From Wiktionary, the free dictionary
economy class
- The lowest tier of seating for travellers aboard aeroplanes and certain other kinds of public transportation.
- Synonym: (chiefly US) coach
1958 March 28, F. G. Swanborough, “Economy Over the Atlantic”, in The Aeroplane[1], volume 94, London: Temple Press Limited, page 413:In practice the introduction of economy class has presented difficulties, more especially for operators with small fleets.
