| Swindon to Orbetello | 876.10 mi (1,409.95 km) |
| Swindon to Oria | 1,198.12 mi (1,928.20 km) |
| Swindon to Oristano | 945.85 mi (1,522.21 km) |
| Swindon to Orta Nova | 1,087.28 mi (1,749.81 km) |
| Swindon to Orte | 913.97 mi (1,470.89 km) |
| Swindon to Ortona | 989.73 mi (1,592.82 km) |
| Swindon to Orvieto | 891.33 mi (1,434.45 km) |
| Swindon to Orzinuovi | 683.41 mi (1,099.85 km) |
| Swindon to Osimo | 901.74 mi (1,451.21 km) |
| Swindon to Ospitaletto | 681.22 mi (1,096.32 km) |
| Swindon to Ostuni | 1,184.73 mi (1,906.64 km) |
| Swindon to Ottaviano | 1,068.79 mi (1,720.05 km) |
| Swindon to Ovada | 677.08 mi (1,089.65 km) |
| Swindon to Ozieri | 915.60 mi (1,473.51 km) |
| Swindon to Paceco | 1,167.72 mi (1,879.26 km) |
