| River Ridge to Olivares | 4,698.72 mi (7,561.86 km) |
| River Ridge to Olivenza | 4,618.80 mi (7,433.24 km) |
| River Ridge to Olot | 4,991.48 mi (8,033.01 km) |
| River Ridge to Onate | 4,739.01 mi (7,626.69 km) |
| River Ridge to Onda | 4,923.67 mi (7,923.88 km) |
| River Ridge to Onteniente | 4,938.83 mi (7,948.28 km) |
| River Ridge to Orihuela | 4,942.74 mi (7,954.58 km) |
| River Ridge to Osuna | 4,756.97 mi (7,655.60 km) |
| River Ridge to Ourense | 4,495.92 mi (7,235.49 km) |
| River Ridge to Oviedo | 4,569.38 mi (7,353.71 km) |
| River Ridge to Paiporta | 4,931.10 mi (7,935.85 km) |
| River Ridge to Pajara | 4,502.31 mi (7,245.77 km) |
| River Ridge to Palafolls | 5,018.57 mi (8,076.60 km) |
| River Ridge to Palafrugell | 5,030.56 mi (8,095.90 km) |
| River Ridge to Palamos | 5,031.06 mi (8,096.72 km) |
