From VG247: "Remember when Fortnite didn’t have any vehicles at all? Now you can literally fly! Take to the skies in an X-4 Stormwing with this list of every plane location we’ve found in Fortnite so far.
Flying a plane is one of the Season 7 Week 4 Fortnite challenges, where you need to hop in an X-4 in five different matches. It’s also handy for the Week 7 challenge where you’ll need to hunt for and shoot down X-4 Stormwings."