| Middle River to Security-Widefield (Colorado) | 1,512.33 mi (2,433.86 km) |
| Middle River to Sedalia (Missouri) | 902.01 mi (1,451.65 km) |
| Middle River to Sedro-Woolley (Washington) | 2,327.89 mi (3,746.38 km) |
| Middle River to Seguin (Texas) | 1,394.85 mi (2,244.79 km) |
| Middle River to Selden (New York) | 207.39 mi (333.77 km) |
| Middle River to Selma (Alabama) | 761.78 mi (1,225.97 km) |
| Middle River to Selma (California) | 2,338.26 mi (3,763.07 km) |
| Middle River to Selma (Texas) | 1,412.06 mi (2,272.49 km) |
| Middle River to Seminole (Florida) | 874.18 mi (1,406.86 km) |
| Middle River to Seven Hills (Ohio) | 310.00 mi (498.90 km) |
| Middle River to Seven Oaks (South Carolina) | 449.54 mi (723.46 km) |
| Middle River to Severn (Maryland) | 20.40 mi (32.82 km) |
| Middle River to Severna Park (Maryland) | 19.32 mi (31.09 km) |
| Middle River to Sevierville (Tennessee) | 457.87 mi (736.87 km) |
| Middle River to Seymour (Indiana) | 507.73 mi (817.11 km) |
