Thru October 31, Del Taco has a range of offers thru the Rewards app (free to join). For National Taco Day (Oct 6), get a free taco with purchase. Then, avail of a series of “buy one get one free” options, each available for several days: Carnitas Big Fat Taco (Oct 7-10), Crispy Chicken Taco (Oct 14-17), Grilled Chicken Taco (Oct 21-24), and The Del Taco (Oct 28-31). Shop Now at Del Taco