Slice chicken breasts, bell peppers and onions into thin strips and place in a large mixing bowl.
Add 1 package of pre-made Fajita or Taco seasoning.
Squeeze lime juice over mixture and add 1/4 cup of vegetable oil.
Mix ingredients until the chicken, peppers and onions are well coated with fajita seasoning.
Pour chicken fajita mixture into air fryer basket. Air fry for 15 minutes.