There are airplanes that can fly for a really long time without stopping, and they're called endurance UAVs. UAV stands for unmanned aerial vehicle, which means that they don't have a pilot inside like most planes. Instead, they're flown using special computers and controllers by people on the ground who can see the plane through cameras on it.
Modern US endurance UAVs are really special because they can stay in the air for days at a time! They have special engines and lots of fuel so they can keep flying for a really long time without needing to land. They're also designed to be able to do all kinds of different tasks, like taking pictures of the ground or monitoring weather patterns or even watching out for bad guys!
These planes are really important because they can go places and see things that would be hard or dangerous for people to get to. Plus, they can stay up in the air for so long that they can keep doing their jobs even when other airplanes can't. So even though they look kind of like regular planes, they're actually really special and important!