| Helena to Anoka (Minnesota) | 898.76 mi (1,446.42 km) |
| Helena to Ansonia (Connecticut) | 1,950.02 mi (3,138.25 km) |
| Helena to Antelope (California) | 721.33 mi (1,160.87 km) |
| Helena to Anthem (Arizona) | 880.30 mi (1,416.70 km) |
| Helena to Antioch (California) | 776.08 mi (1,248.98 km) |
| Helena to Antioch (Illinois) | 1,208.26 mi (1,944.51 km) |
| Helena to Apache Junction (Arizona) | 912.25 mi (1,468.12 km) |
| Helena to Apex (North Carolina) | 1,863.16 mi (2,998.47 km) |
| Helena to Apollo Beach (Florida) | 2,065.09 mi (3,323.44 km) |
| Helena to Apopka (Florida) | 2,054.84 mi (3,306.94 km) |
| Helena to Apple Valley (California) | 876.25 mi (1,410.18 km) |
| Helena to Apple Valley (Minnesota) | 915.35 mi (1,473.11 km) |
| Helena to Appleton (Wisconsin) | 1,152.40 mi (1,854.60 km) |
| Helena to Arbutus (Maryland) | 1,841.19 mi (2,963.11 km) |
| Helena to Arcadia (California) | 916.77 mi (1,475.40 km) |
