virtualbox.org

Hello,
We are working in a project where we setup virtual machines in Windows laptops to be sent to locations without Internet access,
however the process of exporting and importing of VMs of Virtual Box is quite slow so I was wondering if there is an easier way
to do this.

In contrast, doing the same with VMWare Player would require only a copy paste process.

Read "Moving a VM" and interpret it as "Copying a VM". Mind you that the VM that is copied is identical to the original and you might have activation issues in Windows guests, although I expect them to be less compared to the Export/Import procedure.