| Mountain Ash to Seysses | 605.89 mi (975.08 km) |
| Mountain Ash to Sin-le-Noble | 296.38 mi (476.98 km) |
| Mountain Ash to Six-Fours-les-Plages | 731.33 mi (1,176.96 km) |
| Mountain Ash to Soissons | 334.34 mi (538.08 km) |
| Mountain Ash to Soisy-sous-Montmorency | 311.88 mi (501.93 km) |
| Mountain Ash to Sollies-Pont | 732.25 mi (1,178.45 km) |
| Mountain Ash to Somain | 303.43 mi (488.32 km) |
| Mountain Ash to Sorgues | 652.94 mi (1,050.80 km) |
| Mountain Ash to Sotteville-les-Rouen | 251.22 mi (404.30 km) |
| Mountain Ash to Soyaux | 448.05 mi (721.06 km) |
| Mountain Ash to Stains | 316.48 mi (509.32 km) |
| Mountain Ash to Stiring-Wendel | 484.41 mi (779.58 km) |
| Mountain Ash to Strasbourg | 536.50 mi (863.42 km) |
| Mountain Ash to Sucy-en-Brie | 329.28 mi (529.92 km) |
| Mountain Ash to Suresnes | 314.27 mi (505.78 km) |
