There are many different players involved, and all need to collaborate seamlessly. When someone wants to travel, they need to deal with airlines, book hotels, find activities, navigate airports and maybe rent a car. They will also have to change their currency so they can shop at their destination. The hoteliers and airlines also need to collaborate (and compete). Besides running their own website and reservation systems, most of them have found it necessary to collaborate with Global Distribution Systems (GDSs) and Online Travel Agencies (OTAs) to land on more “supermarket shelves” globally. Running these systems adds to the costs on the end customers, but there are also many other hidden fees involved. Get the full story at Forbes