| Somma Lombardo to Olivenza | 939.93 mi (1,512.67 km) |
| Somma Lombardo to Olot | 392.26 mi (631.28 km) |
| Somma Lombardo to Onate | 578.31 mi (930.70 km) |
| Somma Lombardo to Onda | 601.49 mi (968.00 km) |
| Somma Lombardo to Onteniente | 670.91 mi (1,079.73 km) |
| Somma Lombardo to Orihuela | 721.34 mi (1,160.88 km) |
| Somma Lombardo to Osuna | 920.49 mi (1,481.39 km) |
| Somma Lombardo to Ourense | 853.19 mi (1,373.07 km) |
| Somma Lombardo to Oviedo | 733.17 mi (1,179.93 km) |
| Somma Lombardo to Paiporta | 633.42 mi (1,019.39 km) |
| Somma Lombardo to Pajara | 1,725.09 mi (2,776.27 km) |
| Somma Lombardo to Palafolls | 406.37 mi (653.99 km) |
| Somma Lombardo to Palafrugell | 379.23 mi (610.30 km) |
| Somma Lombardo to Palamos | 383.98 mi (617.96 km) |
| Somma Lombardo to Palencia | 705.31 mi (1,135.09 km) |
