| Houston to Sacile | 5,534.72 mi (8,907.27 km) |
| Houston to Sala Consilina | 5,880.59 mi (9,463.89 km) |
| Houston to Salemi | 5,859.34 mi (9,429.70 km) |
| Houston to Salerno | 5,833.38 mi (9,387.91 km) |
| Houston to Salo | 5,468.31 mi (8,800.39 km) |
| Houston to Salsomaggiore Terme | 5,473.88 mi (8,809.36 km) |
| Houston to Saluzzo | 5,374.95 mi (8,650.15 km) |
| Houston to Salzano | 5,535.49 mi (8,908.51 km) |
| Houston to Samarate | 5,395.39 mi (8,683.05 km) |
| Houston to San Benedetto del Tronto | 5,707.05 mi (9,184.61 km) |
| Houston to San Biagio di Callalta | 5,540.47 mi (8,916.53 km) |
| Houston to San Bonifacio | 5,506.42 mi (8,861.73 km) |
| Houston to San Casciano in Val di Pesa | 5,566.94 mi (8,959.13 km) |
| Houston to San Cataldo | 5,925.75 mi (9,536.57 km) |
| Houston to San Cesareo | 5,705.03 mi (9,181.37 km) |
