$602/pp flight w/ stop in Toronto. Can fly United with a later start time, but flights are $727/pp. Delta is also an option. Didn't check Dulles or Regan yet.
$2275 4brm townhouse, 1 hr 12 min from Calgary Airport, 1 hr 37 min from Lake Louise which is 8 miles from Moraine Lake Lodge, 31 min from Banff Gondola, 3 hr 15 min from Paker Ridge, 42 min from Bow Valley Parkway : https://www.vrbo.com/683046# 
Lodging: Canmore rental home, $3900.42: https://www.vrbo.com/514013# (in Yellowstone our vacation rentals totalled $956/family for all 7 nights).
Sample itinerary with kids: http://www.fodors.com/community/canada/banfflake-louisejasper-in-june-with-kidsplease-tweak-my-itinerary.cfm
Moraine Lake:
Johnson Canyon:
Banff Gondola:
website about hiking in Banff: http://www.banfflakelouise.com/Things-To-Do/Summer-Adventures/Hiking-in-Banff-and-Lake-Louise
Hiking to Victoria Glacier from Lake Louise: http://banffandbeyond.com/plain-of-six-glaciers-the-other-tea-house-at-lake-louise/
Brewster Glacier Skywalk at Columbia Glacier, 2h 48min from Silvertip, Canmore:
Columbia Icefields:
You can go beyond just viewing the glaciers from the parkway by taking the Ice Explorer Adventure. It is a giant 6 wheeled all terrain vehicle that looks like something out of a futuristic movie. During the 90 minute experience it will take you right onto the Athabasca Glacier.
