MS 19 now leaves Philadelphia and travels through another portion of the Mississippi Band of Choctaw Indians Reservation, where it passes through the community of Choctaw and crosses the Pearl River, before curving to the northwest to have an intersection with MS 395 in Arlington and enter some hilly terrain as it briefly crosses into the southwestern-most corner of Winston County, where it has an interchange with MS 25.
MS 19 now travels through a portion of the Mississippi Band of Choctaw Indians Reservation, passing by the town of Choctaw and crossing the Pearl River before turning northwest to intersect with MS 395 in Arlington and enter hilly terrain as it briefly enters Winston County, where it has an interchange with MS 25.