Drew's idea of the walkoff is a good one if you do not have much luggage, but if you do, it is unfair to other passengers if you are lugging too much stuff plus a pain to you. The last day you can pick up luggage tags that will get you off asap. Assuming you clear customs fast (whcih the ship should) you will be just fine. Although I recommend no one get a return flight before noon you are talking about a few minutes. I think you will be just fine. You should be at the airport by 10am or 10:30 at the latest I would guess.
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