| Boppard to Security-Widefield (Colorado) | 5,046.40 mi (8,121.39 km) |
| Boppard to Sedalia (Missouri) | 4,645.74 mi (7,476.60 km) |
| Boppard to Sedro-Woolley (Washington) | 4,994.01 mi (8,037.08 km) |
| Boppard to Seguin (Texas) | 5,298.31 mi (8,526.81 km) |
| Boppard to Selden (New York) | 3,760.94 mi (6,052.64 km) |
| Boppard to Selma (Alabama) | 4,724.36 mi (7,603.12 km) |
| Boppard to Selma (California) | 5,633.04 mi (9,065.49 km) |
| Boppard to Selma (Texas) | 5,311.58 mi (8,548.16 km) |
| Boppard to Seminole (Florida) | 4,780.45 mi (7,693.40 km) |
| Boppard to Seven Hills (Ohio) | 4,080.05 mi (6,566.20 km) |
| Boppard to Seven Oaks (South Carolina) | 4,405.75 mi (7,090.37 km) |
| Boppard to Severn (Maryland) | 3,985.87 mi (6,414.64 km) |
| Boppard to Severna Park (Maryland) | 3,982.95 mi (6,409.94 km) |
| Boppard to Sevierville (Tennessee) | 4,414.41 mi (7,104.30 km) |
| Boppard to Seymour (Indiana) | 4,357.47 mi (7,012.68 km) |
