Question: Which airport is located on an island, Wilmington International Airport or Ketchikan International Airport?
Sentence (from "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 the U.S. state of Alaska which has no direct road access to the outside world nor to the airport.
Relevant evidence: Yes