creamy....don't get all worked up about flying, as it probably wont stir up your Meniere's at all, in fact many people feel that after flying, they have an extensive period of being symptom free.......make that as you wish.
Remember your have BPPN in one ear and Menieres in your other ear, although that shouldn't complicate the issue. My advice:
Try not to get worked up about the flight.
Take Sudafed spray 20 mins before take off and 20 mins before descent.
Take a double dose of Betahistine on the day of flight.
Have a good time.