| Seaham to Olivares | 1,224.95 mi (1,971.37 km) |
| Seaham to Olivenza | 1,148.01 mi (1,847.54 km) |
| Seaham to Olot | 891.61 mi (1,434.91 km) |
| Seaham to Onate | 817.20 mi (1,315.16 km) |
| Seaham to Onda | 1,029.14 mi (1,656.23 km) |
| Seaham to Onteniente | 1,107.25 mi (1,781.95 km) |
| Seaham to Orihuela | 1,157.76 mi (1,863.24 km) |
| Seaham to Osuna | 1,229.36 mi (1,978.46 km) |
| Seaham to Ourense | 912.94 mi (1,469.24 km) |
| Seaham to Oviedo | 818.52 mi (1,317.28 km) |
| Seaham to Paiporta | 1,065.74 mi (1,715.14 km) |
| Seaham to Pajara | 1,938.41 mi (3,119.58 km) |
| Seaham to Palafolls | 928.86 mi (1,494.86 km) |
| Seaham to Palafrugell | 915.99 mi (1,474.14 km) |
| Seaham to Palamos | 920.49 mi (1,481.39 km) |
