Were u a good flyer b4 Parkinsons?
If its post PD I can relate that i have flown twice .. 3 hrs ish to Spain.. I got a bit stressed my lack of foot room , proximty of people etc: ... 1 thouht ..get an aisle seat .. go to loo for the exercise!
I took books,games,mobile with music on ... and took a Beta blocker
and the hols were great !