| Port Glasgow to Santa Venerina | 1,559.29 mi (2,509.44 km) |
| Port Glasgow to Santeramo in Colle | 1,424.79 mi (2,292.98 km) |
| Port Glasgow to Santo Stefano di Magra | 1,035.52 mi (1,666.50 km) |
| Port Glasgow to Santo Stino di Livenza | 1,029.81 mi (1,657.32 km) |
| Port Glasgow to Sarezzo | 959.26 mi (1,543.78 km) |
| Port Glasgow to Sarno | 1,360.18 mi (2,189.00 km) |
| Port Glasgow to Saronno | 927.68 mi (1,492.96 km) |
| Port Glasgow to Sarzana | 1,039.56 mi (1,673.02 km) |
| Port Glasgow to Sassari | 1,209.58 mi (1,946.63 km) |
| Port Glasgow to Sasso Marconi | 1,059.23 mi (1,704.67 km) |
| Port Glasgow to Sassuolo | 1,037.42 mi (1,669.57 km) |
| Port Glasgow to Sava | 1,471.70 mi (2,368.47 km) |
| Port Glasgow to Saviano | 1,351.54 mi (2,175.09 km) |
| Port Glasgow to Savigliano | 947.62 mi (1,525.05 km) |
| Port Glasgow to Savignano sul Panaro | 1,048.34 mi (1,687.14 km) |
