Use tongs to transfer the chicken to the air fryer and place in a single layer, working in batches if needed. If air frying at 400°F, air fry for 15 minutes. Flip the chicken and air fry for 13 to 15 minutes more. Alternatively, air fry at 425°F for 10 minutes. Flip the chicken and air fry for 10 to 12 minutes more. The chicken is done when it registers 165°F on an instant-read thermometer inserted into the thickest part.