In a shallow bowl, beat the eggs.
In another bowl, add the cornflakes, ranch dressing, and oil and mix until a crumbly mixture forms.
Dip the fish fillets into egg and then coat with the breadcrumbs mixture.
Grease the Air Fryer Basket with cooking spray and then slide inside.
Adjust the temperature of Air Fryer to 355 °F to preheat for 5 minutes.
After preheating, arrange the fish fillets into the greased Air Fryer Basket in a single layer.
Slide the basket into Air Fryer and set the time for 14 minutes.
While cooking, flip the fish fillets once halfway through.
After cooking time is finished, remove the fish fillets from Air Fryer and serve.