Tele-conference your part. Think of all the trouble and hassle you'd be avoiding.
In all seriousness, see if they won't bump the fare up to First Class (Business, whatever the h__l they call it these days) and remain COMFORTABLE!
I'm in my 60's and don't travel well at all. If the Vienna Phil. invited me to play a Bruckner or Mahler symphony with them, that I'd do. But I'd break the trip up and take two days to get there. The TSA and customs business is absurd, regardless of how necessary it all may be. As the world gets smaller and faster, it also gets more annoying and complicated - how's that for a grumpy old person's take?