Billy Gilbert's final film.

The book Five Weeks in a Balloon by Jules Verne was in the public domain, and two producers raced to complete film versions of the novel. Flight of the Lost Balloon (1961) premiered on December 28, 1961, eight months before Five Weeks in a Balloon was released on August 22, 1962.

Peter Lorre appeared in three films based on novels by Jules Verne: 20,000 Leagues Under the Sea (1954), Around the World in 80 Days (1956), and Five Weeks in a Balloon. Cedric Hardwicke appeared in two, Around the World in 80 Days (1956) and Five weeks in a Balloon.