The 'best' way to do this, is building it as a package. You can then distribute and install it to any Ubuntu machine running the same (major) version.
For building vanilla kernels from source, there's a tool
make-kpkg which can build the kernel as packages. Other major advantages: easy reverting by just removing the package, automatic triggers by the package management such as rebuilding DKMS, etc.
The Ubuntu community wiki on Kernel/Compile Alternate Build Method provides a few steps on how to do that.
Basically, it's just the same as building the kernel from upstream documentation, but instead of having
make blindly installing it on your system, have it build in a 'fake root' environment and make a package out of it, using
fakeroot make-kpkg --initrd --append-to-version=-some-string-here \
This should produce binary
.deb files which you will be able to transfer to other machines and install it using
dpkg -i mykernelfile-image.deb mykernelfile-headers.deb ...