stare into space
stare off
stare off into space

Many people sat on the side of the road staring into space.

And the guy asked me what I was doing staring into space.

He sat around the house saying nothing, staring into space.

No good would have come from your simply staring into space.

I just stared into space as the board kept me waiting for eight hours.

We sat far away from them and stared into space.

Some seemed beyond everything, staring into space with dead eyes.

Just sitting in one room or another, staring into space.

He put the book down and sat staring into space.

The rest of the time she was staring into space.

She stared into space, as if trying to make up her mind about something.

He's been sitting around in the living room, just staring into space, not saying much.

He seemed to look past her am stare into space.

But when we're alone, we don't just sit staring into space until another human comes.

He looked at her, and realized she was still staring into space.

She stared into space as if trying to remember a dream.

All she could do was sit in a chair, staring into space.

She stared into space as the memory came back to her.

She sat up straight and stared into space, her eyes wide.

It's not right for you to just sit and stare into space.

I had been staring into space for over two hours, thinking of my present position, asking myself questions.

I'd be at a dinner party and would stare into space for up to 15 minutes.

He was silent for a long time, staring into space.