A special edition matchday programme, a pin badge as well as a commemorative book on the disaster - which killed 23 including eight United players - were left in special packs on seats at Old Trafford.
Prior to their arrival in Munich, Manchester United had been in Belgrade, where they played out a 3-3 draw in the second leg of their European Cup quarter-final against Red Star that ensured passage through to the tournament's semi-finals.
Snow fell while fans queued outside Old Trafford and throughout the service and renditions of the hymn "Abide with me" and club chant 'We'll never die, ' sung by the first team wearing club suits and Munich badges, standing beside former manager Sir Alex Ferguson, who paid tribute to the Babes.
"I was thinking how great they were, it will never ever stay out of my mind".
There were also representatives from Sheffield Wednesday, United's first opponents after the incident, and Bishop Auckland, who loaned players to the club in the aftermath.
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The tragedy in Munich is ingrained into the heart and soul of Manchester United.
The service is set to commence at 2.40pm, with a minute's silence at 3.04pm to the mark the time of the disaster.
Busby was twice read his Last Rites while gravely injured in a Munich hospital - before making a miraculous recovery and leading a young team nicknamed "Busby Babes" club to European Cup glory just ten years later. I played, and at one point Liam gave me a lovely pass that meant I couldn't miss.
Manchester United star Jesse Lingard has apologised for "any upset caused" after a tweet was mistakenly sent from his account during Tuesday's Munich air disaster memorial service. "The passion, determination and courage shown by the club to carry on in those awful moments have left an indelible mark forever".
Determined to keep the spirit of the original Busby Babes alive, survivors Charlton and defender Bill Foulkes had a new team formed around them, developed under the guise of their returning coach, Busby.