| Flensburg to Rheinberg | 252.47 mi (406.32 km) |
| Flensburg to Rheine | 191.22 mi (307.74 km) |
| Flensburg to Rheinfelden (Baden) | 503.93 mi (811.00 km) |
| Flensburg to Ribnitz-Damgarten | 126.95 mi (204.30 km) |
| Flensburg to Richterich | 308.52 mi (496.52 km) |
| Flensburg to Riedlingen | 457.86 mi (736.85 km) |
| Flensburg to Riegelsberg | 393.69 mi (633.59 km) |
| Flensburg to Rielasingen-Worblingen | 487.59 mi (784.70 km) |
| Flensburg to Riesa | 288.48 mi (464.27 km) |
| Flensburg to Rietberg | 210.15 mi (338.20 km) |
| Flensburg to Rinteln | 179.64 mi (289.10 km) |
| Flensburg to Ritterhude | 113.65 mi (182.91 km) |
| Flensburg to Rodenbach | 320.48 mi (515.77 km) |
| Flensburg to Rodental | 318.26 mi (512.19 km) |
| Flensburg to Rodgau | 330.07 mi (531.19 km) |
