| Siano to Olivenza | 1,164.04 mi (1,873.35 km) |
| Siano to Olot | 638.26 mi (1,027.18 km) |
| Siano to Onate | 891.49 mi (1,434.72 km) |
| Siano to Onda | 788.44 mi (1,268.88 km) |
| Siano to Onteniente | 822.46 mi (1,323.61 km) |
| Siano to Orihuela | 854.17 mi (1,374.65 km) |
| Siano to Osuna | 1,088.29 mi (1,751.44 km) |
| Siano to Ourense | 1,167.42 mi (1,878.78 km) |
| Siano to Oviedo | 1,065.18 mi (1,714.25 km) |
| Siano to Paiporta | 803.15 mi (1,292.55 km) |
| Siano to Pajara | 1,838.32 mi (2,958.49 km) |
| Siano to Palafolls | 622.96 mi (1,002.55 km) |
| Siano to Palafrugell | 602.48 mi (969.60 km) |
| Siano to Palamos | 603.96 mi (971.97 km) |
| Siano to Palencia | 997.79 mi (1,605.79 km) |
