| London Colney to Dixon (Illinois) | 4,005.53 mi (6,446.27 km) |
| London Colney to Dobbs Ferry (New York) | 3,430.89 mi (5,521.48 km) |
| London Colney to Doctor Phillips (Florida) | 4,337.87 mi (6,981.13 km) |
| London Colney to Dodge City (Kansas) | 4,597.58 mi (7,399.08 km) |
| London Colney to Dolton (Illinois) | 3,944.45 mi (6,347.99 km) |
| London Colney to Donna (Texas) | 5,132.34 mi (8,259.70 km) |
| London Colney to Dorado (Puerto Rico) | 4,200.76 mi (6,760.48 km) |
| London Colney to Doral (Florida) | 4,422.92 mi (7,118.01 km) |
| London Colney to Doraville (Georgia) | 4,182.35 mi (6,730.84 km) |
| London Colney to Dothan (Alabama) | 4,360.60 mi (7,017.71 km) |
| London Colney to Douglas (Arizona) | 5,282.30 mi (8,501.04 km) |
| London Colney to Douglas (Georgia) | 4,242.28 mi (6,827.29 km) |
| London Colney to Douglasville (Georgia) | 4,208.22 mi (6,772.47 km) |
| London Colney to Dover (Delaware) | 3,579.64 mi (5,760.87 km) |
| London Colney to Dover (New Hampshire) | 3,217.92 mi (5,178.74 km) |
