| Didcot to Caguas (Puerto Rico) | 4,162.07 mi (6,698.21 km) |
| Didcot to Cahokia (Illinois) | 4,156.58 mi (6,689.38 km) |
| Didcot to Calabasas (California) | 5,408.98 mi (8,704.91 km) |
| Didcot to Caldwell (Idaho) | 4,811.13 mi (7,742.77 km) |
| Didcot to Caledonia (Wisconsin) | 3,868.95 mi (6,226.47 km) |
| Didcot to Calera (Alabama) | 4,285.56 mi (6,896.94 km) |
| Didcot to Calexico (California) | 5,386.80 mi (8,669.22 km) |
| Didcot to Calhoun (Georgia) | 4,145.52 mi (6,671.57 km) |
| Didcot to California (Maryland) | 3,622.27 mi (5,829.47 km) |
| Didcot to California City (California) | 5,325.23 mi (8,570.13 km) |
| Didcot to Callaway (Florida) | 4,385.31 mi (7,057.47 km) |
| Didcot to Calumet City (Illinois) | 3,911.15 mi (6,294.38 km) |
| Didcot to Calverton (Maryland) | 3,606.68 mi (5,804.40 km) |
| Didcot to Camano (Washington) | 4,720.27 mi (7,596.53 km) |
| Didcot to Camarillo (California) | 5,415.76 mi (8,715.82 km) |
