You're the only passenger this run, so you get more space.
He was the only passenger in the car, and no other vehicles were involved.
The six of them were the only passengers left on board.
He'd not seen their only remaining human passenger over the past week.
The only passengers at this time of the year were island residents and their friends.
After all, he would be the vessel's only passenger, and what else were they going to do with him?
He was the only passenger who came on board in the dead of the night?
The only other passenger on the plane was a member of her staff.
And they all had to be crew members, because I was the only passenger.
The only other remaining passenger in my car was leaving.