Napoleon, though a military genius and very charismatic, inspiring leader, was an epic idiot when it came to things involving navies, ships, logistics, supplies, etc. He underestimated the Russian winter as well as the rough Spanish terrain. He also thought that his admirals were making up silly excuses about not being able to go places, when they talked about the winds and tides.
Thank goodness the French fleet was destroyed by the British. His plan was to send his massive force across the rough Channel waters on flatboats and other tiny "ships", as well as through a few air balloons. If the French were not defeated at sea and had the opportunity to strike, Napoleon's invasion force most certainly would have sunk in the ocean. Napoleon would be a joke today. So no, Napoleon had no realistic chance at transporting his massive force to England through hot air balloons. Unless he wanted to attack England as ghosts, it would have ended in disaster.