最近は、航空券の格安チケットも仕組みが複雑すぎて、わかりにくいことが多い。

tbd

Lately the discount airline ticket system has gotten so complicated that there's a lot about it I can't figure out.

何日前までに予約すれば格安料金の対象になりますか。

tbd

How early do I have to make a reservation to qualify for the discount?