Prep salmon: Pat salmon dry with paper towels. Drizzle with olive oil and rub evenly to coat. In a small bowl, mix garlic powder, onion powder, smoked paprika, salt, and pepper. Sprinkle evenly over the salmon and pat gently so the seasoning sticks.

Air fry: Arrange fillets in the air fryer basket skin side down. Cook at 400°F for 7–9 minutes, depending on thickness, until the salmon flakes easily with a fork and reaches an internal temp of 125–130°F for medium.

Serve: Squeeze with fresh lemon juice just before serving.