01 - Pat chicken thighs dry with paper towels and season lightly with salt and black pepper on both sides.
02 - In a medium bowl, whisk together sweet chili sauce, soy sauce, honey, rice vinegar, garlic, ginger, and red pepper flakes until thoroughly combined.
03 - Add chicken thighs to the bowl and toss to coat evenly. Let marinate for at least 10 minutes, or refrigerate for up to 2 hours for deeper flavor development.
04 - Preheat air fryer to 400°F for 3 minutes before cooking.
05 - Place marinated chicken thighs skin-side up in the air fryer basket in a single layer, ensuring they do not overlap. Reserve the remaining marinade for later.
06 - Air fry the chicken for 14 minutes at 400°F.
07 - While chicken cooks, transfer the reserved marinade to a small saucepan. Bring to a boil, then reduce heat and simmer for 2–3 minutes until slightly thickened.
08 - Brush the chicken thighs generously with the thickened glaze. Return to the air fryer and cook for an additional 4 minutes, or until the skin is crispy and the internal temperature reaches 165°F.
09 - Remove chicken from the air fryer and let rest for 2–3 minutes. Garnish with chopped cilantro or green onions and sesame seeds before serving.