He wasn`t the first to fly across the Atlantic but he managed to set a few records. Besides, he was wearing a formal suit because he said: if I drown and they find me, at least I will look decent.
en.wikipedia.org/wiki/Stanis%C5%82aw_Skar%C5%BCy%C5%84ski Transatlantic flight On 7/8 May 1933 Skarzynski flew solo in a small single-seater Polish tourist airplane RWD-5bis (SP-AJU) across the southern Atlantic, from Saint-Louis, Senegal to Maceio in Brazil. The flight took 20 hours 30 minutes (17 hours 15 minutes above the ocean). He crossed 3,582 km, establishing a distance World Record in a FAI tourist plane category II (weight below 450 kg / 1000 lb). The plane had no radio nor safety equipment, due to weight restrictions. The RWD-5bis remains the smallest plane to ever to have flown across the Atlantic. Plans of his flight were kept secret. It became a part of Warsaw – Rio de Janeiro flight, between 27 April and 10 May 17,885 km long. He then flew on to Buenos Aires and returned to Europe by ship.