| Helena to Des Plaines (Illinois) | 1,227.97 mi (1,976.23 km) |
| Helena to Desert Hot Springs (California) | 904.99 mi (1,456.43 km) |
| Helena to DeSoto (Texas) | 1,254.99 mi (2,019.71 km) |
| Helena to Destin (Florida) | 1,764.26 mi (2,839.30 km) |
| Helena to Destrehan (Louisiana) | 1,632.72 mi (2,627.61 km) |
| Helena to Detroit (Michigan) | 1,446.17 mi (2,327.38 km) |
| Helena to Diamond Bar (California) | 921.76 mi (1,483.43 km) |
| Helena to Diamond Springs (California) | 705.59 mi (1,135.53 km) |
| Helena to Dickinson (North Dakota) | 437.12 mi (703.48 km) |
| Helena to Dickinson (Texas) | 1,494.81 mi (2,405.67 km) |
| Helena to Dickson (Tennessee) | 1,462.65 mi (2,353.90 km) |
| Helena to Difficult Run (Virginia) | 1,821.22 mi (2,930.97 km) |
| Helena to Dinuba (California) | 791.46 mi (1,273.74 km) |
| Helena to Discovery Bay (California) | 773.73 mi (1,245.20 km) |
| Helena to Dix Hills (New York) | 1,952.76 mi (3,142.66 km) |
