| Holyhead to Seysses | 730.05 mi (1,174.90 km) |
| Holyhead to Sin-le-Noble | 388.01 mi (624.45 km) |
| Holyhead to Six-Fours-les-Plages | 851.99 mi (1,371.14 km) |
| Holyhead to Soissons | 437.23 mi (703.65 km) |
| Holyhead to Soisy-sous-Montmorency | 423.23 mi (681.12 km) |
| Holyhead to Sollies-Pont | 852.42 mi (1,371.83 km) |
| Holyhead to Somain | 394.31 mi (634.59 km) |
| Holyhead to Sorgues | 773.88 mi (1,245.45 km) |
| Holyhead to Sotteville-les-Rouen | 365.25 mi (587.81 km) |
| Holyhead to Soyaux | 572.20 mi (920.86 km) |
| Holyhead to Stains | 427.72 mi (688.35 km) |
| Holyhead to Stiring-Wendel | 573.99 mi (923.74 km) |
| Holyhead to Strasbourg | 628.81 mi (1,011.97 km) |
| Holyhead to Sucy-en-Brie | 441.20 mi (710.04 km) |
| Holyhead to Suresnes | 426.86 mi (686.96 km) |
