In a small bowl, combine the cornstarch, smoked paprika, garlic powder, onion powder, oregano, cayenne, salt, and pepper.
Preheat the air fryer to 400ºF. Pat the chicken thighs dry with a paper towel.
Place the chicken thighs in a bowl and drizzle the cooking oil over top, then add the cornstarch and seasoning mixture. Toss the chicken thighs until they are well coated in oil and spices.
Place the chicken thighs in the air fryer basket, skin side up, and cook for 10 minutes.
Flip the chicken thighs and cook for 8 minutes more.
Serve and enjoy your delicious crispy chicken!