This late summer deal is valid from August 15 through September 19, 2018. The catch is you can only travel on Wednesdays for this price point. However, flights on Tuesdays, Thursdays, and Saturdays aren't too bad either, ringing up at $185-190 roundtrip if you can pair them with the Wednesday $57 one-way fares. Calgary to Las Vegas is $161 (210 CAD) roundtrip on these dates.
Travel to Calgary is perfect during this period, as peak summer crowds have fizzled from visiting majestic Banff and the rest of the Canadian Rockies; which are just a short trek outside of town. Searching on Air Canada's site, I found seats departing LAS on Wednesday, August 29th and returning from YYC on Wednesday, September 5, 2018.
If you're not an outdoorsy type, we've got a long list of deals departing all over to beach, city, and exotic destination listed on our Las Vegas (LAS) departure page.
Need a room in Stampede City? Here's what's available for the mentioned dates on Hotelwatchdog.