Finding Frankie’s On Butterfield RoadRight at 17W626 Butterfield Rd in Oakbrook Terrace, Frankie’s Deli sits in an easy-to-reach spot in the western suburbs of Chicago. One longtime regular mentioned enjoying the sub sandwiches for over four decades, which is a streak most eateries can only dream about. Sub Sandwiches Worth Standing In Line ForLet’s get to the heart of it: the sandwiches. Still, the overall sentiment leans strongly positive, and the sub sandwiches remain the reason so many people keep coming back. But for Illinois families, couples, and day-trippers hunting for an easy, affordable, brag-worthy bite, Frankie’s Deli delivers.