A handy reminder of why flight search is Hard with a capital H: http://www.demarcken.org/carl/papers/ITA-software-travel-complexity/img0.html http://www.demarc

A handy reminder of why flight search is Hard with a capital H: http://www.demarcken.org/carl/papers/ITA-software-travel-complexity/img0.html http://www.demarcken.org/carl/papers/ITA-software-travel-com... (ITA being the company purchased by Google)