Usually, an aircraft consists of First Class, Business Class and Economy Class. However, some selected airlines also have Premium Economy Class. There are airlines using particular names to refer these travel classes.
First Class: The First Class cabin consists of the fewest number of seats with lots of space. Equipped with modern amenities, it offers ultra comfort and luxury travel experience. The First Class travelers enjoy several facilities such as priority check-in, airport lounge access, free additional baggage allowance, etc. This travel class is the most expensive in the air travel industry.
Business Class: The Business Class cabin consists of roomier seats with extra leg room and special meal availability. Business Class travelers enjoy some of the facilities offered to First Class travelers. Business Class travel is less expensive than travel in the First Class.
Economy Class: Economy Class is the most spacious and least expensive cabin of aircraft with the highest number of seats. Availability of inflight amenities and services for Economy Class travelers depends on airlines.
Premium Economy Class: Premium Economy Class is scaled between economy and business class based on comfort, amenities and price. There is extra legroom of 5-7 inches, extra seat width of 1-2 inches, extra seat recline of 2-3 inches along with adjustable leg rests, headrests and lumbar support.