nobody seems to have answered you! So I will give it a go...
maybe the problem has gone away now but for the record, yes, jet lag has always screwed with my bgs. The main prob I get is with the dawn phenomenon thing - you prob know that your body pumps up the sugar early in the morning to get you going. If your body reckons it's 'morning' it will pump up that sugar even if actually it's 6 hours wrong.
I've always just ended up increasing my tests and trying to match what my body is doing, and getting it wrong, and getting frustrated, and eventually it all comes right.
hope you're managing ok now...