Airline companies usually refer to coach and economy as one and the same. The only difference between the two is when they are used. Some would refer to the coach when referring to the actual cabin while people would use the term “economy” when you are purchasing your tickets in advance.
This means that a coach may refer to the actual seats that you can find in the economy class. There was a time when the coach was used to refer to lush accommodations for people who would like to travel via train but over the past years, the coach has been downgraded to look like the economy class accommodations.
Flying on an airplane can be both enjoyable and relaxing or problematic and annoying. It depends on where you sit and who you sit next to. Most people who fly first class or business class, really have it made. They get to board the airplane first, and then they have ample legroom.
Those who fly coach or economy must sit cramped three to a row and very little room to move. However, there is a difference between riding in a coach and riding in the economy. Coach is probably a little more expensive, but you get a bit better seat that has a bit of legroom. Economy seating is the cheapest and is located mostly in the back of the plane.