Whisk the orange jello powder with boiling water until fully dissolved. Set aside to cool for about 30 minutes.
Spray a 9-inch springform pan with cooking spray and line the bottom and sides with parchment paper.
Mix graham cracker crumbs, melted butter, and salt. Press into the bottom and slightly up the sides of the pan. Freeze for at least 30 minutes.
Beat the softened cream cheese with 1 cup powdered sugar until smooth and creamy, about 2 minutes.
In a separate bowl, whip the heavy cream, remaining powdered sugar, vanilla extract, and orange zest until stiff peaks form.
Fold half of the whipped cream into the cream cheese mixture.
Fold the remaining whipped cream into the cooled orange jello mixture.
Alternate spooning the cream cheese mixture and orange mixture into the crust. Gently swirl with a butter knife.
Cover and refrigerate for at least 6 hours or overnight until fully set.
Remove the springform ring, garnish with whipped cream and orange slices if desired, then slice and serve.