| Nieuwkoop to Olivenza | 1,092.66 mi (1,758.46 km) |
| Nieuwkoop to Olot | 699.14 mi (1,125.16 km) |
| Nieuwkoop to Onate | 714.48 mi (1,149.84 km) |
| Nieuwkoop to Onda | 877.59 mi (1,412.34 km) |
| Nieuwkoop to Onteniente | 958.47 mi (1,542.51 km) |
| Nieuwkoop to Orihuela | 1,012.29 mi (1,629.12 km) |
| Nieuwkoop to Osuna | 1,138.49 mi (1,832.22 km) |
| Nieuwkoop to Ourense | 899.43 mi (1,447.49 km) |
| Nieuwkoop to Oviedo | 782.22 mi (1,258.86 km) |
| Nieuwkoop to Paiporta | 915.42 mi (1,473.22 km) |
| Nieuwkoop to Pajara | 1,910.98 mi (3,075.43 km) |
| Nieuwkoop to Palafolls | 732.58 mi (1,178.97 km) |
| Nieuwkoop to Palafrugell | 713.26 mi (1,147.89 km) |
| Nieuwkoop to Palamos | 718.36 mi (1,156.08 km) |
| Nieuwkoop to Palencia | 826.00 mi (1,329.32 km) |
