01 - Pat chicken thighs dry with paper towels. Season lightly with salt and black pepper.
02 - In a medium bowl, whisk together sweet chili sauce, soy sauce, honey, rice vinegar, garlic, ginger, and red pepper flakes until well combined.
03 - Add chicken thighs to the bowl and toss to coat thoroughly. Let marinate for at least 10 minutes, or up to 2 hours in the refrigerator for deeper flavor.
04 - Preheat air fryer to 400°F for 3 minutes.
05 - Arrange chicken thighs skin-side up in the air fryer basket in a single layer. Reserve remaining marinade for glazing.
06 - Air fry for 14 minutes.
07 - While chicken cooks, transfer reserved marinade to a small saucepan. Bring to a boil, then simmer for 2–3 minutes until slightly thickened.
08 - After 14 minutes, brush chicken thighs with thickened glaze. Air fry for an additional 4 minutes, or until the skin is crispy and the internal temperature reaches 165°F.
09 - Remove chicken and let rest for 2–3 minutes. Garnish with cilantro or green onions and sesame seeds before serving.