| Pontneddfechan to Security-Widefield (Colorado) | 4,596.17 mi (7,396.81 km) |
| Pontneddfechan to Sedalia (Missouri) | 4,172.53 mi (6,715.04 km) |
| Pontneddfechan to Sedro-Woolley (Washington) | 4,624.95 mi (7,443.14 km) |
| Pontneddfechan to Seguin (Texas) | 4,816.83 mi (7,751.94 km) |
| Pontneddfechan to Selden (New York) | 3,268.09 mi (5,259.47 km) |
| Pontneddfechan to Selma (Alabama) | 4,233.43 mi (6,813.05 km) |
| Pontneddfechan to Selma (California) | 5,218.89 mi (8,398.99 km) |
| Pontneddfechan to Selma (Texas) | 4,830.61 mi (7,774.12 km) |
| Pontneddfechan to Seminole (Florida) | 4,284.04 mi (6,894.49 km) |
| Pontneddfechan to Seven Hills (Ohio) | 3,595.85 mi (5,786.96 km) |
| Pontneddfechan to Seven Oaks (South Carolina) | 3,911.81 mi (6,295.46 km) |
| Pontneddfechan to Severn (Maryland) | 3,493.66 mi (5,622.49 km) |
| Pontneddfechan to Severna Park (Maryland) | 3,490.59 mi (5,617.56 km) |
| Pontneddfechan to Sevierville (Tennessee) | 3,924.14 mi (6,315.29 km) |
| Pontneddfechan to Seymour (Indiana) | 3,874.10 mi (6,234.77 km) |
