I wore Dr Scholl's, Macau (Velcro) Walkers, with replacement full gel innersoles & foam cushion innersoles on top of that... the whole trip.
Planes, busses, cabs, walking - you name it.
They were great (and look just like New Balance 574 Velcro Walkers)
But I had to smuggle them on to the plane. Actually they passed thru the watching machine when they made me take my shoes off & put them in the tray. I had 2 more pair in my checked baggage and extra foam ones in my carry-on ....just in case.
But it wasn't necessary, they went thru-even tho the Delta Flight baggage and carry-on regs say you can't have them.
(so did my butane lighters in my fanny-pack, too!)