The first steamship that made the transatlantic passage was the SS Savannah. It crossed the Atlantic Ocean using a combination of steam and sailing between May and June of 1819.
The first transatlantic passenger steamship to traverse the route regularly was the SS Great Western. It was the first ship built for scheduled commercial travel of the Atlantic route fully using steam power. It began work in 1838. Other ships that made the crossing using a combination of power sources included the Curacao and the Canadian ship the SS Royal William. The RMS Britannia began making regular crossings of the Atlantic with passengers in 1840. The first iron-hulled screw-driven ship to cross the Atlantic successfully was the SS Great Britain in 1847.