| Caerfyrddin to Seysses | 633.60 mi (1,019.68 km) |
| Caerfyrddin to Sin-le-Noble | 338.19 mi (544.27 km) |
| Caerfyrddin to Six-Fours-les-Plages | 766.59 mi (1,233.70 km) |
| Caerfyrddin to Soissons | 375.76 mi (604.72 km) |
| Caerfyrddin to Soisy-sous-Montmorency | 352.05 mi (566.57 km) |
| Caerfyrddin to Sollies-Pont | 767.89 mi (1,235.80 km) |
| Caerfyrddin to Somain | 345.23 mi (555.60 km) |
| Caerfyrddin to Sorgues | 688.04 mi (1,107.30 km) |
| Caerfyrddin to Sotteville-les-Rouen | 290.93 mi (468.21 km) |
| Caerfyrddin to Soyaux | 475.93 mi (765.94 km) |
| Caerfyrddin to Stains | 356.65 mi (573.97 km) |
| Caerfyrddin to Stiring-Wendel | 526.24 mi (846.90 km) |
| Caerfyrddin to Strasbourg | 578.31 mi (930.70 km) |
| Caerfyrddin to Sucy-en-Brie | 369.24 mi (594.24 km) |
| Caerfyrddin to Suresnes | 354.12 mi (569.90 km) |
