| Berkhampstead to Olivares | 1,027.72 mi (1,653.96 km) |
| Berkhampstead to Olivenza | 956.82 mi (1,539.85 km) |
| Berkhampstead to Olot | 677.03 mi (1,089.58 km) |
| Berkhampstead to Onate | 609.12 mi (980.29 km) |
| Berkhampstead to Onda | 815.25 mi (1,312.02 km) |
| Berkhampstead to Onteniente | 893.92 mi (1,438.62 km) |
| Berkhampstead to Orihuela | 945.00 mi (1,520.82 km) |
| Berkhampstead to Osuna | 1,027.82 mi (1,654.11 km) |
| Berkhampstead to Ourense | 735.45 mi (1,183.59 km) |
| Berkhampstead to Oviedo | 630.11 mi (1,014.07 km) |
| Berkhampstead to Paiporta | 852.10 mi (1,371.32 km) |
| Berkhampstead to Pajara | 1,762.24 mi (2,836.06 km) |
| Berkhampstead to Palafolls | 714.43 mi (1,149.76 km) |
| Berkhampstead to Palafrugell | 702.21 mi (1,130.10 km) |
| Berkhampstead to Palamos | 706.63 mi (1,137.22 km) |
