| Seaham to Castle Rock (Colorado) | 4,525.83 mi (7,283.62 km) |
| Seaham to Castro Valley (California) | 5,147.18 mi (8,283.59 km) |
| Seaham to Catalina Foothills (Arizona) | 5,119.28 mi (8,238.68 km) |
| Seaham to Cataño (Puerto Rico) | 4,186.00 mi (6,736.72 km) |
| Seaham to Cathedral City (California) | 5,209.36 mi (8,383.65 km) |
| Seaham to Catonsville (Maryland) | 3,521.34 mi (5,667.05 km) |
| Seaham to Cave Spring (Virginia) | 3,746.20 mi (6,028.92 km) |
| Seaham to Cayce (South Carolina) | 3,951.14 mi (6,358.75 km) |
| Seaham to Cayey (Puerto Rico) | 4,204.62 mi (6,766.67 km) |
| Seaham to Cedar City (Utah) | 4,883.50 mi (7,859.24 km) |
| Seaham to Cedar Falls (Iowa) | 3,940.00 mi (6,340.81 km) |
| Seaham to Cedar Hill (Texas) | 4,620.65 mi (7,436.22 km) |
| Seaham to Cedar Lake (Indiana) | 3,818.69 mi (6,145.59 km) |
| Seaham to Cedar Mill (Oregon) | 4,705.43 mi (7,572.66 km) |
| Seaham to Cedar Park (Texas) | 4,764.43 mi (7,667.61 km) |
