How long before my wedding should I have an arm Brachioplasty so the scars can minimally heal for appearance sake?

The longer you wait the better. To allow for adequate healing and arm scar maturation, I would have your arm lift surgery or brachioplasty done approximately 2 to 3 months before your wedding. After a brachioplasty your arm lift,  you should allow yourself at least 2 to 3 weeks to heal.  After this, there will be an additional 2 to 3 weeks of arm swelling.  I would strongly encourage wearing arm compression garments from your armpits to the elbow for 4 to 6 weeks.  This will minimize arm swelling or edema. The arm garment will accelerate healing from your arm lift or arm reduction surgery. In addition, the compression garment will help to flatten your arm lift scar. Once the arm lift incision has healed, I would suggest also a silicone-based cream to minimize our arm lift scars. Good luck. And congratulations! 

Congratulations on your upcoming wedding! A brachioplasty can do a wonderful job of reshaping the arms, but I caution all of my patients that the scars from this procedure can be relatively unattractive and more difficult to hide than on other parts of the body.  A scar will take 1-2 years to mature, so I recommend having your surgery a year or more prior to your wedding.  Despite the scar, many patients will feel that the improvement in shape is well worth it for them.  I was recently interviewed on the news for a story about women having plastic surgery before their weddings and they also interviewed my patient, who happened to have her brachioplasty about 11 months prior to her wedding.  You may find the video on my website including her story helpful as you plan for your surgery and wedding. Best wishes!