| Boise to Security-Widefield (Colorado) | 685.47 mi (1,103.16 km) |
| Boise to Sedalia (Missouri) | 1,238.73 mi (1,993.55 km) |
| Boise to Sedro-Woolley (Washington) | 444.60 mi (715.51 km) |
| Boise to Seguin (Texas) | 1,395.30 mi (2,245.52 km) |
| Boise to Selden (New York) | 2,192.21 mi (3,528.01 km) |
| Boise to Selma (Alabama) | 1,754.94 mi (2,824.30 km) |
| Boise to Selma (California) | 517.42 mi (832.71 km) |
| Boise to Selma (Texas) | 1,381.84 mi (2,223.86 km) |
| Boise to Seminole (Florida) | 2,147.92 mi (3,456.74 km) |
| Boise to Seven Hills (Ohio) | 1,754.58 mi (2,823.73 km) |
| Boise to Seven Oaks (South Carolina) | 1,983.41 mi (3,191.98 km) |
| Boise to Severn (Maryland) | 2,053.39 mi (3,304.61 km) |
| Boise to Severna Park (Maryland) | 2,060.95 mi (3,316.78 km) |
| Boise to Sevierville (Tennessee) | 1,802.04 mi (2,900.11 km) |
| Boise to Seymour (Indiana) | 1,598.57 mi (2,572.65 km) |
