| Castricum to Security-Widefield (Colorado) | 4,847.03 mi (7,800.54 km) |
| Castricum to Sedalia (Missouri) | 4,453.46 mi (7,167.15 km) |
| Castricum to Sedro-Woolley (Washington) | 4,790.91 mi (7,710.22 km) |
| Castricum to Seguin (Texas) | 5,109.99 mi (8,223.73 km) |
| Castricum to Selden (New York) | 3,584.42 mi (5,768.57 km) |
| Castricum to Selma (Alabama) | 4,544.50 mi (7,313.66 km) |
| Castricum to Selma (California) | 5,429.54 mi (8,738.00 km) |
| Castricum to Selma (Texas) | 5,122.93 mi (8,244.56 km) |
| Castricum to Seminole (Florida) | 4,612.14 mi (7,422.53 km) |
| Castricum to Seven Hills (Ohio) | 3,894.33 mi (6,267.32 km) |
| Castricum to Seven Oaks (South Carolina) | 4,230.60 mi (6,808.50 km) |
| Castricum to Severn (Maryland) | 3,808.22 mi (6,128.74 km) |
| Castricum to Severna Park (Maryland) | 3,805.52 mi (6,124.39 km) |
| Castricum to Sevierville (Tennessee) | 4,233.96 mi (6,813.91 km) |
| Castricum to Seymour (Indiana) | 4,170.97 mi (6,712.53 km) |
