How many missions in the game "Halo: Reach" am I forced to do solo?

[Kal-El]

I'm not talking about co-op play. I'm referring to when I won't be able to fight along side my squad.

 

[Michael Peck]

probulary 1-3 missions

 

[Ryan Flaherty]

there is only one mission where you will be absolutely alone from begining to end. that mission is lone wolf, the last mission. at the end of the pillar of autumn you must fend off the covenant by yourself but that is for a very short period of time. very rarely will the whole noble team be together but for a good majority of the time you will never be alone. hope this helped