I'm very sorry I got home so late.
I'm very sorry that I came home so late.
I'm very sorry I came home so late.
I'm very sorry I got home so late.
I am sorry to be so late.
I am sorry for going to your house late.
I was almost late.
I am terribly sorry that my expression of gratitude is delayed.
I am terribly sorry for guiding you late.
I am terribly sorry about responding so late.
I am sorry to leave so soon.
I'm very sorry for my slow response.
I'm really sorry that my response is late.
I am terribly sorry for the delay in my reply.
I was (called [put]) on the carpet for being late.