Sugar Ray’s Mark McGrath might be re-thinking his all around the world status … ’cause he got mooned on his recent flight!

The singer posted about the strange experience on his Instagram Story … explaining he was on a flight from London to Dallas, Texas and got quite the view — another person’s butt crack!

He said the passenger was even woken up as he unknowingly mooned the entire flight … and according to Mark, “gave zero f**ks.”

Well, that’s surely a flight Mark won’t forget … though he may want to.

It’s not clear when the flight took place, ’cause on Saturday, he appeared at The LADYWORLD festival in Florida.