| Houston to Sangeorgiu de Mures | 5,966.80 mi (9,602.64 km) |
| Houston to Sangeorz-Bai | 5,937.14 mi (9,554.90 km) |
| Houston to Sannicolau Mare | 5,846.80 mi (9,409.51 km) |
| Houston to Santana | 5,867.53 mi (9,442.88 km) |
| Houston to Satu Mare | 5,854.86 mi (9,422.49 km) |
| Houston to Scobinti | 6,014.94 mi (9,680.11 km) |
| Houston to Scornicesti | 6,059.79 mi (9,752.29 km) |
| Houston to Sebes | 5,960.95 mi (9,593.22 km) |
| Houston to Seini | 5,870.80 mi (9,448.13 km) |
| Houston to Sfantu-Gheorghe | 6,045.52 mi (9,729.33 km) |
| Houston to Sibiu | 5,989.71 mi (9,639.51 km) |
| Houston to Sighetu Marmatiei | 5,884.17 mi (9,469.65 km) |
| Houston to Sighisoara | 5,993.59 mi (9,645.75 km) |
| Houston to Simeria | 5,945.32 mi (9,568.06 km) |
| Houston to Sinaia | 6,060.74 mi (9,753.81 km) |
