Prepare the Glaze. In a small bowl, whisk together the honey, soy sauce, olive oil, minced garlic, grated ginger, ground black pepper, and red pepper flakes (if using). This delectable glaze will be the key to imparting rich flavor and a beautiful caramelization to the salmon.
Marinate the Salmon. Place the salmon fillets in a shallow dish or a resealable plastic bag. Pour half of the honey glaze over the salmon, reserving the other half for basting during cooking. Make sure the salmon is evenly coated with the glaze. Cover the dish or seal the bag and refrigerate for at least 30 minutes to allow the flavors to infuse into the salmon.
Preheat the Air Fryer. Preheat your air fryer to 400F for a few minutes to ensure it's nice and hot before cooking the salmon.
Air Fry the Salmon. Remove the salmon from the marinade and shake off any excess liquid. Place the salmon fillets in the air fryer basket, making sure they are not touching. Air fry the salmon for 8-10 minutes, depending on the thickness of the fillets. Baste the salmon with the reserved honey glaze halfway through the cooking time to enhance the flavor.
Serve and Garnish. Once the salmon is cooked to perfection, remove it from the air fryer basket and transfer it to a serving plate. Garnish with fresh lemon slices and chopped green onions for a burst of freshness and a pop of color.