435.74 kilometres (270.76 miles)
If you were to drive from Kalispell to Helena through Seeley Lake, it's about 190 miles, and takes about 3 to 3 1/2 hours to drive. If you were to drive to Helena through Missoula, however, it is...
10,675.26 kilometres (6,633.32 miles)
It's 2656 miles or 4274 kilometers.