| Opelousas to Olivares | 4,772.59 mi (7,680.73 km) |
| Opelousas to Olivenza | 4,691.11 mi (7,549.61 km) |
| Opelousas to Olot | 5,052.81 mi (8,131.72 km) |
| Opelousas to Onate | 4,801.61 mi (7,727.44 km) |
| Opelousas to Onda | 4,990.24 mi (8,031.01 km) |
| Opelousas to Onteniente | 5,007.43 mi (8,058.68 km) |
| Opelousas to Orihuela | 5,012.71 mi (8,067.17 km) |
| Opelousas to Osuna | 4,830.57 mi (7,774.05 km) |
| Opelousas to Ourense | 4,562.40 mi (7,342.48 km) |
| Opelousas to Oviedo | 4,633.11 mi (7,456.27 km) |
| Opelousas to Paiporta | 4,998.62 mi (8,044.51 km) |
| Opelousas to Pajara | 4,593.44 mi (7,392.43 km) |
| Opelousas to Palafolls | 5,080.59 mi (8,176.42 km) |
| Opelousas to Palafrugell | 5,091.93 mi (8,194.67 km) |
| Opelousas to Palamos | 5,092.58 mi (8,195.71 km) |
