Gather all of your ingredients together.
A basting brush, seasoning salt, garlic herb seasoning, paprika, kosher salt, black pepper, butter, onion, garlic clove, lemon, and olive oil.
Mix all those ingredients together then drizzle your olive oil in the mixture to get a thick paste. Take the butter and rub it under the skin of the chicken.
Once you have done that place a whole onion, garlic clove, and lemon in the opening of the whole chicken.
Spray the inside of the air fryer with nonstick spray and add in the whole chicken breast side down.
360F for 30 minutes then take the chicken out and turn it breast side up. Place back in the air fryer for another 25 minutes.