Preheat the air fryer to 380°F / 193°C for 3 minutes.
Pat the chicken thighs dry, then rub with olive oil and season all over with garlic powder, smoked paprika, onion powder, black pepper, and salt.
Place the chicken thighs skin-side down in the air fryer basket in a single layer without overlapping.
Air fry for 10 minutes, then flip skin-side up and cook for 8 more minutes until the skin is golden and crispy and the internal temperature reaches 165°F / 74°C.
Rest for 3 minutes before serving to let the juices redistribute.