| Alsdorf to Olivenza | 1,061.27 mi (1,707.95 km) |
| Alsdorf to Olot | 625.88 mi (1,007.25 km) |
| Alsdorf to Onate | 675.81 mi (1,087.61 km) |
| Alsdorf to Onda | 815.69 mi (1,312.72 km) |
| Alsdorf to Onteniente | 896.03 mi (1,442.02 km) |
| Alsdorf to Orihuela | 950.14 mi (1,529.10 km) |
| Alsdorf to Osuna | 1,093.75 mi (1,760.22 km) |
| Alsdorf to Ourense | 887.37 mi (1,428.09 km) |
| Alsdorf to Oviedo | 765.79 mi (1,232.41 km) |
| Alsdorf to Paiporta | 853.21 mi (1,373.11 km) |
| Alsdorf to Pajara | 1,880.50 mi (3,026.36 km) |
| Alsdorf to Palafolls | 657.01 mi (1,057.36 km) |
| Alsdorf to Palafrugell | 635.66 mi (1,022.99 km) |
| Alsdorf to Palamos | 640.86 mi (1,031.37 km) |
| Alsdorf to Palencia | 795.06 mi (1,279.53 km) |
