| Viersen to Olivenza | 1,087.04 mi (1,749.43 km) |
| Viersen to Olot | 653.46 mi (1,051.64 km) |
| Viersen to Onate | 702.03 mi (1,129.80 km) |
| Viersen to Onda | 843.26 mi (1,357.10 km) |
| Viersen to Onteniente | 923.62 mi (1,486.43 km) |
| Viersen to Orihuela | 977.73 mi (1,573.51 km) |
| Viersen to Osuna | 1,120.62 mi (1,803.47 km) |
| Viersen to Ourense | 910.78 mi (1,465.75 km) |
| Viersen to Oviedo | 789.65 mi (1,270.83 km) |
| Viersen to Paiporta | 880.80 mi (1,417.51 km) |
| Viersen to Pajara | 1,906.38 mi (3,068.01 km) |
| Viersen to Palafolls | 684.52 mi (1,101.63 km) |
| Viersen to Palafrugell | 663.09 mi (1,067.14 km) |
| Viersen to Palamos | 668.30 mi (1,075.52 km) |
| Viersen to Palencia | 820.64 mi (1,320.70 km) |
