Preheat air fryer to 350 degrees. Beat the cream cheese, onion, garlic, and salt in a small bowl on medium-low until creamy. Scrape down the sides of the bowl and set the bowl aside. Cut the tortillas in half. Turn one tortilla so the straight edge is vertical. Scoop 1 1/2 tsp of the cream cheese mixture into the upper corner of the tortilla half. Fold the top corner over the filling. Fold over two more times until almost all the tortilla is folded.
There should be a tortilla "tail sticking out. Keep the sides aligned at all times. Tuck the tortilla "tail" into the folded layers to create a package. Repeat the filling and folding process until all the filling is used. Lightly grease the basket of the preheated air fryer. Place the wontons in the basket in a single later.
Allow space between the wontons. Lightly spray the wontons with cooking spray Air fry at 350 degrees for 4 to 5 minutes or until golden and crisp. Open air fryer. Allow wontons to cool a couple of minutes before serving.