Although Zaha joined the Old Trafford outfit in January, in the process becoming Sir Alex Ferguson's last signing as Red Devils boss, he spent the remainder of the season on loan back with his previous club Crystal Palace.
It meant when he linked up with his team-mates for their current tour to the Far East and Australia he did not really know what to expect.
But after three days in Bangkok, Zaha is now acutely aware of how big United are.
"It's my first time on a tour like this," he told MUTV.
"I'm not used to it. To have so many fans coming to watch a pre-season game is different."
The England Under-21 star is making a positive impression though.
He might only have featured for the final half-hour of yesterday's surprise defeat by the Singha All Stars but he was one of the better players on view and came closest to grabbing an equaliser for the Old Trafford outfit when he smacked a shot against the post.
"I really just put my head down and tried to connect with the ball properly," he said.
"It would have been a different story if it had gone in.
"I'm glad I had a go and it would have been a great day for me if I'd scored one. But it doesn't matter now.
"Just knowing I was on the pitch with Rio (Ferdinand), Ryan Giggs and Anderson was good enough for me."
United flew straight out of Bangkok in the early hours of the morning and have now reached Sydney, where they will spend a week before facing the A-League All Stars in the second game of their five-match tour on Saturday.