Lifehacker: Find the WiFi Password For Almost Any Airport Lounge Using This Free Map. “Fortunately, we’re at a point where most of the airports in the United States offer free WiFi in some form. Yes, sometimes you have to watch an ad to get there, but it’s there. That said, sometimes you end up an airport that doesn’t have WiFi, or one that has free WiFi that’s restricted by a time limit. For times like those, the WiFox Google Map can help.” Just make sure you’re using a VPN!