| Belfast to Sestu | 1,266.60 mi (2,038.40 km) |
| Belfast to Settimo Torinese | 891.16 mi (1,434.18 km) |
| Belfast to Seveso | 906.59 mi (1,459.02 km) |
| Belfast to Sezze | 1,252.58 mi (2,015.84 km) |
| Belfast to Siano | 1,342.42 mi (2,160.42 km) |
| Belfast to Siena | 1,099.10 mi (1,768.83 km) |
| Belfast to Signa | 1,066.88 mi (1,716.98 km) |
| Belfast to Silea | 1,011.58 mi (1,627.98 km) |
| Belfast to Silvi Paese | 1,229.96 mi (1,979.44 km) |
| Belfast to Sinalunga | 1,117.28 mi (1,798.08 km) |
| Belfast to Siniscola | 1,206.22 mi (1,941.22 km) |
| Belfast to Sinnai | 1,269.26 mi (2,042.67 km) |
| Belfast to Siracusa | 1,571.48 mi (2,529.05 km) |
| Belfast to Solaro | 906.35 mi (1,458.63 km) |
| Belfast to Soliera | 1,011.15 mi (1,627.29 km) |
