Preheat the air fryer to 360°F (about 182°C).
Spray both sides of each chicken breast lightly with cooking spray.
Season both sides of the chicken generously with salt, black pepper, and poultry seasoning if using.
Place the seasoned chicken breasts in a single layer in the air fryer basket without overlapping.
Cook for 9 minutes, then flip each breast and continue cooking for another 9 minutes, or until the internal temperature reaches 165°F (74°C).
Remove the chicken from the air fryer and let it rest for a few minutes before serving.