| Heiloo to Olivenza | 1,114.84 mi (1,794.16 km) |
| Heiloo to Olot | 727.21 mi (1,170.33 km) |
| Heiloo to Onate | 738.37 mi (1,188.29 km) |
| Heiloo to Onda | 904.42 mi (1,455.53 km) |
| Heiloo to Onteniente | 985.31 mi (1,585.71 km) |
| Heiloo to Orihuela | 1,039.07 mi (1,672.22 km) |
| Heiloo to Osuna | 1,162.83 mi (1,871.39 km) |
| Heiloo to Ourense | 918.24 mi (1,477.76 km) |
| Heiloo to Oviedo | 802.12 mi (1,290.88 km) |
| Heiloo to Paiporta | 942.26 mi (1,516.43 km) |
| Heiloo to Pajara | 1,932.53 mi (3,110.11 km) |
| Heiloo to Palafolls | 760.80 mi (1,224.39 km) |
| Heiloo to Palafrugell | 741.64 mi (1,193.55 km) |
| Heiloo to Palamos | 746.72 mi (1,201.73 km) |
| Heiloo to Palencia | 848.44 mi (1,365.44 km) |
