https://en.wikipedia.org/wiki/Ketchikan_International_Airport
Ketchikan International Airport (IATA: KTN, ICAO: PAKT, FAA LID: KTN) is a state-owned, public-use airport located one nautical mile (2 km) west of the central business district of Ketchikan, a city in Ketchikan Gateway Borough in Alaska that has no direct road access to the outside world or to the airport.[1] The airport is located on Gravina Island, just west of Ketchikan on the other side of the Tongass Narrows. Passengers must take a seven-minute[2] ferry ride across the water to get to the airport from the town.
As per Federal Aviation Administration records, the airport had 108,837 passenger boardings (enplanements) in calendar year 2008,[3] 96,996 enplanements in 2009, and 100,138 in 2010.[4] It is included in the National Plan of Integrated Airport Systems for 2015-2019, which categorized it as a primary commercial service (nonhub) airport (more than 10,000 enplanements per year) based on 103,136 enplanements in 2012.[5]