Re: Credit card: don't forget to put down any stops or layovers you might have scheduled. If you overnight somewhere or have a flight cancelled you may make purchases in that city and want them included. I had a flight change in Chicago from Denver to St. Maarten and had a card refused in an an airport shop while waiting for my flight. I called them and they said "We show you making a purchase in Denver this morning and a couple of hours later in Chicago which doesn't match your habits! I told them I was in the airport (you idiot!). They had my flying dates and itinerary but I had not included Chicago! Oh Well. at least the system works!