Have you spoken to your Pump DSN!
They should be able to give you some guidance on coping with the time zone changes! I know that my clinic for any of the diabetics, if you let them know where you travelling, times etc... They will help you to plan adjusting insulin through the time zones.. But you do need to give the as warning as possible at least several weeks.
Perhaps join the insulin-pumers.org mailing list, there's a few that I know of, that do long haul flights quite regularly, so a lot advise available