| Didcot to Carson (California) | 5,412.76 mi (8,710.99 km) |
| Didcot to Carson City (Nevada) | 5,156.73 mi (8,298.96 km) |
| Didcot to Carteret (New Jersey) | 3,428.21 mi (5,517.16 km) |
| Didcot to Cartersville (Georgia) | 4,155.76 mi (6,688.05 km) |
| Didcot to Carthage (Missouri) | 4,385.17 mi (7,057.25 km) |
| Didcot to Cary (Illinois) | 3,910.09 mi (6,292.69 km) |
| Didcot to Cary (North Carolina) | 3,833.55 mi (6,169.50 km) |
| Didcot to Casa de Oro-Mount Helix (California) | 5,431.60 mi (8,741.31 km) |
| Didcot to Casa Grande (Arizona) | 5,246.65 mi (8,443.67 km) |
| Didcot to Casas Adobes (Arizona) | 5,251.56 mi (8,451.57 km) |
| Didcot to Cascades (Virginia) | 3,625.10 mi (5,834.04 km) |
| Didcot to Casper (Wyoming) | 4,526.61 mi (7,284.87 km) |
| Didcot to Casselberry (Florida) | 4,282.30 mi (6,891.69 km) |
| Didcot to Castaic (California) | 5,388.12 mi (8,671.35 km) |
| Didcot to Castle Pines (Colorado) | 4,653.23 mi (7,488.66 km) |
