| Merthyr Tudful to Camas (Washington) | 4,800.06 mi (7,724.95 km) |
| Merthyr Tudful to Cambridge (Maryland) | 3,503.08 mi (5,637.67 km) |
| Merthyr Tudful to Cambridge (Massachusetts) | 3,134.81 mi (5,044.99 km) |
| Merthyr Tudful to Camden (Arkansas) | 4,419.40 mi (7,112.33 km) |
| Merthyr Tudful to Camden (New Jersey) | 3,402.03 mi (5,475.04 km) |
| Merthyr Tudful to Cameron Park (California) | 5,149.85 mi (8,287.88 km) |
| Merthyr Tudful to Camp Pendleton South (California) | 5,342.05 mi (8,597.20 km) |
| Merthyr Tudful to Camp Springs (Maryland) | 3,526.43 mi (5,675.24 km) |
| Merthyr Tudful to Camp Verde (Arizona) | 5,078.64 mi (8,173.28 km) |
| Merthyr Tudful to Campbell (California) | 5,259.05 mi (8,463.62 km) |
| Merthyr Tudful to Campbellsville (Kentucky) | 3,936.28 mi (6,334.84 km) |
| Merthyr Tudful to Campton Hills (Illinois) | 3,842.65 mi (6,184.16 km) |
| Merthyr Tudful to Canby (Oregon) | 4,826.16 mi (7,766.95 km) |
| Merthyr Tudful to Candelaria (Puerto Rico) | 4,071.56 mi (6,552.54 km) |
| Merthyr Tudful to Candler-McAfee (Georgia) | 4,065.17 mi (6,542.26 km) |
