| Flensburg to Settimo Torinese | 670.72 mi (1,079.42 km) |
| Flensburg to Seveso | 631.55 mi (1,016.38 km) |
| Flensburg to Sezze | 932.50 mi (1,500.72 km) |
| Flensburg to Siano | 995.54 mi (1,602.16 km) |
| Flensburg to Siena | 796.61 mi (1,282.03 km) |
| Flensburg to Signa | 763.56 mi (1,228.83 km) |
| Flensburg to Silea | 643.04 mi (1,034.87 km) |
| Flensburg to Silvi Paese | 871.21 mi (1,402.08 km) |
| Flensburg to Sinalunga | 805.72 mi (1,296.68 km) |
| Flensburg to Siniscola | 981.72 mi (1,579.93 km) |
| Flensburg to Sinnai | 1,069.57 mi (1,721.31 km) |
| Flensburg to Siracusa | 1,254.64 mi (2,019.15 km) |
| Flensburg to Solaro | 633.56 mi (1,019.62 km) |
| Flensburg to Soliera | 697.09 mi (1,121.85 km) |
| Flensburg to Solofra | 995.21 mi (1,601.64 km) |
