How long does the cream in a freshly baked chicken pie last for?
(I am assuming the pie essentially contains chicken broth, either as an ingredient, or from cooking the chicken in the filling, and basing the hold time on that as the likely most perishable ingredient in the pie...)

Such a pie will be safe for two to three days (possibly more, but I like to treat safety conservatively....)

However, if you have a bottom crust, it will likely get quite soggy over that period of time.

If you need to prepare your pie ahead, it might be better from a quality perspective to prepare the filling stove top separately from the crust, and blind bake the crust.  Then on the night of service, you can combine the two and bake to heat through and crisp up the crust.  This will almost certainly give you a better product than making the pie fully in advance.