| Barking to Olivares | 1,022.08 mi (1,644.88 km) |
| Barking to Olivenza | 953.54 mi (1,534.57 km) |
| Barking to Olot | 656.40 mi (1,056.38 km) |
| Barking to Onate | 599.20 mi (964.31 km) |
| Barking to Onda | 800.10 mi (1,287.63 km) |
| Barking to Onteniente | 879.34 mi (1,415.16 km) |
| Barking to Orihuela | 930.95 mi (1,498.21 km) |
| Barking to Osuna | 1,020.39 mi (1,642.16 km) |
| Barking to Ourense | 737.12 mi (1,186.28 km) |
| Barking to Oviedo | 628.84 mi (1,012.02 km) |
| Barking to Paiporta | 837.21 mi (1,347.37 km) |
| Barking to Pajara | 1,762.42 mi (2,836.35 km) |
| Barking to Palafolls | 693.56 mi (1,116.18 km) |
| Barking to Palafrugell | 680.54 mi (1,095.22 km) |
| Barking to Palamos | 685.05 mi (1,102.48 km) |
