| Niederkassel to Ardea | 687.72 mi (1,106.77 km) |
| Niederkassel to Arenzano | 449.62 mi (723.60 km) |
| Niederkassel to Arese | 375.72 mi (604.66 km) |
| Niederkassel to Arezzo | 556.46 mi (895.54 km) |
| Niederkassel to Argelato | 475.41 mi (765.10 km) |
| Niederkassel to Argenta | 482.84 mi (777.06 km) |
| Niederkassel to Ariano Irpino | 770.57 mi (1,240.12 km) |
| Niederkassel to Ariccia | 683.41 mi (1,099.84 km) |
| Niederkassel to Arluno | 377.61 mi (607.70 km) |
| Niederkassel to Arona | 356.55 mi (573.82 km) |
| Niederkassel to Artena | 687.09 mi (1,105.76 km) |
| Niederkassel to Arzachena | 681.83 mi (1,097.29 km) |
| Niederkassel to Arzano | 766.59 mi (1,233.70 km) |
| Niederkassel to Arzignano | 416.20 mi (669.81 km) |
| Niederkassel to Ascoli Piceno | 630.96 mi (1,015.43 km) |
