| Niederkassel to Ribnica | 497.82 mi (801.16 km) |
| Niederkassel to Ribnica | 477.80 mi (768.95 km) |
| Niederkassel to Rogaska Slatina | 504.83 mi (812.45 km) |
| Niederkassel to Rogasovci | 493.99 mi (795.00 km) |
| Niederkassel to Rogatec | 507.55 mi (816.82 km) |
| Niederkassel to Ruse | 486.44 mi (782.85 km) |
| Niederkassel to Salovci | 503.12 mi (809.70 km) |
| Niederkassel to Selnica ob Dravi | 485.12 mi (780.72 km) |
| Niederkassel to Semic | 516.85 mi (831.79 km) |
| Niederkassel to Sempeter pri Gorici | 453.47 mi (729.79 km) |
| Niederkassel to Sencur | 462.23 mi (743.88 km) |
| Niederkassel to Sentilj | 484.94 mi (780.43 km) |
| Niederkassel to Sentjernej | 513.02 mi (825.62 km) |
| Niederkassel to Sentjur | 496.93 mi (799.73 km) |
| Niederkassel to Sentrupert | 497.90 mi (801.29 km) |
