Good morning and thank you for your question. It is technically safe to fly post filler injection, even on the same day. There is no scientific evidence that states otherwise. That said, there are a couple of noteworthy downsides to doing so...first, you may experience more swelling than the norm, if you fly shortly after getting filler. More importantly, however, is that if you happen to experience any adverse side effects from your filler, which is rare, but possible, you will not receive the same support from your provider as if you were in town. We have patients that fly same day, and fly in from all over the country for their injectables, and then return home and are completely fine. As long as you know, and accept, the possibility of increased swelling and limited support, then it is ok. Hope this helps!