World's Longest Flight Will Fly Direct from London to Perth in 17 Hours By Notable Life By Notable LifeView Author|December 13, 2016|TravelView Travel How long do you think you could sit in an airplane before losing your mind entirely? If 17 hours doesn’t faze you, then you will soon be able to embark on the world’s longest commercial passenger flight. Aussie airline Qantas will... View this article.