The cooking time for chicken breast in an air fryer typically depends on the size and thickness of the chicken, as well as the specific model of your air fryer. Generally, for boneless, skinless chicken breasts, cook them at 360°F (182°C) for about 18-20 minutes. You should flip the chicken halfway through the cooking time to ensure even cooking. Always use a meat thermometer to check that the internal temperature has reached 165°F (74°C), which is safe for poultry. It's also a good idea to let the chicken rest for a few minutes after cooking to ensure it remains juicy. Adjustments may be needed based on the size of the chicken breast or specific air fryer models.