1. In a mixing bowl, combine all-purpose flour, paprika, cayenne pepper, salt, and ground pepper.
2. Coat each onion ring with egg and then flour mixture.
3. Preheat Air Fryer to 390 F (200 C).
4. Place coated onion rings in the Air Fryer cooking basket. Spray with oil. Cook for about 15 minutes or until crisp and golden brown. Do not overcrowd, cook in batches if needed.