Preheat the air fryer to 380°F.
In a large bowl, combine olive oil, garlic powder, onion powder, smoked paprika, salt, black pepper, and oregano. Mix well to create a marinade.
Add the chicken breasts to the bowl and coat them evenly with the marinade. Let them marinate for at least 15 minutes for better flavor.
Place the marinated chicken breasts in the air fryer basket in a single layer.
Cook for 12-15 minutes, flipping halfway through, until the internal temperature reaches 165°F.
Remove the chicken from the air fryer and let it rest for 5 minutes before slicing.