Preheat the air fryer to 400°F (200°C).
Pat the chicken breasts dry with paper towels to ensure even browning.
In a small bowl, whisk together the olive oil, salt, pepper, garlic powder, onion powder, smoked paprika, and oregano.
Coat each chicken breast thoroughly with the seasoning mixture on both sides.
Place the chicken in the air fryer basket in a single layer, ensuring no overlapping.
Cook for 9 minutes, then flip each chicken breast using tongs.
Cook for an additional 7 to 9 minutes until the internal temperature reaches 165°F (74°C).
Transfer the chicken to a cutting board and allow it to rest for 5 minutes before slicing and serving.