| Didcot to Cloverly (Maryland) | 3,606.58 mi (5,804.23 km) |
| Didcot to Clovis (California) | 5,287.33 mi (8,509.14 km) |
| Didcot to Clovis (New Mexico) | 4,857.02 mi (7,816.62 km) |
| Didcot to Clute (Texas) | 4,841.17 mi (7,791.11 km) |
| Didcot to Coachella (California) | 5,351.78 mi (8,612.86 km) |
| Didcot to Coalinga (California) | 5,346.53 mi (8,604.42 km) |
| Didcot to Coamo (Puerto Rico) | 4,184.07 mi (6,733.60 km) |
| Didcot to Coatesville (Pennsylvania) | 3,519.43 mi (5,663.97 km) |
| Didcot to Cockeysville (Maryland) | 3,574.78 mi (5,753.06 km) |
| Didcot to Cocoa (Florida) | 4,272.96 mi (6,876.66 km) |
| Didcot to Cocoa Beach (Florida) | 4,269.51 mi (6,871.11 km) |
| Didcot to Coconut Creek (Florida) | 4,353.65 mi (7,006.52 km) |
| Didcot to Coeur d'Alene (Idaho) | 4,591.68 mi (7,389.60 km) |
| Didcot to Cohoes (New York) | 3,314.03 mi (5,333.41 km) |
| Didcot to Cold Springs (Nevada) | 5,132.82 mi (8,260.48 km) |
