Please forgive me if this has been asked before, but I've done a search and also scrolled through 7 pages of posts on this board and I haven't found the answer. If my cruise (NCL British Isles on Dawn) docks at 5am on a Wednesday, what is the earliest time I should book a return flight out of Heathrow, same day, to the U.S.? Is 12:20 too early? I do not have Global Entry.
Thanks in advance for any advice you can offer,
Gray