Megan - i would bath and bottle at normal time - before you go to airport. Take a couple of bottles with you so you can give to him on plane or the hotel if neccessary. He may not be 'due' for one on the plane but it will be handy to have one if he needs a bit of comfort. Try not to stress to much because Lucas will be able to tell something is going on! Have a great time - think of us - and look forward to hearing how it all went