| Didcot to Castle Rock (Colorado) | 4,657.14 mi (7,494.95 km) |
| Didcot to Castro Valley (California) | 5,309.27 mi (8,544.44 km) |
| Didcot to Catalina Foothills (Arizona) | 5,249.16 mi (8,447.70 km) |
| Didcot to Cataño (Puerto Rico) | 4,155.72 mi (6,687.99 km) |
| Didcot to Cathedral City (California) | 5,354.19 mi (8,616.73 km) |
| Didcot to Catonsville (Maryland) | 3,589.01 mi (5,775.95 km) |
| Didcot to Cave Spring (Virginia) | 3,815.09 mi (6,139.79 km) |
| Didcot to Cayce (South Carolina) | 4,012.27 mi (6,457.12 km) |
| Didcot to Cayey (Puerto Rico) | 4,173.51 mi (6,716.61 km) |
| Didcot to Cedar City (Utah) | 5,028.19 mi (8,092.09 km) |
| Didcot to Cedar Falls (Iowa) | 4,053.51 mi (6,523.49 km) |
| Didcot to Cedar Hill (Texas) | 4,718.40 mi (7,593.52 km) |
| Didcot to Cedar Lake (Indiana) | 3,918.16 mi (6,305.66 km) |
| Didcot to Cedar Mill (Oregon) | 4,880.07 mi (7,853.71 km) |
| Didcot to Cedar Park (Texas) | 4,859.30 mi (7,820.29 km) |
