Preheat the air fryer to 360°F (182°C).
Spray both sides of each chicken breast lightly with cooking spray.
Season both sides of the chicken with salt, black pepper, and poultry seasoning if using.
Place the chicken breasts in a single layer in the air fryer basket, leaving space between pieces for air circulation.
Cook for 9 minutes, then flip each breast and cook an additional 9 minutes.
Check the internal temperature with a meat thermometer; it should read 165°F (74°C). If needed, cook a bit longer until done.
Remove the chicken and let it rest for a few minutes before serving.