(it's) time to hit the road

It is time to leave. Time to hit the road, Tom. We don't want to miss our flight. A: "Would you like any dessert?" B: "No, thank you. I think it's about time to hit the road."

(It's) time to hit the road.

and (I'd) better hit the road.; (I've) got to hit the road.

Inf. Fig. a phrase indicating that it is time that one departed. (See also (I) have to shove off and (It's) time to run for other possible variations.) Henry: Look at the clock. It's past midnight. It's time to hit the road. Andy: Yeah. We've got to go. Sue: Okay, good night. Bill: I've got to hit the road. I have a long day tomorrow. Mary: Okay, good night. Bill: Bye, Mary.