| Niagara Falls to Sangeorgiu de Mures | 4,680.06 mi (7,531.82 km) |
| Niagara Falls to Sangeorz-Bai | 4,651.51 mi (7,485.88 km) |
| Niagara Falls to Sannicolau Mare | 4,558.05 mi (7,335.48 km) |
| Niagara Falls to Santana | 4,579.20 mi (7,369.50 km) |
| Niagara Falls to Satu Mare | 4,568.50 mi (7,352.30 km) |
| Niagara Falls to Scobinti | 4,731.24 mi (7,614.19 km) |
| Niagara Falls to Scornicesti | 4,771.45 mi (7,678.91 km) |
| Niagara Falls to Sebes | 4,673.17 mi (7,520.74 km) |
| Niagara Falls to Seini | 4,584.65 mi (7,378.28 km) |
| Niagara Falls to Sfantu-Gheorghe | 4,758.89 mi (7,658.70 km) |
| Niagara Falls to Sibiu | 4,702.08 mi (7,567.26 km) |
| Niagara Falls to Sighetu Marmatiei | 4,598.68 mi (7,400.86 km) |
| Niagara Falls to Sighisoara | 4,706.70 mi (7,574.70 km) |
| Niagara Falls to Simeria | 4,657.21 mi (7,495.06 km) |
| Niagara Falls to Sinaia | 4,773.45 mi (7,682.13 km) |
