| San Marcos to Olivares | 5,847.64 mi (9,410.86 km) |
| San Marcos to Olivenza | 5,752.92 mi (9,258.43 km) |
| San Marcos to Olot | 5,980.92 mi (9,625.36 km) |
| San Marcos to Onate | 5,755.40 mi (9,262.42 km) |
| San Marcos to Onda | 5,978.37 mi (9,621.26 km) |
| San Marcos to Onteniente | 6,016.85 mi (9,683.18 km) |
| San Marcos to Orihuela | 6,036.65 mi (9,715.05 km) |
| San Marcos to Osuna | 5,900.64 mi (9,496.16 km) |
| San Marcos to Ourense | 5,568.48 mi (8,961.61 km) |
| San Marcos to Oviedo | 5,606.92 mi (9,023.47 km) |
| San Marcos to Paiporta | 5,996.73 mi (9,650.80 km) |
| San Marcos to Pajara | 5,850.28 mi (9,415.12 km) |
| San Marcos to Palafolls | 6,015.01 mi (9,680.23 km) |
| San Marcos to Palafrugell | 6,018.61 mi (9,686.02 km) |
| San Marcos to Palamos | 6,020.75 mi (9,689.47 km) |
