In my practice, I tell out of town patients to wait at least a week, and preferably two before a flight. As others have mentioned you can have bleeding and the congestion in the nose might be to a degree that your eustachian tubes cannot help equilibrate the pressure gradient during flight (much the same way as when you fly if you have a upper respiratory or sinus infection). This could possible lead to pain and perforation of the ear drums. Of course you would need to speak to your surgeon regarding your specific case. Hope this helps.
I would suggest you discuss your concerns with your plasticsurgeon who should be certified by the American Board of Plastic Surgery and ideally a memberof the American Society for Aesthetic Plastic Surgery (ASAPS) or facial plasticsurgeon (otolaryngologist) that you trust and are comfortable with. You should follow all of her or his advice.Robert Singer, MD FACSLa Jolla, California