Port Alsworth Airport is a private-use airport serving Port Alsworth which is located in the Lake and Peninsula Borough of the U.S. state of Alaska. As per Federal Aviation Administration records, the airport had 1,938 passenger boardings (enplanements) in calendar year 2008, an increase of 2,592% from the 72 enplanements in 2007. Although many U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned TPO by the FAA and PTA by the IATA.