| Swansea to Castle Pines (Colorado) | 800.74 mi (1,288.66 km) |
| Swansea to Castle Rock (Colorado) | 799.87 mi (1,287.26 km) |
| Swansea to Castro Valley (California) | 1,735.46 mi (2,792.95 km) |
| Swansea to Catalina Foothills (Arizona) | 1,249.76 mi (2,011.30 km) |
| Swansea to Cataño (Puerto Rico) | 1,994.83 mi (3,210.38 km) |
| Swansea to Cathedral City (California) | 1,506.35 mi (2,424.24 km) |
| Swansea to Catonsville (Maryland) | 713.11 mi (1,147.63 km) |
| Swansea to Cave Spring (Virginia) | 551.49 mi (887.53 km) |
| Swansea to Cayce (South Carolina) | 590.77 mi (950.76 km) |
| Swansea to Cayey (Puerto Rico) | 2,010.92 mi (3,236.26 km) |
| Swansea to Cedar City (Utah) | 1,254.35 mi (2,018.69 km) |
| Swansea to Cedar Falls (Iowa) | 303.26 mi (488.05 km) |
| Swansea to Cedar Hill (Texas) | 568.61 mi (915.09 km) |
| Swansea to Cedar Lake (Indiana) | 236.89 mi (381.23 km) |
| Swansea to Cedar Mill (Oregon) | 1,738.02 mi (2,797.08 km) |
