We will be on the Infinity Panama Canal-South America cruise January 18. The cruise ends at Valpariso, port city for Santiago, Chile. Celebrity has two full day excursions in Santiago but warns that passengers booked for flights out of Santiago before 8 p.m. or 9 p.m. should not sign up for the excursions. We have already booked our round trip air through Celebrity at very good prices but won't be informed of the flight arrangements until two weeks before the cruise. They could put us on a plane that leaves either earlier or later than 9 p.m. Question is whether we should go ahead and do a post-cruise extension for a day at a hotel in Santiago so that we can see the sights there. We don't want to just get off the ship and go to the airport to go home. Since we are in Santiago, we want to spend a little time there before going back home. If we do a post-cruise extension at a hotel through Celebrity they will adjust our return flight time accordingly. On the other hand, if our flight leaves Santiago at 9 p.m. or after we would prefer to tour the city and then leave on a night flight. Any advice?