How long will it take to go through the mantle?

I'm just curious, could you please elaborate on the time frame involved in traversing the mantle? I've heard various estimations, but I'm looking for a more precise understanding. Is it a matter of hours, days, or perhaps even weeks? What factors determine the duration of this process? Are there any unexpected delays that could potentially arise? I'm really interested in getting a clear picture of this, so any additional information you could provide would be greatly appreciated.