Italian sausage cooks for 13 to 20 minutes in the air fryer at 350 degrees. It depends on the air fryer as well as the size of the sausages. For this recipe, I used really large Italian Sausages from Whole Foods, that needed a hoagie to fit on, and they took 18 minutes to cook. The internal temperature should read 165 degrees. Be very careful when poking in the thermometer, as hot juice shot out of mine.