| Aalst to Olivenza | 1,004.92 mi (1,617.26 km) |
| Aalst to Olot | 609.42 mi (980.76 km) |
| Aalst to Onate | 624.66 mi (1,005.30 km) |
| Aalst to Onda | 786.16 mi (1,265.20 km) |
| Aalst to Onteniente | 867.05 mi (1,395.38 km) |
| Aalst to Orihuela | 920.84 mi (1,481.95 km) |
| Aalst to Osuna | 1,048.06 mi (1,686.69 km) |
| Aalst to Ourense | 817.83 mi (1,316.17 km) |
| Aalst to Oviedo | 698.70 mi (1,124.46 km) |
| Aalst to Paiporta | 824.00 mi (1,326.09 km) |
| Aalst to Pajara | 1,823.92 mi (2,935.32 km) |
| Aalst to Palafolls | 643.35 mi (1,035.37 km) |
| Aalst to Palafrugell | 624.67 mi (1,005.30 km) |
| Aalst to Palamos | 629.71 mi (1,013.43 km) |
| Aalst to Palencia | 738.06 mi (1,187.79 km) |
