noun
economy class
Refers to the lowest-priced class of travel on an airplane, train, or other transport.
エコノミークラスの席は少し狭いです。
Economy class seats are a bit cramped.
予算の都合でエコノミークラスを予約した。
I booked economy class due to my budget.
Alternate spelling with a middle dot; less common but still seen.
Borrowed from English 'economy class'.