British aviators John Alcock (1892 - 1919 ) and Arthur Brown (1886 - 1948 ) made the first non-stop transatlantic flight in June 1919. They flew a modified First World War Vickers Vimy bomber from St. John's, Newfoundland, to Clifden, Connemara, County Galway, Ireland. The Secretary of State for Air, Winston Churchill, presented them with the Daily Mail prize for the first crossing of the Atlantic Ocean by aeroplane in "less than 72 consecutive hours." A small amount of mail was carried on the flight, making it the first transatlantic airmail flight. The two aviators were awarded the honour of Knight Commander of the Most Excellent Order of the British Empire (KBE) a week later by King George V at Windsor Castle.

In April 1913, the London newspaper the Daily Mail offered a prize of £10,000 "to the aviator who shall first cross the Atlantic in an aeroplane in flight from any point in the United States of America, Canada or Newfoundland to any point in Great Britain or Ireland in 72 continuous hours".

The competition was suspended with the outbreak of war in 1914 but reopened after Armistice was declared in 1918.

More Info: en.wikipedia.org