| River Grove to Olivares | 4,184.80 mi (6,734.78 km) |
| River Grove to Olivenza | 4,094.62 mi (6,589.65 km) |
| River Grove to Olot | 4,390.47 mi (7,065.78 km) |
| River Grove to Onate | 4,148.45 mi (6,676.29 km) |
| River Grove to Onda | 4,356.03 mi (7,010.35 km) |
| River Grove to Onteniente | 4,384.44 mi (7,056.07 km) |
| River Grove to Orihuela | 4,397.58 mi (7,077.22 km) |
| River Grove to Osuna | 4,240.25 mi (6,824.02 km) |
| River Grove to Ourense | 3,933.16 mi (6,329.82 km) |
| River Grove to Oviedo | 3,987.92 mi (6,417.93 km) |
| River Grove to Paiporta | 4,369.62 mi (7,032.22 km) |
| River Grove to Pajara | 4,142.69 mi (6,667.01 km) |
| River Grove to Palafolls | 4,421.42 mi (7,115.59 km) |
| River Grove to Palafrugell | 4,429.37 mi (7,128.39 km) |
| River Grove to Palamos | 4,430.70 mi (7,130.52 km) |
