| Mack to Security-Widefield (Colorado) | 1,074.72 mi (1,729.60 km) |
| Mack to Sedalia (Missouri) | 460.66 mi (741.36 km) |
| Mack to Sedro-Woolley (Washington) | 1,957.43 mi (3,150.17 km) |
| Mack to Seguin (Texas) | 1,003.29 mi (1,614.64 km) |
| Mack to Selden (New York) | 626.51 mi (1,008.27 km) |
| Mack to Selma (Alabama) | 483.48 mi (778.08 km) |
| Mack to Selma (California) | 1,902.23 mi (3,061.34 km) |
| Mack to Selma (Texas) | 1,018.26 mi (1,638.72 km) |
| Mack to Seminole (Florida) | 788.69 mi (1,269.27 km) |
| Mack to Seven Hills (Ohio) | 221.05 mi (355.75 km) |
| Mack to Seven Oaks (South Carolina) | 403.30 mi (649.05 km) |
| Mack to Severn (Maryland) | 427.69 mi (688.31 km) |
| Mack to Severna Park (Maryland) | 434.66 mi (699.51 km) |
| Mack to Sevierville (Tennessee) | 233.46 mi (375.72 km) |
| Mack to Seymour (Indiana) | 66.49 mi (107.01 km) |
