| Port Glasgow to San Dona di Piave | 1,031.53 mi (1,660.09 km) |
| Port Glasgow to San Donato Milanese | 945.88 mi (1,522.24 km) |
| Port Glasgow to San Felice Circeo | 1,292.92 mi (2,080.75 km) |
| Port Glasgow to San Felice sul Panaro | 1,031.53 mi (1,660.09 km) |
| Port Glasgow to San Ferdinando di Puglia | 1,375.47 mi (2,213.60 km) |
| Port Glasgow to San Gavino Monreale | 1,288.59 mi (2,073.78 km) |
| Port Glasgow to San Gennaro Vesuviano | 1,354.90 mi (2,180.50 km) |
| Port Glasgow to San Giorgio a Cremano | 1,351.11 mi (2,174.40 km) |
| Port Glasgow to San Giorgio del Sannio | 1,352.56 mi (2,176.73 km) |
| Port Glasgow to San Giorgio di Piano | 1,049.10 mi (1,688.37 km) |
| Port Glasgow to San Giorgio Ionico | 1,462.77 mi (2,354.11 km) |
| Port Glasgow to San Giovanni in Fiore | 1,510.35 mi (2,430.68 km) |
| Port Glasgow to San Giovanni in Marignano | 1,127.70 mi (1,814.85 km) |
| Port Glasgow to San Giovanni in Persiceto | 1,043.87 mi (1,679.94 km) |
| Port Glasgow to San Giovanni la Punta | 1,564.40 mi (2,517.66 km) |
