First Canadian airline operating nonstop from Calgary to Denver CALGARY, Alberta, 2018-Mar-12 — /Travel PR News/ — Today (March 8, 2018), with the departure of flight 1570 from Calgary International Airport (YYC), WestJet becomes the first Canadian airline flying nonstop to Denver International Airport (DEN) from Calgary. The new service operates daily year-round. “Denver is a… Read the full press release