Start by stirring together chili powder, cumin, paprika, salt, white sugar, garlic powder, and onion powder in a bowl. You will notice the fragrant spices creating a warm aroma. This blend is what makes the chicken so flavorful. Just be careful not to make it too spicy if you are sensitive.
Toss the sliced chicken, bell peppers, and red onion with the olive oil and your spice mix in a large bowl. As you mix, the colors will pop and the savory smell will fill your kitchen. This step ensures every bite is packed with flavor, but do not overmix or you might break the chicken.
Place the chicken mixture in the air fryer basket in a single layer. You will see everything cozied up, but do not overcrowd the basket, or the chicken will not crisp up nicely. Cooking it wisely here makes sure the chicken stays juicy.
After a few minutes, add in the bell peppers and onions. The sizzling sound and sweet aroma signify that they are ready to join the party. Timing this right helps achieve tender veggies without overcooking. Just keep an eye out so nothing gets mushy.
While everything is cooking, warm your tortillas in a skillet for a minute on each side, until they are soft and pliable. You will love that lovely, toasty smell wafting through. It is tempting to skip this, but warm tortillas really elevate your fajitas' experience.
Layer the air-fried chicken and veggies on your tortillas and add your favorite toppings. You will see how inviting they look, with fresh colors and textures. This part is all about personal preference, so go wild! Just remember not to overload them, or they might burst.