We did it the other week a 1 hour flight to Glasgow purley to see how he would react sounds mad i no,we stayed over night in a hotel and came back in the morning,it took time to pre pare him though.
We started first seeing what he was like on train journeys he was ok he enjoyed it, we stayed away from crouds and showed him pictures of the train so he would have an idea what was happening,also he had his favourate books and a little computer game and his ipod with favorate songs on it.
The flight went very well his ears didn't even pop,he spent the whole time looking out the window.
Also we let the people no he was autistic in advance so we didn't have to wait around he was first on the plane they were really good about it.We might go abroad somewhere now we are so excited and more relaxed.