The Aero A.35 was a Czechoslovakian airliner of the 1920s and 1930s. Designed by Aero for long-range flight, with a transatlantic crossing in mind, it saw service with CSA although no such crossing was ever attempted. It first flew in 1929. A conventional high-wing monoplane, it was a very modern design for its day in all but one respect – the cockpit still had open sides. An extra passenger could also be accommodated here, beside the pilot.