| Niagara Falls to Quarteira | 3,659.29 mi (5,889.05 km) |
| Niagara Falls to Queluz | 3,546.94 mi (5,708.25 km) |
| Niagara Falls to Reguengos de Monsaraz | 3,639.99 mi (5,858.00 km) |
| Niagara Falls to Resende | 3,531.31 mi (5,683.10 km) |
| Niagara Falls to Ribeira Brava | 3,376.44 mi (5,433.86 km) |
| Niagara Falls to Ribeira Grande | 2,788.31 mi (4,487.34 km) |
| Niagara Falls to Rio de Mouro | 3,543.23 mi (5,702.28 km) |
| Niagara Falls to Rio Maior | 3,543.46 mi (5,702.64 km) |
| Niagara Falls to Rio Tinto | 3,501.48 mi (5,635.08 km) |
| Niagara Falls to Sabugal | 3,596.50 mi (5,788.01 km) |
| Niagara Falls to Sacavem | 3,553.13 mi (5,718.21 km) |
| Niagara Falls to Salvaterra de Magos | 3,560.95 mi (5,730.80 km) |
| Niagara Falls to Santa Comba Dao | 3,546.89 mi (5,708.17 km) |
| Niagara Falls to Santa Cruz | 3,388.88 mi (5,453.88 km) |
| Niagara Falls to Santa Iria da Azoia | 3,552.22 mi (5,716.75 km) |
