| Caernarfon to Sereflikochisar | 2,029.01 mi (3,265.38 km) |
| Caernarfon to Serik | 2,027.73 mi (3,263.31 km) |
| Caernarfon to Serinhisar | 1,924.00 mi (3,096.39 km) |
| Caernarfon to Serinyol | 2,256.59 mi (3,631.64 km) |
| Caernarfon to Seydisehir | 2,032.98 mi (3,271.77 km) |
| Caernarfon to Seyhan | 2,192.42 mi (3,528.36 km) |
| Caernarfon to Seyitgazi | 1,891.87 mi (3,044.66 km) |
| Caernarfon to Siirt | 2,418.06 mi (3,891.49 km) |
| Caernarfon to Sile | 1,770.88 mi (2,849.95 km) |
| Caernarfon to Silifke | 2,165.62 mi (3,485.23 km) |
| Caernarfon to Silivri | 1,720.75 mi (2,769.27 km) |
| Caernarfon to Silopi | 2,470.48 mi (3,975.85 km) |
| Caernarfon to Simav | 1,840.91 mi (2,962.67 km) |
| Caernarfon to Sinanpasa | 1,906.53 mi (3,068.26 km) |
| Caernarfon to Sindirgi | 1,801.82 mi (2,899.74 km) |
