I expect this was a ferry flight based on the 7000-series flight number. Nonstop YYZ-YYC Q400, 5 hrs. 18 min. Some new Q400 routes were started in western Canada on May 1 so probably related to that.
As a sidenote, t believe the last regularly scheduled nonstop propeller service YYZ-YYC was a daily AC (then TCA) L-1049G Super Constellation in 1961 with block time of 6:45. It was replaced April 15, 1961 by a DC-8 with a block time of 4:00, almost 3 hours faster. Fifty-two years later the fastest YYZ-YYC block times are 10 to 15 minutes longer than half a century ago.
However that one daily DC-8 in 1961 was the only YYZ-YYC nonstop. Now there are up to 22 daily on AC and WS combined..