| Niagara Falls to Redondela | 3,464.48 mi (5,575.54 km) |
| Niagara Falls to Reinosa | 3,644.78 mi (5,865.71 km) |
| Niagara Falls to Requena | 3,901.39 mi (6,278.68 km) |
| Niagara Falls to Reus | 3,941.78 mi (6,343.68 km) |
| Niagara Falls to Rianxo | 3,444.16 mi (5,542.84 km) |
| Niagara Falls to Ribadeo | 3,497.92 mi (5,629.36 km) |
| Niagara Falls to Rincon de la Victoria | 3,852.95 mi (6,200.73 km) |
| Niagara Falls to Ripoll | 3,952.53 mi (6,360.98 km) |
| Niagara Falls to Ripollet | 3,976.17 mi (6,399.02 km) |
| Niagara Falls to Rojales | 3,969.22 mi (6,387.84 km) |
| Niagara Falls to Ronda | 3,810.56 mi (6,132.50 km) |
| Niagara Falls to Roquetas de Mar | 3,929.74 mi (6,324.30 km) |
| Niagara Falls to Rosas | 3,993.47 mi (6,426.87 km) |
| Niagara Falls to Rubi | 3,970.77 mi (6,390.33 km) |
| Niagara Falls to Rute | 3,827.44 mi (6,159.68 km) |
