| San Marino to Olivares | 5,842.02 mi (9,401.82 km) |
| San Marino to Olivenza | 5,746.50 mi (9,248.10 km) |
| San Marino to Olot | 5,963.30 mi (9,597.01 km) |
| San Marino to Onate | 5,740.47 mi (9,238.40 km) |
| San Marino to Onda | 5,965.31 mi (9,600.23 km) |
| San Marino to Onteniente | 6,005.32 mi (9,664.63 km) |
| San Marino to Orihuela | 6,026.22 mi (9,698.26 km) |
| San Marino to Osuna | 5,894.44 mi (9,486.18 km) |
| San Marino to Ourense | 5,558.21 mi (8,945.07 km) |
| San Marino to Oviedo | 5,594.03 mi (9,002.72 km) |
| San Marino to Paiporta | 5,984.38 mi (9,630.93 km) |
| San Marino to Pajara | 5,861.78 mi (9,433.63 km) |
| San Marino to Palafolls | 5,997.75 mi (9,652.44 km) |
| San Marino to Palafrugell | 6,000.76 mi (9,657.29 km) |
| San Marino to Palamos | 6,003.01 mi (9,660.90 km) |
