| Rocky River to Olivares | 3,916.06 mi (6,302.29 km) |
| Rocky River to Olivenza | 3,828.20 mi (6,160.89 km) |
| Rocky River to Olot | 4,148.21 mi (6,675.91 km) |
| Rocky River to Onate | 3,901.88 mi (6,279.46 km) |
| Rocky River to Onda | 4,102.71 mi (6,602.68 km) |
| Rocky River to Onteniente | 4,127.25 mi (6,642.16 km) |
| Rocky River to Orihuela | 4,137.78 mi (6,659.12 km) |
| Rocky River to Osuna | 3,972.39 mi (6,392.94 km) |
| Rocky River to Ourense | 3,677.01 mi (5,917.57 km) |
| Rocky River to Oviedo | 3,737.81 mi (6,015.43 km) |
| Rocky River to Paiporta | 4,114.48 mi (6,621.61 km) |
| Rocky River to Pajara | 3,845.60 mi (6,188.89 km) |
| Rocky River to Palafolls | 4,177.91 mi (6,723.70 km) |
| Rocky River to Palafrugell | 4,187.29 mi (6,738.79 km) |
| Rocky River to Palamos | 4,188.33 mi (6,740.47 km) |
