When can I do face surgery when doing surgery abroad?

when flying from far away to a new country for surgery, how many days do i have wait until i undergo surgery? f.ex if i fly from europe to usa ofr BBL im soon flying for 2h, another 12h, then to the final destination for 4h during during the 2 days journey. ill do jaw reduction, cheek reduction, chin implant and nose revision . how long do i have to wait and why?

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