[Grammar] ‘at home’ question

[northpath]

Is it possible to omit the preposition ‘at’ in the phrase ‘at home’ or there are some limitations? For instance:
1. My wife should be at home now.
2. I’ll be at home at 6.
3. We spent last weekend at home.
I mean
1. My wife should be home now.
2. I’ll be home at 6.
3. We spent last weekend home.

 

[Rover_KE]

Only the second #3 is not common in BrE. It might be used in AmE.

 

[GoesStation]

It isn't.