I am pre-op, but I have already talked to my local doctor about this. Though I am married, my wife does not want to travel to a strange city with me where she'd be on her own most of the time and doesn't speak the primary language.
According to my doctor, who has sent many trans women off for surgery, about the only thing you really need a companion for is handling luggage on the way home. There are alternatives. I will ensure that my luggage, including my carry-on has wheels. I will get the cab driver and/or a porter to lift my bags out of the taxi. I will ask airline personnel or a porter to lift my checked bag onto the scale or conveyor when I check in. I will ask the airline staff for boarding assistance, possibly with a wheelchair and certainly to do any bag lifting.
Arriving home, again I will ask for help with my bags. I don't think my wife will be comfortable driving to the airport, so I'll probably take a bus. The bus driver normally does all the lifting.
If necessary, I can play up being the poor weak woman who has just had surgery for "woman problems". It shouldn't be hard to do, since it's true. There are enough macho men around who will fall for that.
When I asked my doctor about the practicality of all this, she agreed that I had figured out how to negotiate most of the obstacles. She had recently sent a trans woman for surgery who had no travelling companion. In spite of having some mental health challenges, and the obvious limitations of having just had surgery, she had no difficulties.