Air Canada is getting in on the fare wars to Vegas.
Some decent prices in December and throughout January.
Calgary to Vegas - $237 USD
Sat - Wed, Dec 12-16 (or 14-17)
http://www.westjet.com
Wed - Sat, Jan 13-16 - $239 USD
http://www.aircanada.com
Fri - Tue, Jan 15-19 - $250 USD
Delta/AirCanada, check
http://www.kayak.com
In January, you can basically have your pick of 3-4 night trips for between $237-$280 USD.
Return price, all taxes included.
cM