What is Passenger facility charge?

A passenger facility charge is a fee that almost all airline travelers in the United States pay in their ticket price. The fee goes toward the upkeep and maintenance of airports, and is setup and capped according to US federal law.

The law allows airports to charge up to $4.50 for every enplaned passenger at public agency-controlled commercial airports. Airports must use the money from the fees to pay for projects approved by the Federal Aviation Administration that, according to the FAA, "enhance safety, security, or capacity; reduce noise; or increase air carrier competition."