| Kilkis to Santander | 1,369.45 mi (2,203.91 km) |
| Kilkis to Santany | 1,045.94 mi (1,683.28 km) |
| Kilkis to Santiago de Compostela | 1,610.51 mi (2,591.87 km) |
| Kilkis to Santiago del Teide | 2,395.47 mi (3,855.14 km) |
| Kilkis to Santiponce | 1,559.72 mi (2,510.13 km) |
| Kilkis to Santomera | 1,286.37 mi (2,070.22 km) |
| Kilkis to Santona | 1,352.08 mi (2,175.96 km) |
| Kilkis to Santurce-Antiguo | 1,330.95 mi (2,141.95 km) |
| Kilkis to Sarria | 1,554.36 mi (2,501.50 km) |
| Kilkis to Sauzal | 2,369.20 mi (3,812.86 km) |
| Kilkis to Sedavi | 1,228.03 mi (1,976.32 km) |
| Kilkis to Segorbe | 1,227.44 mi (1,975.38 km) |
| Kilkis to Segovia | 1,402.22 mi (2,256.65 km) |
| Kilkis to Senmanat | 1,074.43 mi (1,729.13 km) |
| Kilkis to Sesena | 1,390.73 mi (2,238.16 km) |
