Clayton Keller had an empty-netter and Karel Vejmelka stopped 32 shots to help Utah get its second straight win.
Rasmus Andersson scored for Calgary and Dustin Wolf finished with 25 saves. The Flames lost for the third time in four games (1-2-1).
Stenlund gave Utah a 1-0 lead with 2:14 left in the first period with a one-timer from the inside edge of the right circle off a pass from Alexander Kerfoot for his 12th of the season.
Hayton doubled the lead at 2:25 of the second on a give-and-go with Sean Durzi, finishing up with a backhander in close from the left side for his 18th.
Andersson got the Flames on the scoreboard with seven minutes left in the middle period with his 11th.
Keller sealed it with an empty-net goal with 17.3 seconds remaining.
Flames: Calgary dropped to 5-2-1 in its last eight games and fell to six points out of the second wild-card berth in the Western Conference.
Utah: Utah improved to 2-2-1 in its last five games and 6-4-3 in the last 13 to move to eight points out of a playoff spot with seven games remaining.
In the final seconds of a Calgary power play in the third period, Vejmelka turned aside Joel Farabee at the side of the net to keep Utah ahead with seven minutes left.
Andersson’s goal was his 11th of the season, matching his career high from 2022-23, and his 229th career point to pass Dion Phaneuf for eighth on Calgary’s franchise’s scoring list among defencemen.
Flames: Host the Anaheim Ducks on Thursday.
Utah: Host the Los Angeles Kings on Thursday.
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