| Borehamwood to Olivares | 1,024.82 mi (1,649.29 km) |
| Borehamwood to Olivenza | 954.97 mi (1,536.88 km) |
| Borehamwood to Olot | 667.41 mi (1,074.10 km) |
| Borehamwood to Onate | 604.22 mi (972.40 km) |
| Borehamwood to Onda | 808.07 mi (1,300.46 km) |
| Borehamwood to Onteniente | 887.00 mi (1,427.49 km) |
| Borehamwood to Orihuela | 938.32 mi (1,510.08 km) |
| Borehamwood to Osuna | 1,024.11 mi (1,648.15 km) |
| Borehamwood to Ourense | 735.80 mi (1,184.15 km) |
| Borehamwood to Oviedo | 629.10 mi (1,012.44 km) |
| Borehamwood to Paiporta | 845.04 mi (1,359.96 km) |
| Borehamwood to Pajara | 1,762.02 mi (2,835.69 km) |
| Borehamwood to Palafolls | 704.71 mi (1,134.12 km) |
| Borehamwood to Palafrugell | 692.14 mi (1,113.89 km) |
| Borehamwood to Palamos | 696.60 mi (1,121.07 km) |
