| Southend to Olivares | 1,032.28 mi (1,661.30 km) |
| Southend to Olivenza | 965.65 mi (1,554.06 km) |
| Southend to Olot | 652.63 mi (1,050.31 km) |
| Southend to Onate | 606.27 mi (975.69 km) |
| Southend to Onda | 801.97 mi (1,290.65 km) |
| Southend to Onteniente | 881.70 mi (1,418.96 km) |
| Southend to Orihuela | 933.77 mi (1,502.76 km) |
| Southend to Osuna | 1,029.11 mi (1,656.20 km) |
| Southend to Ourense | 753.05 mi (1,211.91 km) |
| Southend to Oviedo | 642.82 mi (1,034.51 km) |
| Southend to Paiporta | 839.32 mi (1,350.75 km) |
| Southend to Pajara | 1,776.81 mi (2,859.50 km) |
| Southend to Palafolls | 689.46 mi (1,109.58 km) |
| Southend to Palafrugell | 675.51 mi (1,087.12 km) |
| Southend to Palamos | 680.12 mi (1,094.55 km) |
