| Dartford to Olivares | 1,017.65 mi (1,637.75 km) |
| Dartford to Olivenza | 949.74 mi (1,528.46 km) |
| Dartford to Olot | 648.50 mi (1,043.66 km) |
| Dartford to Onate | 593.77 mi (955.57 km) |
| Dartford to Onda | 793.36 mi (1,276.79 km) |
| Dartford to Onteniente | 872.72 mi (1,404.51 km) |
| Dartford to Orihuela | 924.44 mi (1,487.75 km) |
| Dartford to Osuna | 1,015.50 mi (1,634.29 km) |
| Dartford to Ourense | 734.74 mi (1,182.45 km) |
| Dartford to Oviedo | 625.68 mi (1,006.94 km) |
| Dartford to Paiporta | 830.53 mi (1,336.61 km) |
| Dartford to Pajara | 1,759.48 mi (2,831.62 km) |
| Dartford to Palafolls | 685.61 mi (1,103.38 km) |
| Dartford to Palafrugell | 672.43 mi (1,082.17 km) |
| Dartford to Palamos | 676.96 mi (1,089.46 km) |
