In a bowl, combine melted butter, crushed garlic, oregano, chili flakes, chopped parsley, and lemon juice. Mix well and season with salt and black pepper.
Pat the salmon fillets dry and season both sides with salt and pepper.
Place the salmon flesh-side down on a piece of parchment paper and brush half of the garlic butter mixture over the fish.
Place the salmon in the air fryer basket and cook at 200°C (390°F) for about 5 minutes until the skin becomes slightly crisp.
Carefully turn the salmon over and remove the parchment paper.
Brush the remaining garlic butter over the salmon and return it to the air fryer.
Cook for another 3–5 minutes or until the salmon reaches your preferred doneness. This step finishes the delicious garlic butter air fryer salmon.
Remove from the air fryer and serve with fresh lemon wedges.