Add frozen onion rings to air fryer basket (spray first with cooking spray if desired, and safe for your model of air fry machine). Make sure they’re in a single layer and not overlapping. A full bag of frozen onion rings fills up my basket, so I like to stand some up on the edges and position them so air can circulate around throughout the whole cook time.
Air fry frozen onion rings for 3 minutes. Toss air fryer basket or gently flip with tongs or a spatula, then air fry for an additional 2-7 minutes until cooked to your desired level of crispness. They should be golden brown.
Transfer to a serving dish and serve onion rings with blue cheese dressing, honey mustard dipping sauce, or the onion ring dip of your choice and a sprinkle of cilantro once they’re cool enough to eat.