Flight that's a bit of a drag? (5,4)

I believe the answer is:

short haul

I'm a little stuck... Click here to teach me more about this clue!

But I can't explain it at all! Could you help me understand?

(Another definition for short haul that I've seen is " Relatively quick flight".)

I've seen this clue in The Sun.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.

Connecting...