| Helena to Delaware (Ohio) | 1,506.54 mi (2,424.54 km) |
| Helena to Delhi (California) | 775.53 mi (1,248.09 km) |
| Helena to Delray Beach (Florida) | 2,227.97 mi (3,585.57 km) |
| Helena to Deltona (Florida) | 2,058.45 mi (3,312.76 km) |
| Helena to Deming (New Mexico) | 1,015.78 mi (1,634.75 km) |
| Helena to Denison (Texas) | 1,199.81 mi (1,930.91 km) |
| Helena to Dent (Ohio) | 1,467.38 mi (2,361.52 km) |
| Helena to Denton (Texas) | 1,210.83 mi (1,948.65 km) |
| Helena to Dentsville (South Carolina) | 1,834.05 mi (2,951.62 km) |
| Helena to Denver (Colorado) | 593.23 mi (954.72 km) |
| Helena to Depew (New York) | 1,641.82 mi (2,642.25 km) |
| Helena to Derby (Connecticut) | 1,949.83 mi (3,137.96 km) |
| Helena to Derby (Kansas) | 978.74 mi (1,575.12 km) |
| Helena to Des Moines (Iowa) | 974.57 mi (1,568.42 km) |
| Helena to Des Moines (Washington) | 487.92 mi (785.24 km) |
