Obviously every NV child with ASD is different, but you said your son has good receptive language. So social
stories that I write myself, using as little detail as possible, work
well for us. We also get DS involved in booking the seats on the aeroplane so that he retains some control over where he sits.
Like another poster said, as generic as possible! The Topsy and Tim book about going on holiday wouldn’t have worked for us in case there were steps to the plane instead of a tunnel, for example. Topsy and Tim sit in together in front of mum and dad, which would t happen with us.
Short flight time works better. The Balearics offer a similar type holiday to Greece or the Canaries, but are two hours closer.
A self catering villa with a pool generally works better for us than a hotel as it gives more space, privacy, more control over layout, food is easier etc.
Pay for extra luggage and weight allowance so that you can take as many things that he’s familiar with as possible.
You’ve had some really good advice on this thread though. I went through a time where I wondered if (having always flown a couple of times a year with DS - learning disability, ASD ++) whether we should forever holiday in the UK. He gets travel sick on planes. But we’ve learnt how to manage, he loves it when we’re there, we have other children who enjoy the holiday too etc.
We’ve also driven to France, and that works well as we can just load up the boot with loads of toys and not worry about the weight.