| Didcot to Camas (Washington) | 4,866.29 mi (7,831.53 km) |
| Didcot to Cambridge (Maryland) | 3,593.71 mi (5,783.52 km) |
| Didcot to Cambridge (Massachusetts) | 3,225.19 mi (5,190.43 km) |
| Didcot to Camden (Arkansas) | 4,507.51 mi (7,254.13 km) |
| Didcot to Camden (New Jersey) | 3,492.44 mi (5,620.54 km) |
| Didcot to Cameron Park (California) | 5,221.43 mi (8,403.09 km) |
| Didcot to Camp Pendleton South (California) | 5,418.98 mi (8,721.01 km) |
| Didcot to Camp Springs (Maryland) | 3,616.83 mi (5,820.72 km) |
| Didcot to Camp Verde (Arizona) | 5,158.11 mi (8,301.18 km) |
| Didcot to Campbell (California) | 5,330.78 mi (8,579.07 km) |
| Didcot to Campbellsville (Kentucky) | 4,025.22 mi (6,477.96 km) |
| Didcot to Campton Hills (Illinois) | 3,928.64 mi (6,322.54 km) |
| Didcot to Canby (Oregon) | 4,892.43 mi (7,873.61 km) |
| Didcot to Candelaria (Puerto Rico) | 4,160.60 mi (6,695.83 km) |
| Didcot to Candler-McAfee (Georgia) | 4,155.47 mi (6,687.59 km) |
