| Welling to Olivares | 1,017.28 mi (1,637.15 km) |
| Welling to Olivenza | 948.98 mi (1,527.24 km) |
| Welling to Olot | 650.69 mi (1,047.19 km) |
| Welling to Onate | 594.03 mi (955.99 km) |
| Welling to Onda | 794.56 mi (1,278.72 km) |
| Welling to Onteniente | 873.83 mi (1,406.30 km) |
| Welling to Orihuela | 925.47 mi (1,489.39 km) |
| Welling to Osuna | 1,015.41 mi (1,634.15 km) |
| Welling to Ourense | 733.19 mi (1,179.96 km) |
| Welling to Oviedo | 624.55 mi (1,005.12 km) |
| Welling to Paiporta | 831.69 mi (1,338.48 km) |
| Welling to Pajara | 1,758.25 mi (2,829.62 km) |
| Welling to Palafolls | 687.85 mi (1,106.99 km) |
| Welling to Palafrugell | 674.83 mi (1,086.03 km) |
| Welling to Palamos | 679.34 mi (1,093.29 km) |
