| Keystone to Olivares | 4,367.99 mi (7,029.60 km) |
| Keystone to Olivenza | 4,294.54 mi (6,911.39 km) |
| Keystone to Olot | 4,707.14 mi (7,575.40 km) |
| Keystone to Onate | 4,451.47 mi (7,163.95 km) |
| Keystone to Onda | 4,619.59 mi (7,434.51 km) |
| Keystone to Onteniente | 4,626.86 mi (7,446.20 km) |
| Keystone to Orihuela | 4,625.53 mi (7,444.07 km) |
| Keystone to Osuna | 4,426.90 mi (7,124.41 km) |
| Keystone to Ourense | 4,195.00 mi (6,751.20 km) |
| Keystone to Oviedo | 4,278.64 mi (6,885.80 km) |
| Keystone to Paiporta | 4,623.32 mi (7,440.51 km) |
| Keystone to Pajara | 4,107.39 mi (6,610.21 km) |
| Keystone to Palafolls | 4,731.36 mi (7,614.39 km) |
| Keystone to Palafrugell | 4,745.80 mi (7,637.62 km) |
| Keystone to Palamos | 4,745.77 mi (7,637.57 km) |
