About 513.4 kilometers. The driving time might be somewhere near 4 hours 47 minutes.
Calgary is in Alberta.
It is 301 miles according to Google Maps.
The driving distance from Helena, Montana to Calgary, Alberta, Canada is 409 miles via I-15 N per MapQuest. The driving time per MapQuest is 6 hours and 15 minutes.
Zero miles. Calgary is in Alberta.
The driving distance from Calgary, AB, Canada to Kalispell, MT 59901, USA is 306.23mi / 492.83km
328 miles
The driving distance from Calgary, AB, Canada to Banff, AB, Canada is 128km
The driving distance from Calgary, AB, Canada to Bonnyville, AB, Canada is about 547km
The driving distance from Calgary, AB, Canada to Kananaskis, AB T0L, Canada is 86km
It is 185 miles according to Google Maps.
1544 miles
The driving distance from Calgary, AB, Canada to Red Deer, AB, Canada is 147km