| Castlebar to Seysses | 862.26 mi (1,387.67 km) |
| Castlebar to Sin-le-Noble | 578.43 mi (930.89 km) |
| Castlebar to Six-Fours-les-Plages | 1,011.83 mi (1,628.38 km) |
| Castlebar to Soissons | 622.39 mi (1,001.64 km) |
| Castlebar to Soisy-sous-Montmorency | 601.40 mi (967.85 km) |
| Castlebar to Sollies-Pont | 1,013.78 mi (1,631.53 km) |
| Castlebar to Somain | 585.04 mi (941.54 km) |
| Castlebar to Sorgues | 933.21 mi (1,501.86 km) |
| Castlebar to Sotteville-les-Rouen | 540.53 mi (869.90 km) |
| Castlebar to Soyaux | 707.46 mi (1,138.54 km) |
| Castlebar to Stains | 605.99 mi (975.25 km) |
| Castlebar to Stiring-Wendel | 765.97 mi (1,232.71 km) |
| Castlebar to Strasbourg | 819.98 mi (1,319.63 km) |
| Castlebar to Sucy-en-Brie | 618.74 mi (995.76 km) |
| Castlebar to Suresnes | 603.68 mi (971.52 km) |
