How long does the procedure take? A. The lap band typically takes 1-2 hours while the sleeve gastrectomy and gastric bypass take about 2-3 hours. By Margaret Matlock|2021-09-25T19:13:11+00:00September 25, 2021|Bariatric Surgery|0 Comments Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkXingEmail About the Author: Margaret Matlock Leave A Comment Cancel replyYou must be logged in to post a comment.