We consider past 100 feet as iffy with the standard gear. And any attempt with antennas are considered experimental and never to be talked about as if they will work.
If your router has antennas you can try the old method of a reflector. I wish folk would reveal exact models since I can't be sure this will apply. Tutorial follows.
PS. For distance I find 2.4GHz wins.
I have a condo just off the beach and my WIFI doesn't have the range to use it when on the beach. Its a clear site to the beach which is about 150 ft from my router in the condo. No walls between the router and beach but there is a glass door and glass wall. Any suggestions what would be best to extend the range? My current router is an "N" type.