas to Ovada | 5,247.56 mi (8,445.13 km) |
| Opelousas to Ozieri | 5,402.43 mi (8,694.37 km) |
| Opelousas to Paceco | 5,658.01 mi (9,105.69 km) |
