| Niagara Falls to Ratingen | 3,836.18 mi (6,173.73 km) |
| Niagara Falls to Ratzeburg | 3,901.74 mi (6,279.25 km) |
| Niagara Falls to Raubling | 4,161.96 mi (6,698.02 km) |
| Niagara Falls to Rauenberg | 3,975.88 mi (6,398.56 km) |
| Niagara Falls to Raunheim | 3,940.27 mi (6,341.25 km) |
| Niagara Falls to Ravensburg | 4,064.07 mi (6,540.49 km) |
| Niagara Falls to Recke | 3,834.43 mi (6,170.92 km) |
| Niagara Falls to Recklinghausen | 3,838.82 mi (6,177.98 km) |
| Niagara Falls to Regen | 4,157.62 mi (6,691.04 km) |
| Niagara Falls to Regensburg | 4,115.59 mi (6,623.40 km) |
| Niagara Falls to Regenstauf | 4,113.39 mi (6,619.86 km) |
| Niagara Falls to Rehau | 4,068.15 mi (6,547.05 km) |
| Niagara Falls to Rehburg-Loccum | 3,887.09 mi (6,255.67 km) |
| Niagara Falls to Rehlingen-Siersburg | 3,893.11 mi (6,265.36 km) |
| Niagara Falls to Reichelsheim | 3,965.69 mi (6,382.16 km) |
