I only get a week max child free, too. So, sometimes I only get to spend 4 or 5 days at my destination, when I have a holiday on my own. That sucks, but it's not down to the mode of transport I use, it's down to my wanker of an ex. From where I live it takes nearly as long to get to the closest proper airport as it does the train to London. And at least the train is properly relaxing and enjoyable- it forms part of the holiday for me. Sometimes I have to overnight somewhere on the way, and it's usually Paris. Oh no, a night in Paris- what a hardship 😆
Sometimes threads like this leave me thinking I'm making things difficult for myself, so I looked up flights to Nice from nearest- airport for the day I want to leave- Good Friday. There's only one per day, at 11.00, and it costs £236- single. Now, I'd have to be there at 9.00, and the train takes 4 hours- plus airport bus- and costs a fortune-so I'd never make it. I could drive, but I'd have to allow 4 hours (so leaving at 5.00am 😬) and then pay an extortionate amount for airport parking. When I last did it, I caught a flight to Venice, and had to pay for an AirBnB the night before (and Nailsea isn't as exciting as Paris for an overnight 😆).
Meanwhile, my entire travel to the South of France and back- with a 4 day Interrail pass I bought at a 25% discount in the sale- will be around £280- 300, and that's from my local station to wherever I want to go.
Flying just isn't worth the extra expense and hassle IMO.
I don't mind what personal choices other people make. What boils my piss is the automatic assumption that flying is always easier and cheaper, when quite often it isn't.