| Didcot to Cicero (Illinois) | 3,908.45 mi (6,290.04 km) |
| Didcot to Cimarron Hills (Colorado) | 4,678.78 mi (7,529.76 km) |
| Didcot to Cincinnati (Ohio) | 3,907.14 mi (6,287.93 km) |
| Didcot to Cinco Ranch (Texas) | 4,818.51 mi (7,754.64 km) |
| Didcot to Circleville (Ohio) | 3,823.22 mi (6,152.88 km) |
| Didcot to Citrus (California) | 5,384.99 mi (8,666.30 km) |
| Didcot to Citrus Heights (California) | 5,229.25 mi (8,415.66 km) |
| Didcot to Citrus Park (Florida) | 4,363.86 mi (7,022.95 km) |
| Didcot to Claiborne (Louisiana) | 4,533.82 mi (7,296.49 km) |
| Didcot to Claremont (California) | 5,378.78 mi (8,656.31 km) |
| Didcot to Claremont (New Hampshire) | 3,233.54 mi (5,203.88 km) |
| Didcot to Claremore (Oklahoma) | 4,476.12 mi (7,203.61 km) |
| Didcot to Clarksburg (Maryland) | 3,612.16 mi (5,813.21 km) |
| Didcot to Clarksburg (West Virginia) | 3,733.33 mi (6,008.22 km) |
| Didcot to Clarksdale (Mississippi) | 4,386.16 mi (7,058.84 km) |
