| Geraardsbergen to Olivenza | 990.92 mi (1,594.73 km) |
| Geraardsbergen to Olot | 596.71 mi (960.32 km) |
| Geraardsbergen to Onate | 610.62 mi (982.70 km) |
| Geraardsbergen to Onda | 772.64 mi (1,243.44 km) |
| Geraardsbergen to Onteniente | 853.53 mi (1,373.62 km) |
| Geraardsbergen to Orihuela | 907.30 mi (1,460.16 km) |
| Geraardsbergen to Osuna | 1,034.04 mi (1,664.13 km) |
| Geraardsbergen to Ourense | 804.31 mi (1,294.42 km) |
| Geraardsbergen to Oviedo | 685.02 mi (1,102.43 km) |
| Geraardsbergen to Paiporta | 810.48 mi (1,304.34 km) |
| Geraardsbergen to Pajara | 1,809.94 mi (2,912.82 km) |
| Geraardsbergen to Palafolls | 630.82 mi (1,015.20 km) |
| Geraardsbergen to Palafrugell | 612.34 mi (985.47 km) |
| Geraardsbergen to Palamos | 617.37 mi (993.56 km) |
| Geraardsbergen to Palencia | 724.05 mi (1,165.25 km) |
