Winglets have become one of the most recognizable features of modern commercial aircraft. From narrowbody workhorses to long-haul widebodies, these vertical or angled extensions at the tips of wings are widely associated with improved fuel efficiency and lower emissions. Airlines promote them as part of their sustainability efforts, while manufacturers highlight their aerodynamic advantages.

So in this video, we take a look at how winglets work, how much fuel they really save, and whether they truly make the biggest difference on long-haul routes.