Cost of Fat Transfer from Breast to Butt?

This procedure is not routinely performed.  There is not enough fat to transfer from breast unless the breasts are massive.

Thank you for your question. The cost average varies depending the doctor and location. I would suggest to be treated by board certified plastic surgeon with experience in this procedure, to get the best desired results.
Respectfully,-Dr. Emmanuel Mallol Cotes.- 

A Brazilian Butt Lift starts at 6,500, and varies depending on the number of areas treated, treatment length, and complexity of the procedure.

I am not sure that you could obtain sufficient amounts of fat from the breasts to adequately augment the buttocks. Generally this may take a minimum of 300cc and upwards of 700cc to achieve sufficient buttock enlargement. This would require that at least twice as much be harvested (600 to 1400cc) to process and purify.
Fees would take into account the amount of time which is significant. This would range from 6-12,000. However, this is only an estimate.

Hello dear!
Thanks for the question.
The average cost varies a lot depending on the clinic, the country and the plastic surgeon. l recommend you to make an appointment with a board certified plastic surgeon to talk about your goals and anything you need to know.
Good luck :)