| Fallbrook to Des Plaines (Illinois) | 1,701.01 mi (2,737.51 km) |
| Fallbrook to Desert Hot Springs (California) | 56.39 mi (90.76 km) |
| Fallbrook to DeSoto (Texas) | 1,179.48 mi (1,898.18 km) |
| Fallbrook to Destin (Florida) | 1,809.53 mi (2,912.16 km) |
| Fallbrook to Destrehan (Louisiana) | 1,592.40 mi (2,562.72 km) |
| Fallbrook to Detroit (Michigan) | 1,947.27 mi (3,133.83 km) |
| Fallbrook to Diamond Bar (California) | 55.19 mi (88.81 km) |
| Fallbrook to Diamond Springs (California) | 419.44 mi (675.02 km) |
| Fallbrook to Dickinson (North Dakota) | 1,201.89 mi (1,934.26 km) |
| Fallbrook to Dickinson (Texas) | 1,332.09 mi (2,143.79 km) |
| Fallbrook to Dickson (Tennessee) | 1,699.33 mi (2,734.80 km) |
| Fallbrook to Difficult Run (Virginia) | 2,239.79 mi (3,604.59 km) |
| Fallbrook to Dinuba (California) | 251.56 mi (404.85 km) |
| Fallbrook to Discovery Bay (California) | 398.09 mi (640.67 km) |
| Fallbrook to Dix Hills (New York) | 2,446.61 mi (3,937.43 km) |
