United's new RJ-550 is the world's first and only 50-seat regional aircraft that offers first-class seats and amenities like: * Space for every customer to bring a roller bag on board. * A self-serve refreshment center for United First customers featuring a wide assortment of snacks and beverages. * More overall legroom per seat than any other 50-seat aircraft flown by a U.S. airline. * The ability to stay connected while in flight with United Wi-Fi. United is the world's first and only airline