Coach/Economy class seating can be found in all airplanes. In addition to them many flights also offer Business seating and First Class seating, and their descriptions can be mentioned as under:
Coach/Economy class seating is the one in the main cabin area and is usually the least expensive option. Business class seating whenever available tends to feature seats with additional seating space that can recline farther, with more leg room, and also upgraded meal service. Business class tickets cost way more than Economy Class ones but less than First Class tickets. First class seating is usually based nearest to the aircraft front. It has the fewest and also the most comfortable seats, and gives all its occupants access to upgraded meals. Other perks include shorter lines at check-in, use of airline's business lounge at the airport, and more. First Class fares are always the most expensive and aren’t available on all aircrafts.