| Middle Valley to Olivares | 4,265.78 mi (6,865.11 km) |
| Middle Valley to Olivenza | 4,183.03 mi (6,731.93 km) |
| Middle Valley to Olot | 4,539.86 mi (7,306.20 km) |
| Middle Valley to Onate | 4,288.86 mi (6,902.26 km) |
| Middle Valley to Onda | 4,478.65 mi (7,207.70 km) |
| Middle Valley to Onteniente | 4,496.80 mi (7,236.90 km) |
| Middle Valley to Orihuela | 4,502.86 mi (7,246.65 km) |
| Middle Valley to Osuna | 4,323.50 mi (6,958.00 km) |
| Middle Valley to Ourense | 4,050.87 mi (6,519.24 km) |
| Middle Valley to Oviedo | 4,120.64 mi (6,631.52 km) |
| Middle Valley to Paiporta | 4,487.46 mi (7,221.86 km) |
| Middle Valley to Pajara | 4,115.06 mi (6,622.55 km) |
| Middle Valley to Palafolls | 4,567.73 mi (7,351.06 km) |
| Middle Valley to Palafrugell | 4,578.98 mi (7,369.16 km) |
| Middle Valley to Palamos | 4,579.64 mi (7,370.22 km) |
