Complex sentence: Lindbergh was the 19th person to make a Transatlantic flight, the first being the Transatlantic flight of Alcock and Brown from Newfoundland in 1919, but Lindbergh's flight was almost twice the distance.
Split into simpler sentences: Lindbergh was the 19th person to make a Transatlantic flight, the first being the Transatlantic flight of Alcock and Brown from Newfoundland in 1919. But Lindbergh's flight was almost twice the distance.