| Llantwit Major to Olivares | 975.38 mi (1,569.73 km) |
| Llantwit Major to Olivenza | 896.25 mi (1,442.37 km) |
| Llantwit Major to Olot | 696.39 mi (1,120.74 km) |
| Llantwit Major to Onate | 580.62 mi (934.42 km) |
| Llantwit Major to Onda | 805.52 mi (1,296.37 km) |
| Llantwit Major to Onteniente | 880.46 mi (1,416.97 km) |
| Llantwit Major to Orihuela | 928.54 mi (1,494.34 km) |
| Llantwit Major to Osuna | 982.48 mi (1,581.14 km) |
| Llantwit Major to Ourense | 659.74 mi (1,061.76 km) |
| Llantwit Major to Oviedo | 566.81 mi (912.18 km) |
| Llantwit Major to Paiporta | 840.60 mi (1,352.82 km) |
| Llantwit Major to Pajara | 1,685.63 mi (2,712.77 km) |
| Llantwit Major to Palafolls | 734.30 mi (1,181.74 km) |
| Llantwit Major to Palafrugell | 726.54 mi (1,169.25 km) |
| Llantwit Major to Palamos | 730.40 mi (1,175.46 km) |
