Yes, you can! Preheat your air fryer to 400ºF, peel and slice the plantains and place them in the air fryer, spraying with cooking spray. Fry for 3 minutes, flip and fry again for another 2 minutes. Remove and flatten the plantain slices, then return them to the air fryer, spraying them again with the oil. Working in batches, fry for another 5 minutes, flip them (spraying once more) and fry for another 5 minutes, or until golden and crunchy.