Crumble:

1/2 cup old-fashioned oats
1/4 cup all-purpose flour
1/4 cup (packed) light brown sugar
1/4 cup sliced almonds
1/2 teaspoon kosher salt
1/4 cup (1/2 stick) chilled unsalted butter, cut into 1/2" pieces

Pie:

Nonstick vegetable oil spray
1 pie crust, homemade or store-bought
3 24.7-ounce jars pitted sour cherries in syrup, drained well (about 6 cups)
3/4 cup sugar
1/4 cup bourbon
3 tablespoons cornstarch
2 tablespoons fresh orange juice
1 tablespoon finely grated orange zest