6 weeks post-op - will this flap on the side of my breasts go away? (Photos)

It is still very early in your recovery process to judge the final result. By 3 months the swelling should have gone down enough that you will get a sense of what things will look like, even though it takes scars a year to mature. If those folds do not go down, they can be improved with a simple scar revision. As for the scars, the redness you see is part of the normal maturation process of the scars, you can use silicone gel pads on the scars to help them mature faster, as well as scar massage to the areas for 5 minutes 2x per day (for 3 months!)

Thank you for your pictures.  You result is very good.  The contour that you are concerned with will need liposuction and/or excision of that area.  Best wishes.

Thanks for the question and photo's. The redundant skin and soft tissue laterally over the outside part of your reduced breast only only improve slightly. These are "dogs ears" not a great descriptive term. Best to leave everything for at least 3 months and continue with a good support bra and scar management/massage. Good luck and thanks.