| Niel to Olivenza | 1,022.46 mi (1,645.48 km) |
| Niel to Olot | 623.43 mi (1,003.31 km) |
| Niel to Onate | 641.88 mi (1,033.00 km) |
| Niel to Onda | 801.74 mi (1,290.27 km) |
| Niel to Onteniente | 882.61 mi (1,420.43 km) |
| Niel to Orihuela | 936.46 mi (1,507.09 km) |
| Niel to Osuna | 1,065.05 mi (1,714.03 km) |
| Niel to Ourense | 835.58 mi (1,344.73 km) |
| Niel to Oviedo | 716.46 mi (1,153.03 km) |
| Niel to Paiporta | 839.56 mi (1,351.15 km) |
| Niel to Pajara | 1,841.51 mi (2,963.62 km) |
| Niel to Palafolls | 657.06 mi (1,057.43 km) |
| Niel to Palafrugell | 638.02 mi (1,026.79 km) |
| Niel to Palamos | 643.09 mi (1,034.95 km) |
| Niel to Palencia | 755.59 mi (1,216.00 km) |
