In a shallow bowl, combine the flour, paprika, and salt.
In a separate shallow dish, combine the egg and water. Whisk to combine.
Place breadcrumbs in a bowl or 3rd shallow dish.
To coat onion rings, dip into the flour mixture, followed by the egg mixture and then breadcrumbs. Be sure to coat entire onion ring thoroughly.
Coat both sides evenly with cooking spray and place in single layer in air fryer basket.
Cook at 375 degrees for about 10 minutes, turning over one time 5 minutes through.
Once golden brown, remove from basket and serve!