| Port Glasgow to San Maurizio Canavese | 913.92 mi (1,470.82 km) |
| Port Glasgow to San Mauro Pascoli | 1,109.99 mi (1,786.35 km) |
| Port Glasgow to San Mauro Torinese | 923.73 mi (1,486.59 km) |
| Port Glasgow to San Michele al Tagliamento | 1,038.05 mi (1,670.58 km) |
| Port Glasgow to San Miniato | 1,088.75 mi (1,752.17 km) |
| Port Glasgow to San Pancrazio Salentino | 1,479.00 mi (2,380.22 km) |
| Port Glasgow to San Pietro in Casale | 1,046.81 mi (1,684.68 km) |
| Port Glasgow to San Pietro Vernotico | 1,482.01 mi (2,385.06 km) |
| Port Glasgow to San Prisco | 1,335.23 mi (2,148.84 km) |
| Port Glasgow to San Remo | 1,001.11 mi (1,611.13 km) |
| Port Glasgow to San Salvo | 1,293.49 mi (2,081.66 km) |
| Port Glasgow to San Sebastiano al Vesuvio | 1,352.06 mi (2,175.93 km) |
| Port Glasgow to San Severino Marche | 1,181.00 mi (1,900.64 km) |
| Port Glasgow to San Severo | 1,332.56 mi (2,144.54 km) |
| Port Glasgow to San Valentino Torio | 1,361.27 mi (2,190.76 km) |
