In a small mixing bowl, whisk together the freshly squeezed orange juice, honey, soy sauce, garlic powder, and parsley until combined; set the sauce aside.
Lightly coat a shallow baking pan that fits inside your air fryer basket with olive oil, avocado oil, or cooking spray.
Pat the salmon fillets dry with paper towels and arrange them in the prepared pan in a single layer.
Pour the prepared orange-honey sauce over the salmon fillets; if they do not fit in one layer, divide the sauce and cook in batches.
Place the pan in the air fryer basket and cook at 350°F for 7–9 minutes, or until the internal temperature reaches 120–125°F for medium-rare to medium doneness.
Remove the salmon from the pan and reserve the pan juices.
In a small bowl, whisk the cornstarch and water to make a smooth slurry, then whisk the slurry into the hot reserved pan juices until the sauce thickens.
Drizzle the thickened sauce over the salmon fillets and serve.
