| San Mateo to Olivares | 5,850.90 mi (9,416.12 km) |
| San Mateo to Olivenza | 5,752.74 mi (9,258.15 km) |
| San Mateo to Olot | 5,925.28 mi (9,535.82 km) |
| San Mateo to Onate | 5,713.91 mi (9,195.65 km) |
| San Mateo to Onda | 5,944.93 mi (9,567.45 km) |
| San Mateo to Onteniente | 5,990.73 mi (9,641.15 km) |
| San Mateo to Orihuela | 6,015.76 mi (9,681.43 km) |
| San Mateo to Osuna | 5,900.83 mi (9,496.47 km) |
| San Mateo to Ourense | 5,550.45 mi (8,932.59 km) |
| San Mateo to Oviedo | 5,575.99 mi (8,973.69 km) |
| San Mateo to Paiporta | 5,966.69 mi (9,602.46 km) |
| San Mateo to Pajara | 5,935.67 mi (9,552.54 km) |
| San Mateo to Palafolls | 5,960.94 mi (9,593.20 km) |
| San Mateo to Palafrugell | 5,961.67 mi (9,594.38 km) |
| San Mateo to Palamos | 5,964.30 mi (9,598.61 km) |
