| Den Helder to Olivenza | 1,134.54 mi (1,825.86 km) |
| Den Helder to Olot | 750.17 mi (1,207.29 km) |
| Den Helder to Onate | 759.19 mi (1,221.81 km) |
| Den Helder to Onda | 926.86 mi (1,491.63 km) |
| Den Helder to Onteniente | 1,007.75 mi (1,621.82 km) |
| Den Helder to Orihuela | 1,061.47 mi (1,708.27 km) |
| Den Helder to Osuna | 1,183.85 mi (1,905.23 km) |
| Den Helder to Ourense | 935.76 mi (1,505.97 km) |
| Den Helder to Oviedo | 820.41 mi (1,320.33 km) |
| Den Helder to Paiporta | 964.70 mi (1,552.54 km) |
| Den Helder to Pajara | 1,951.74 mi (3,141.02 km) |
| Den Helder to Palafolls | 783.81 mi (1,261.42 km) |
| Den Helder to Palafrugell | 764.68 mi (1,230.63 km) |
| Den Helder to Palamos | 769.76 mi (1,238.81 km) |
| Den Helder to Palencia | 868.36 mi (1,397.49 km) |
