| Duffel to Olivenza | 1,026.39 mi (1,651.82 km) |
| Duffel to Olot | 623.56 mi (1,003.52 km) |
| Duffel to Onate | 645.18 mi (1,038.32 km) |
| Duffel to Onda | 803.12 mi (1,292.50 km) |
| Duffel to Onteniente | 883.97 mi (1,422.62 km) |
| Duffel to Orihuela | 937.87 mi (1,509.35 km) |
| Duffel to Osuna | 1,067.99 mi (1,718.76 km) |
| Duffel to Ourense | 840.77 mi (1,353.09 km) |
| Duffel to Oviedo | 721.37 mi (1,160.93 km) |
| Duffel to Paiporta | 840.93 mi (1,353.35 km) |
| Duffel to Pajara | 1,845.56 mi (2,970.14 km) |
| Duffel to Palafolls | 656.97 mi (1,057.29 km) |
| Duffel to Palafrugell | 637.68 mi (1,026.25 km) |
| Duffel to Palamos | 642.77 mi (1,034.44 km) |
| Duffel to Palencia | 759.51 mi (1,222.31 km) |
