| Opelousas to Oerlinghausen | 5,007.69 mi (8,059.10 km) |
| Opelousas to Oestrich-Winkel | 5,044.68 mi (8,118.63 km) |
| Opelousas to Offenburg | 5,091.28 mi (8,193.62 km) |
| Opelousas to Oftersheim | 5,088.09 mi (8,188.48 km) |
| Opelousas to Ohrdruf | 5,123.41 mi (8,245.33 km) |
| Opelousas to Ohringen | 5,129.98 mi (8,255.90 km) |
| Opelousas to Olbernhau | 5,227.36 mi (8,412.63 km) |
| Opelousas to Olching | 5,236.09 mi (8,426.67 km) |
| Opelousas to Oldenburg | 4,953.69 mi (7,972.20 km) |
| Opelousas to Oldenburg in Holstein | 5,013.45 mi (8,068.38 km) |
| Opelousas to Olfen | 4,966.74 mi (7,993.20 km) |
| Opelousas to Olpe | 5,005.92 mi (8,056.25 km) |
| Opelousas to Olsberg | 5,020.37 mi (8,079.51 km) |
| Opelousas to Oranienburg | 5,150.10 mi (8,288.28 km) |
| Opelousas to Ortenberg | 5,074.49 mi (8,166.61 km) |
