LZ 129 Hindenburg (Luftschiff Zeppelin #129; Registration: D-LZ 129) was a large German commercial passenger-carrying rigid airship, the lead ship of the Hindenburg class, the longest class of flying machine and the largest airship by envelope volume. It took 23 days and six stops.

The first Pan Am trans-Atlantic flight in 1939, aboard a Boeing 314 seaplane, went from Newfoundland to Ireland, according to Wikipedia, which notes that by 1947 commercial … American Export became the world's first airline to offer regularly scheduled landplane (as opposed to seaplane) commercial flights across the North Atlantic. Although it was not the first commercial jetliner in service, the 707 was the first to be widespread and is often credited with beginning the Jet Age. Later that year, a British Vickers Vimy piloted by Alcock and Brown made the first non-stop transatlantic flight from Newfoundland to Ireland. The wager from the Daily Mail. Transatlantic flight surpassed ocean liners as the predominant mode of crossing the Atlantic in the mid 20th century. 4 October 1958 – The first regularly scheduled transatlantic passenger service with jet powered aircraft began when two British Overseas Airways Corporation (BOAC) de Havilland DH.106 Comet 4 airliners, civil registrations G-APDB and G-APDC, left nearly simultaneously from London Heathrow Airport (LHR) to Idlewild Airport (IDL), New York, and from New York to London. It dominated passenger air transport in the 1960s and remained common through the 1970s, on domestic, transcontinental, and transatlantic flights, as well In May of 1919, the Curtiss seaplane NC-4 made the journey from the United States to New Foundland then to the Portuguese Azores before landing in Portugal and the United Kingdom. Photo: Daily Mail.
In 1919, the American NC-4 became the first airplane to cross the Atlantic (but in multiple stages).