Pre-heat air fryer to 370°F.
Spray the basket of the air fryer with cooking spray.
In a bowl, mix the chicken, pepper, and onion with the olive oil and lime juice.
Add all spices and toss to coat.
Place the fajitas in the air fryer. If you have a small air fryer you may need to work in batches. Some overlap is find, but not multiple layers.
Cook in the air fryer for 15 minutes. At the halfway point, use a tongs to stir the fajitas and allow them to continue cooking.
Serve the Air Fryer Chicken Fajitas with tortilla, sour cream, tomatoes, cheese, and cilantro.