Pat the salmon fillets dry with paper towels to remove excess moisture, ensuring the skin crisps up nicely.
Preheat your air fryer to 400°F (200°C) for about 3 minutes so it’s hot and ready to go.
Brush the salmon skin lightly with olive oil to help it crisp and season with salt and pepper on both sides.
Place the salmon fillets skin-side down in the air fryer basket, laying them flat and ensuring they don’t touch each other.
Cook for 8-10 minutes, until the skin is golden and crispy, and the flesh starts to flake when gently pressed.
While the salmon cooks, melt the butter in a small saucepan over low heat, then add the minced garlic and cook until fragrant, about 1 minute.
Stir in the freshly squeezed lemon juice into the melted butter, creating a bright lemon-butter sauce.
Carefully flip the salmon using tongs or a spatula, being gentle to prevent tearing the skin, then baste the top with the lemon butter sauce.
Cook for an additional 2-3 minutes, until the flesh is opaque and flakes easily, and the lemon butter has pooled around the fish.
Transfer the salmon to a serving plate, spoon the remaining lemon butter over the top, and garnish with chopped parsley or dill if desired.
Serve immediately, enjoying the crispy skin, tender flesh, and flavorful lemon butter drizzle with your favorite sides.