| Didcot to Sestu | 984.65 mi (1,584.64 km) |
| Didcot to Settimo Torinese | 608.18 mi (978.77 km) |
| Didcot to Seveso | 626.94 mi (1,008.96 km) |
| Didcot to Sezze | 971.20 mi (1,563.00 km) |
| Didcot to Siano | 1,062.33 mi (1,709.66 km) |
| Didcot to Siena | 818.11 mi (1,316.62 km) |
| Didcot to Signa | 786.42 mi (1,265.62 km) |
| Didcot to Silea | 740.66 mi (1,191.97 km) |
| Didcot to Silvi Paese | 952.44 mi (1,532.81 km) |
| Didcot to Sinalunga | 836.76 mi (1,346.63 km) |
| Didcot to Siniscola | 922.83 mi (1,485.15 km) |
| Didcot to Sinnai | 987.15 mi (1,588.67 km) |
| Didcot to Siracusa | 1,288.34 mi (2,073.39 km) |
| Didcot to Solaro | 626.49 mi (1,008.24 km) |
| Didcot to Soliera | 732.78 mi (1,179.29 km) |
