| Watford to Srbobran | 1,010.12 mi (1,625.63 km) |
| Watford to Sremska Kamenica | 1,024.02 mi (1,648.00 km) |
| Watford to Sremska Mitrovica | 1,024.34 mi (1,648.51 km) |
| Watford to Sremski Karlovci | 1,028.63 mi (1,655.43 km) |
| Watford to Stara Pazova | 1,046.36 mi (1,683.96 km) |
| Watford to Subotica | 985.02 mi (1,585.24 km) |
| Watford to Surcin | 1,058.14 mi (1,702.91 km) |
| Watford to Surdulica | 1,219.89 mi (1,963.22 km) |
| Watford to Svilajnac | 1,118.19 mi (1,799.55 km) |
| Watford to Svrljig | 1,187.57 mi (1,911.21 km) |
| Watford to Temerin | 1,018.51 mi (1,639.13 km) |
| Watford to Titel | 1,043.46 mi (1,679.28 km) |
| Watford to Topola | 1,095.55 mi (1,763.12 km) |
| Watford to Trgoviste | 1,231.76 mi (1,982.33 km) |
| Watford to Trstenik | 1,134.24 mi (1,825.39 km) |
