| Witham to Olivares | 1,047.10 mi (1,685.14 km) |
| Witham to Olivenza | 979.72 mi (1,576.70 km) |
| Witham to Olot | 670.02 mi (1,078.30 km) |
| Witham to Onate | 622.03 mi (1,001.05 km) |
| Witham to Onda | 818.87 mi (1,317.85 km) |
| Witham to Onteniente | 898.53 mi (1,446.04 km) |
| Witham to Orihuela | 950.52 mi (1,529.72 km) |
| Witham to Osuna | 1,044.43 mi (1,680.85 km) |
| Witham to Ourense | 765.25 mi (1,231.55 km) |
| Witham to Oviedo | 656.01 mi (1,055.75 km) |
| Witham to Paiporta | 856.18 mi (1,377.89 km) |
| Witham to Pajara | 1,789.88 mi (2,880.53 km) |
| Witham to Palafolls | 706.86 mi (1,137.58 km) |
| Witham to Palafrugell | 692.91 mi (1,115.13 km) |
| Witham to Palamos | 697.52 mi (1,122.55 km) |
