格安かくやす
kakuyasu

Noun
na-Adjective
no-Adjective

1. (very) cheap; (very) inexpensive; cut-price; bargain (price)

なんにちまえまでに予約よやくすれば格安かくやす料金りょうきん対象たいしょうになりますか。
nannichi maemadeni yoyaku sureba kakuyasuryōkinno taishōni narimasuka.
How early do I have to make a reservation to qualify for the discount?