| Sierning to Olivenza | 1,248.57 mi (2,009.38 km) |
| Sierning to Olot | 703.23 mi (1,131.74 km) |
| Sierning to Onate | 878.10 mi (1,413.16 km) |
| Sierning to Onda | 912.02 mi (1,467.75 km) |
| Sierning to Onteniente | 979.92 mi (1,577.04 km) |
| Sierning to Orihuela | 1,029.34 mi (1,656.57 km) |
| Sierning to Osuna | 1,231.57 mi (1,982.02 km) |
| Sierning to Ourense | 1,144.57 mi (1,842.01 km) |
| Sierning to Oviedo | 1,021.49 mi (1,643.92 km) |
| Sierning to Paiporta | 943.31 mi (1,518.11 km) |
| Sierning to Pajara | 2,035.95 mi (3,276.54 km) |
| Sierning to Palafolls | 716.05 mi (1,152.37 km) |
| Sierning to Palafrugell | 688.78 mi (1,108.48 km) |
| Sierning to Palamos | 693.39 mi (1,115.90 km) |
| Sierning to Palencia | 1,006.54 mi (1,619.87 km) |
