| Letterkenny to Seysses | 888.78 mi (1,430.35 km) |
| Letterkenny to Sin-le-Noble | 552.98 mi (889.93 km) |
| Letterkenny to Six-Fours-les-Plages | 1,019.60 mi (1,640.89 km) |
| Letterkenny to Soissons | 604.94 mi (973.55 km) |
| Letterkenny to Soisy-sous-Montmorency | 592.21 mi (953.08 km) |
| Letterkenny to Sollies-Pont | 1,020.32 mi (1,642.04 km) |
| Letterkenny to Somain | 558.95 mi (899.54 km) |
| Letterkenny to Sorgues | 941.30 mi (1,514.87 km) |
| Letterkenny to Sotteville-les-Rouen | 534.22 mi (859.75 km) |
| Letterkenny to Soyaux | 731.38 mi (1,177.04 km) |
| Letterkenny to Stains | 596.69 mi (960.29 km) |
| Letterkenny to Stiring-Wendel | 736.16 mi (1,184.73 km) |
| Letterkenny to Strasbourg | 791.79 mi (1,274.26 km) |
| Letterkenny to Sucy-en-Brie | 610.20 mi (982.02 km) |
| Letterkenny to Suresnes | 595.88 mi (958.97 km) |
