Preheat Air Fryer: Set your air fryer to 400°F (200°C) for 3 minutes.
Mix Seasoning: In a small bowl, combine paprika, smoked paprika, garlic powder, onion powder, thyme, oregano, cayenne pepper, salt, and pepper.
Prepare Salmon: Pat the salmon fillets dry with paper towels. Brush each fillet with olive oil.
Season: Rub the blackened seasoning evenly over the salmon, coating all sides.
Air Fry: Place the fillets in the air fryer basket, skin side down if using skin-on salmon. Cook for 7–9 minutes or until the salmon reaches an internal temperature of 145°F and the surface is slightly charred.
Serve: Squeeze fresh lemon juice over the top before serving.