Rocking up to the airport late might seem reckless - but it could have one big benefit. Most airlines advise arriving for a short-haul trip at least two hours before your plane is slated to depart, or three hours for trans Atlantic adventures. This gives you enough time to check your luggage in, tackle the queues in security, and browse for some duty-free gifts before jetting off. Some of us allow even more time, fretting that an extra hour is needed in case there is some kind of delay that