| Flensburg to Roeselare | 373.41 mi (600.95 km) |
| Flensburg to Ronse | 370.08 mi (595.59 km) |
| Flensburg to Rotselaar | 329.86 mi (530.86 km) |
| Flensburg to Rumst | 330.00 mi (531.08 km) |
| Flensburg to Saint-Ghislain | 380.76 mi (612.77 km) |
| Flensburg to Saint-Nicolas | 329.83 mi (530.80 km) |
| Flensburg to Saint-Vith | 340.33 mi (547.71 km) |
| Flensburg to Scherpenheuvel | 320.06 mi (515.09 km) |
| Flensburg to Schilde | 317.82 mi (511.48 km) |
| Flensburg to Schoten | 318.68 mi (512.87 km) |
| Flensburg to Seneffe | 365.06 mi (587.51 km) |
| Flensburg to Seraing | 333.56 mi (536.82 km) |
| Flensburg to Sint-Amandsberg | 349.77 mi (562.89 km) |
| Flensburg to Sint-Andries | 358.76 mi (577.37 km) |
| Flensburg to Sint-Genesius-Rode | 350.65 mi (564.32 km) |
