The Scotsman has had a tough start to his new job by losing three of United's first Premier League fixtures, leaving them 12th in the table, eight points adrift of leaders Arsenal.
"David Moyes will be okay as Manchester United manager," Saha told talkSPORT. "Transitions are always difficult, you have to adapt and you have to make sure the team are taking on your ideas.
"He's got a great bunch of lads there, though. They are quality players so it's only a matter of time before everything comes good."
Moyes witnessed his side secure a point in their Champions League campaign last night by drawing 1-1 with Shakhtar Donetsk.