From Longman Dictionary of Contemporary Englisheconomy classeˈconomy ˌclass noun [uncountable] TTAthe cheapest type of seats in a plane —economy class adverb We flew economy class.
Examples from the Corpus
economy class• To his senior executives' chagrin, Mr McGovern always flies economy class and is proud of it.• Flying economy class can kill you, and business class isn't much better.• Even at his best, he looks as if he has just stepped out of economy class after a flight from Bangkok. 