What is the drag induced by a high bypass jet engine on an airliner?
What you are asking about is inlet performance.

Instead of sucking air, think of it as eating air, that's a better more correct analogy (like Pac-Man eating dots). As the plane flies through the air, it may literally bite off more than it can chew. Causing spillage. The extra air stuck in the inlet tries (but fails) to go out. Creating drag.

But this drag for the subsonic airliners you ask about is offset by the suction at the inlet due to the inlet's design.

See here for how they cancel each other: How does inlet spillage drag produce a lip suction effect?



Related: Does the air resistance of a jet engine air intake count towards the jet&#39;s total air resistance?