| Waltham Cross to Sesena | 819.17 mi (1,318.32 km) |
| Waltham Cross to Sestao | 594.94 mi (957.46 km) |
| Waltham Cross to Sevilla | 1,039.57 mi (1,673.03 km) |
| Waltham Cross to Sevilla La Nueva | 806.21 mi (1,297.47 km) |
| Waltham Cross to Silla | 851.71 mi (1,370.70 km) |
| Waltham Cross to Silleda | 729.53 mi (1,174.06 km) |
| Waltham Cross to Sitges | 727.38 mi (1,170.61 km) |
| Waltham Cross to Socuellamos | 866.47 mi (1,394.44 km) |
| Waltham Cross to Soller | 833.87 mi (1,341.98 km) |
| Waltham Cross to Solsona | 673.58 mi (1,084.03 km) |
| Waltham Cross to Son Servera | 849.33 mi (1,366.87 km) |
| Waltham Cross to Sonseca | 849.13 mi (1,366.54 km) |
| Waltham Cross to Sopelana | 589.89 mi (949.34 km) |
| Waltham Cross to Soria | 694.88 mi (1,118.29 km) |
| Waltham Cross to Suances | 599.94 mi (965.51 km) |
