coach class
noun [ U ], adverb US uk/ˈkəʊtʃ ˌklɑːs/ us/ˈkoʊtʃ ˌklæs/ (also coach); (UK economy class)
乘坐（飞机）经济舱；乘坐（火车）普通车厢
(using) the cheapest type of seats on a plane or train
Traveling in coach class is not a great way to spend your time. 乘坐经济舱不是什么令人愉悦的经历。
Compare: first class