depends on where u wanna go, right?
cheapest - KL?
u can go to places like HK...but seriously, 1 day is not enuf.
unless ur going for the kix of it. anyway, its fun! just a 1 day
trip...fly n come back.
try it. but i hope ur planning is gd...otherwise, its defi gonna be
more of a 1 day/nite trip 
have fun.
PS: anyway, dun need to reply me over the PM. have replied u
here.