Runway for the things that show
Work backwards from the departure date, not forwards from today.
Neuromodulators need about two weeks. Not because of downtime, which is minimal, but because the effect isn't finished arriving until then and because the two-week review is the appointment that fixes anything uneven. Book both visits before you fly. Landing abroad with an asymmetric brow and nobody to call is a specific kind of miserable.
Filler wants two weeks as well, and for a different reason. Swelling is largest in the first few days and takes a fortnight to fully resolve. Bruising in the lip and under-eye areas can outlast makeup's ability to cope. Three days is not enough, whatever you've been told, and the photographs from that trip are permanent.
Microneedling needs a full week for a face you'd be happy to be photographed in, and we'd stretch that to ten days if the trip is a wedding rather than a beach.
Chemical peels vary enormously by depth. A very light one might need four or five days. Anything medium needs a fortnight and honest conversation with the provider about what your particular skin does while it sheds.
PRP facials sit somewhere near the light end, usually a few days of redness, but they're commonly sold as a course and a single session immediately before travel is rarely worth the slot.
