Lake Louise is 186 KM 120 miles west of Calgary, and 56 KM 36 miles West of the town of Banff.
Calgary International Airport is a 2.5 hours drive to Lake Louise. There are several car rental agencies at the airport or you can book one of the many shuttles which drop off at hotels in Banff and Lake Louise.
If you want to book your airport shuttle ahead of time check out these companies: Brewster Airporter & Resort Connector (http://www.sightseeingtou...), Mountain Connector (http://www.mountainconnec...), Banff Airporter Inc. (http://banffairporter.com)
Greyhound does a few different scheduled runs throughout the day from the Calgary Bus Terminal.
If you are driving and would like to check out the Parks Canada road report (http://www.pc.gc.ca/apps/...)
