We went to Hawaii a few years ago and I can remember unexpectedly hitting imigration in Dublin airport before we left.

I tried looking at flights on Expedia's UK website but that seems to have the same booking restriction as the US website (i.e. UK credit cards only). I could arrange for it to be done through relations but I'm curious as to why this is imposed. I'll probably ring anyway when we're ready to book.

Thanks for the Virgin tip Phil but at the moment their website indicates a stopover. Also, their prices are well above the odds. If I look at their most expensive price, it's £20,089.60 for 3 adults and a 2 year old on a return journey!