| Swindon to Olivares | 1,000.20 mi (1,609.67 km) |
| Swindon to Olivenza | 925.94 mi (1,490.16 km) |
| Swindon to Olot | 678.29 mi (1,091.61 km) |
| Swindon to Onate | 589.89 mi (949.33 km) |
| Swindon to Onda | 804.59 mi (1,294.86 km) |
| Swindon to Onteniente | 881.92 mi (1,419.31 km) |
| Swindon to Orihuela | 931.87 mi (1,499.70 km) |
| Swindon to Osuna | 1,003.08 mi (1,614.31 km) |
| Swindon to Ourense | 698.31 mi (1,123.82 km) |
| Swindon to Oviedo | 597.30 mi (961.26 km) |
| Swindon to Paiporta | 840.80 mi (1,353.14 km) |
| Swindon to Pajara | 1,725.84 mi (2,777.48 km) |
| Swindon to Palafolls | 716.06 mi (1,152.39 km) |
| Swindon to Palafrugell | 705.74 mi (1,135.78 km) |
| Swindon to Palamos | 709.93 mi (1,142.53 km) |
