Record travel this holiday season means more delays and cancellations, but a well-designed airport can ease the flow of millions. Seamless passenger flow reduces confusion, makes airports more money and helps prevent delays. But how can check-in, going through security and dealing with TSA and terminal configuration be best optimized? WSJ asked an architect to break down how airports can be built to better manage crowds. Chapters: 0:00 Impact of increased travel 0:40 Landside: checking in 2:37