| Niagara Falls to Rodgau | 3,956.98 mi (6,368.14 km) |
| Niagara Falls to Roding | 4,125.43 mi (6,639.23 km) |
| Niagara Falls to Rodinghausen | 3,866.61 mi (6,222.70 km) |
| Niagara Falls to Roetgen | 3,832.23 mi (6,167.38 km) |
| Niagara Falls to Rommerskirchen | 3,838.70 mi (6,177.79 km) |
| Niagara Falls to Ronnenberg | 3,908.02 mi (6,289.35 km) |
| Niagara Falls to Rosbach vor der Hohe | 3,940.30 mi (6,341.30 km) |
| Niagara Falls to Rosdorf | 3,944.79 mi (6,348.53 km) |
| Niagara Falls to Rosenheim | 4,160.76 mi (6,696.09 km) |
| Niagara Falls to Rosrath | 3,861.96 mi (6,215.23 km) |
| Niagara Falls to Rossdorf | 3,957.50 mi (6,368.98 km) |
| Niagara Falls to Rosstal | 4,055.59 mi (6,526.84 km) |
| Niagara Falls to Rostock | 3,938.03 mi (6,337.65 km) |
| Niagara Falls to Rotenburg an der Fulda | 3,955.55 mi (6,365.85 km) |
| Niagara Falls to Roth | 4,069.11 mi (6,548.61 km) |
