hi redgrl and welcome.
I cannot answer from a microsurgical standpoint, but like you, I have also been nervous. I am leaving tomorrow for a 6 hr flight from Boston to London, England and have had extreme conversations with all of my dr's. I know marystro (on this site) does an extreme amount of flying and she has been very helpful to me as well.
I've been told that their really shouldn't be much in the way of cabin air pressure issues, especially if a short flight (under 2 hrs) as the planes tend to fly at lower altitudes. For me, I made sure with my docs as flying the ocean, long haul, over 40,000 feet is making me a bit nervous.
they told me to keep myself hydraded. Really keep hydrated. Maybe a decongestant to help with the "fullness" feel. Will have my Imitrex with me as well. Most of all, I'll be sleeping through my flight, so hoping that will do the trick. Keep a "yawn" going to help pop that ear fullness as well..... or try chewing gum, if you can.
The main emphasis was keeping fluid intake... keep drinking lots of water on board and you should do fine.
Hang in there and bon voyage! Have a great trip to Philly! You should do just fine!
Phyl