As it approaches Irving, NY 438 becomes Irving–Gowanda Road, named for the communities at each terminus. The route heads northwest across undeveloped but level terrain, crossing over the New York State Thruway (Interstate 90) without connecting to the highway. NY 438 comes to an end shortly afterward at a junction with US 20 and NY 5 northeast of Irving in the town of Brant. Access to the Thruway is made via exit 58, located a mile (1.6 km) to the southwest on US 20 and NY 5 in Irving, a hamlet in the adjacent Chautauqua County town of Hanover.