On June 5, 1783 they used fire to inflate a spherical balloon about 30 feet in diameter that traveled about a mile and one half before it came back to earth.
Yes they were first to fly the first hot air balloon
The Montgolfier Brother's flew the first hot air balloon.
They invented the first hot air balloon in France. The first flight of the hot air balloon was conducted in Bois de Boulogne in Paris
Until The Pilot Of The Balloon Cannot Breathe And Must Bring The Balloon Down Due To Lack Of Oxygen.