Line air fryer basket with slices of bacon, making sure they don't overlap. (The sides can be touching.) Depending on the size of your air fryer basket, will depend on how many slices you can cook at one time.
Cook for 7.5 minutes at 400 degrees for floppy bacon. Cook 10 minutes for crispy bacon. (Or cook until the desired crispiness is reached, as different brands of air fryers can vary for cook time.)
Notes
Different brands and models of air fryers can make the cooktime vary. If this is your first time that you're making bacon in the air fryer, it's best to check it at about 7 minutes to make sure it's to your desired doneness.