| Helena to Abilene (Texas) | 1,172.99 mi (1,887.75 km) |
| Helena to Accokeek (Maryland) | 1,845.03 mi (2,969.28 km) |
| Helena to Acworth (Georgia) | 1,668.23 mi (2,684.76 km) |
| Helena to Ada (Oklahoma) | 1,142.86 mi (1,839.25 km) |
| Helena to Addison (Illinois) | 1,225.70 mi (1,972.58 km) |
| Helena to Addison (Texas) | 1,235.70 mi (1,988.66 km) |
| Helena to Adelanto (California) | 876.96 mi (1,411.32 km) |
| Helena to Adelphi (Maryland) | 1,836.05 mi (2,954.84 km) |
| Helena to Adrian (Michigan) | 1,414.08 mi (2,275.74 km) |
| Helena to Affton (Missouri) | 1,230.33 mi (1,980.02 km) |
| Helena to Agoura Hills (California) | 929.35 mi (1,495.64 km) |
| Helena to Aguadilla (Puerto Rico) | 3,194.02 mi (5,140.28 km) |
| Helena to Aiken (South Carolina) | 1,822.40 mi (2,932.87 km) |
| Helena to Akron (Ohio) | 1,556.39 mi (2,504.77 km) |
| Helena to Alabaster (Alabama) | 1,612.63 mi (2,595.28 km) |
