A direct flight can still land before reaching your destination.

The difference is what happens between takeoff and arrival

A nonstop flight travels from its origin to its destination without landing anywhere in between. A direct flight keeps the same flight number from origin to destination, but it may land at an intermediate airport. The plane might take on passengers or refuel before continuing; the stop does not necessarily mean you change aircraft.

That distinction comes from how airlines label and operate trips, not from a guarantee that a direct flight will be uninterrupted. A flight number identifies a scheduled service. It is not a promise that the aircraft will fly straight through.

Why a stop can matter to your itinerary

On a direct flight with a stop, passengers may stay aboard, leave the plane briefly, or—in some cases—be asked to switch aircraft. What happens depends on the airline and the specific itinerary. The stop can add time on the ground, and passengers continuing to the final destination may need to follow instructions for remaining on the aircraft or reboarding.

So compare the itinerary details, not just the label. Check the listed stops and total travel time, and ask the airline whether you will change planes if that is important to you. A direct flight can still be a convenient option, but only “nonstop” tells you there is no intermediate landing.