Preheat oven to 350°F and grease an 8.5 x 4.5-inch loaf pan with cooking spray.
In a medium bowl, whisk together 2 cups flour, 3/4 tsp baking soda, and 1/2 tsp salt.
In a large bowl, beat 1 cup sugar and 1/4 cup softened butter until light and fluffy (about 1 min).
Add 1 cup mashed bananas, 2 eggs, 1/3 cup yogurt, and 1 tsp vanilla extract; beat until well combined.
Gradually add the dry ingredients; mix on low speed just until combined—do not overmix.
Toss 1 1/2 cups blueberries with 1 tbsp flour, then gently fold them into the batter.
Pour batter into the prepared pan and smooth the top; press a few extra blueberries on top if desired.
Bake for 60–70 minutes, or until a toothpick inserted in the center comes out clean.
Cool in pan for 10 minutes, then remove and let cool completely on a wire rack.