| Herndon to Security-Widefield (Colorado) | 1,464.80 mi (2,357.37 km) |
| Herndon to Sedalia (Missouri) | 852.00 mi (1,371.15 km) |
| Herndon to Sedro-Woolley (Washington) | 2,297.32 mi (3,697.18 km) |
| Herndon to Seguin (Texas) | 1,337.38 mi (2,152.30 km) |
| Herndon to Selden (New York) | 264.82 mi (426.18 km) |
| Herndon to Selma (Alabama) | 704.99 mi (1,134.56 km) |
| Herndon to Selma (California) | 2,291.62 mi (3,688.00 km) |
| Herndon to Selma (Texas) | 1,354.63 mi (2,180.06 km) |
| Herndon to Seminole (Florida) | 828.96 mi (1,334.08 km) |
| Herndon to Seven Hills (Ohio) | 280.93 mi (452.11 km) |
| Herndon to Seven Oaks (South Carolina) | 398.90 mi (641.97 km) |
| Herndon to Severn (Maryland) | 38.81 mi (62.45 km) |
| Herndon to Severna Park (Maryland) | 44.64 mi (71.85 km) |
| Herndon to Sevierville (Tennessee) | 400.33 mi (644.27 km) |
| Herndon to Seymour (Indiana) | 456.75 mi (735.07 km) |
