| Rome to Olivenza | 1,053.16 mi (1,694.90 km) |
| Rome to Olot | 512.94 mi (825.49 km) |
| Rome to Onate | 762.50 mi (1,227.12 km) |
| Rome to Onda | 677.97 mi (1,091.08 km) |
| Rome to Onteniente | 720.26 mi (1,159.15 km) |
| Rome to Orihuela | 757.02 mi (1,218.31 km) |
| Rome to Osuna | 988.19 mi (1,590.34 km) |
| Rome to Ourense | 1,040.77 mi (1,674.96 km) |
| Rome to Oviedo | 935.33 mi (1,505.27 km) |
| Rome to Paiporta | 696.56 mi (1,121.00 km) |
| Rome to Pajara | 1,758.60 mi (2,830.20 km) |
| Rome to Palafolls | 501.40 mi (806.92 km) |
| Rome to Palafrugell | 479.01 mi (770.89 km) |
| Rome to Palamos | 481.05 mi (774.17 km) |
| Rome to Palencia | 872.93 mi (1,404.85 km) |
