It will include free booze (domestic and international), better snacks and dedicated overheard bin space. >Regular economy seating on Delta is split into two tiers: Main Cabin and Basic Economy. The Main Cabin is for travelers flying on most economy class fares. Delta’s Basic Economy is for those on unadorned fares of the same name, which the airline introduced two years ago to stay competitive with low-cost carriers, and has been expanding to more routes in recent months.