Long haul business class seats are substantially different from economy class seats and many airlines have installed "lie flat" seats into business class, whereas previously seats with such a recline were only available in international first class. There are essentially three types of long haul business class seats today. These are listed in ascending order of perceived "quality".

Business class has started to disappear from some short/medium haul routes, to be replaced with full fare economy and discount economy (KLM and SAS). On these routes, the seats are the same for all passengers, only the flexibility of the ticket and the food and beverage service differs. On shorter routes (typically less than one hour) many airlines have removed business class entirely (e.g. BMI on many routes) and offer only one class of service.

Both United Airlines and Trans World Airlines experimented with a similar three-class concept in 1978, but abandoned it due to negative reactions from discount economy class travelers who felt that amenities were being taken away from them. United also cited the difficulty of tracking which passengers should be seated in which section of the economy cabin on connecting flights. American Airlines also began separating full-fare economy passengers from discounted economy passengers in 1978, and offered open middle seats for full-fare passengers.