Would you drive back from the surgery?
I wish I could have taken a plane. But my surgery was emergency surgery and we did not have enough to pay a full fare; we would have had to schedule ahead to get a good price.
I'm sure age and health status make a difference as to when you should leave. I was 67 but healthy when i had my DS surgery in Nov 2012. Still, my age probably slowed recovery. It was 4 weeks before i felt moderately human, even then, I doubt I would have traveled well. Will you have someone to follow up with medically when you get home?