| Opelousas to Nuth | 4,933.05 mi (7,938.98 km) |
| Opelousas to Oegstgeest | 4,840.78 mi (7,790.49 km) |
| Opelousas to Oirschot | 4,892.90 mi (7,874.36 km) |
| Opelousas to Oisterwijk | 4,886.56 mi (7,864.16 km) |
| Opelousas to Oldebroek | 4,887.93 mi (7,866.37 km) |
| Opelousas to Oldenzaal | 4,931.18 mi (7,935.97 km) |
| Opelousas to Ommen | 4,905.56 mi (7,894.74 km) |
| Opelousas to Oosterend | 4,877.86 mi (7,850.15 km) |
| Opelousas to Oosterhout | 4,871.47 mi (7,839.88 km) |
| Opelousas to Oosterwolde | 4,886.70 mi (7,864.39 km) |
| Opelousas to Oostzaan | 4,849.61 mi (7,804.70 km) |
| Opelousas to Opmeer | 4,844.48 mi (7,796.44 km) |
| Opelousas to Oss | 4,893.43 mi (7,875.22 km) |
| Opelousas to Oud-Beijerland | 4,848.70 mi (7,803.22 km) |
| Opelousas to Oudenbosch | 4,860.06 mi (7,821.52 km) |
