| Buckhurst Hill to Olivares | 1,027.44 mi (1,653.50 km) |
| Buckhurst Hill to Olivenza | 958.57 mi (1,542.68 km) |
| Buckhurst Hill to Olot | 663.00 mi (1,067.00 km) |
| Buckhurst Hill to Onate | 605.02 mi (973.68 km) |
| Buckhurst Hill to Onda | 806.41 mi (1,297.79 km) |
| Buckhurst Hill to Onteniente | 885.62 mi (1,425.26 km) |
| Buckhurst Hill to Orihuela | 937.18 mi (1,508.24 km) |
| Buckhurst Hill to Osuna | 1,025.97 mi (1,651.13 km) |
| Buckhurst Hill to Ourense | 741.39 mi (1,193.16 km) |
| Buckhurst Hill to Oviedo | 633.56 mi (1,019.61 km) |
| Buckhurst Hill to Paiporta | 843.51 mi (1,357.50 km) |
| Buckhurst Hill to Pajara | 1,766.99 mi (2,843.69 km) |
| Buckhurst Hill to Palafolls | 700.17 mi (1,126.81 km) |
| Buckhurst Hill to Palafrugell | 687.16 mi (1,105.88 km) |
| Buckhurst Hill to Palamos | 691.67 mi (1,113.14 km) |
