Wash calamari and cut into ¼-inch rings.
Transfer the calamari into a bowl and cover with club soda.
Set aside for about 10 minutes.
In another bowl, add flour, red pepper flakes, salt and black pepper and mix well.
Drain the club soda from calamari.
With the paper towels, pat dry the calamari rings.
Coat the calamari rings with flour mixture evenly.
Grease the Air Fryer Basket with cooking spray and then slide inside.
Adjust the temperature of Air Fryer to 375 °F to preheat for 5 minutes.
After preheating, arrange the calamari rings into the greased Air Fryer Basket in a single layer.
Slide the basket into Air Fryer and set the time for 13 minutes.
While cooking, shake the basket occasionally.
After cooking time is finished, remove the calamari rings from Air Fryer and serve.