Portland International Airport launches largest free airport Wi-Fi network--in the world? PDX breaks with the usual habit of charging fees, sometimes higher than those in hotels, for airport Wi-Fi. The service covers about 70 percent of the airport, and will be free for at least the first year. The project has a single T-1 on the back end through XO Communications at present. I'm unaware of any other airport of this scale offering free service in the U.S.--or anywhere in the world. The airport sees over a million passengers (counting in and out) per month.