| River Falls to Olivares | 4,311.78 mi (6,939.14 km) |
| River Falls to Olivenza | 4,217.98 mi (6,788.18 km) |
| River Falls to Olot | 4,472.58 mi (7,197.93 km) |
| River Falls to Onate | 4,238.72 mi (6,821.56 km) |
| River Falls to Onda | 4,455.77 mi (7,170.87 km) |
| River Falls to Onteniente | 4,490.40 mi (7,226.60 km) |
| River Falls to Orihuela | 4,507.83 mi (7,254.66 km) |
| River Falls to Osuna | 4,365.37 mi (7,025.38 km) |
| River Falls to Ourense | 4,040.07 mi (6,501.86 km) |
| River Falls to Oviedo | 4,084.73 mi (6,573.74 km) |
| River Falls to Paiporta | 4,472.27 mi (7,197.42 km) |
| River Falls to Pajara | 4,330.31 mi (6,968.97 km) |
| River Falls to Palafolls | 4,505.28 mi (7,250.55 km) |
| River Falls to Palafrugell | 4,510.99 mi (7,259.74 km) |
| River Falls to Palamos | 4,512.74 mi (7,262.56 km) |
