This is major surgery: understanding the genuine physiological load
An extended tummy tuck is major surgery, and it is worth approaching it as such rather than as a longer version of a standard cosmetic procedure. A very large area of skin is lifted off the abdominal wall, the muscles are repaired along their full length, and the excision continues around the hips to remove flank skin as well. That combination produces a large raw surface, a long operation, and a substantial physiological load on the body, and the complication rate is meaningfully higher than for a standard tummy tuck as a direct consequence.
Two risks deserve particular emphasis for anyone travelling for this procedure. Blood clots: abdominoplasty already carries one of the highest rates in cosmetic surgery, an extended operation raises that risk further given the longer surgical time, and a long flight shortly afterwards compounds it again. And wound healing: the ends of the long scar over the hips are where tension is greatest and where separation most often occurs, and smoking multiplies that risk to the point where most careful surgeons will simply refuse to operate on active smokers.