| Twickenham to Carson (California) | 5,449.12 mi (8,769.52 km) |
| Twickenham to Carson City (Nevada) | 5,191.76 mi (8,355.33 km) |
| Twickenham to Carteret (New Jersey) | 3,468.52 mi (5,582.04 km) |
| Twickenham to Cartersville (Georgia) | 4,196.04 mi (6,752.87 km) |
| Twickenham to Carthage (Missouri) | 4,424.65 mi (7,120.78 km) |
| Twickenham to Cary (Illinois) | 3,949.51 mi (6,356.12 km) |
| Twickenham to Cary (North Carolina) | 3,873.89 mi (6,234.42 km) |
| Twickenham to Casa de Oro-Mount Helix (California) | 5,468.41 mi (8,800.56 km) |
| Twickenham to Casa Grande (Arizona) | 5,284.42 mi (8,504.45 km) |
| Twickenham to Casas Adobes (Arizona) | 5,289.54 mi (8,512.70 km) |
| Twickenham to Cascades (Virginia) | 3,665.40 mi (5,898.89 km) |
| Twickenham to Casper (Wyoming) | 4,563.57 mi (7,344.35 km) |
| Twickenham to Casselberry (Florida) | 4,322.57 mi (6,956.50 km) |
| Twickenham to Castaic (California) | 5,424.30 mi (8,729.56 km) |
| Twickenham to Castle Pines (Colorado) | 4,691.07 mi (7,549.54 km) |
