If you are downloading 1809 for legacy hardware or testing, be aware of its history.
Download LAN/Wi-Fi drivers on another PC and transfer via USB. Version 1809 may not include drivers for very new hardware (post-2020). windows 10 pro version 1809 64bit iso download top
If you manage to find the direct link structure, it usually looks like this (note: links expire and rotate): If you are downloading 1809 for legacy hardware