Question: Which airport serves a larger metropolitan area, Williamsport Regional Airport or McCarran International Airport?

Context paragraphs:
Williamsport Regional Airport: Williamsport Regional Airport (IATA: IPT, ICAO: KIPT, FAA LID: IPT) is the primary public towered commercial airport that serves Williamsport, Pennsylvania and the surrounding Lycoming County area and serves about 25,000 annual passengers.

Juanda International Airport: Juanda International Airport (JIA) (Indonesian: "Bandar Udara Internasional Juanda" ) (IATA: SUB, ICAO: WARR) , is an international airport located in Sedati, Sidoarjo and one of the major airports of Indonesia.  This airport is located approximately 12 kilometers (8 miles) from Surabaya and serves the Gerbangkertosusila, the metropolitan area of Surabaya plus extended urban area.  Juanda International Airport is operated by PT Angkasa Pura I.  The airport takes its name after Djuanda Kartawidjaja, the last Prime Minister of Indonesia who had suggested development of this airport.  Juanda International Airport is one of the busiest airports in Indonesia, based on the aircraft movements and passenger movements.  In 2010, the airport handled 11 million passengers, although the capacity was 6 million passengers and the Air Traffic Controller radar system is only able to track 21 aircraft per hour, but at peak hour handled 40 to 45 aircraft landing and taking off.  In 2013, the airport serves about 400 aircraft per day.

Ministro Pistarini International Airport: Ministro Pistarini International Airport (Spanish: "Aeropuerto Internacional Ministro Pistarini" ) (IATA: EZE, ICAO: SAEZ) , known as Ezeiza International Airport owing to its location in the Ezeiza Partido in Greater Buenos Aires, is an international airport 22 km south-southwest of the Autonomous City of Buenos Aires, the capital city of Argentina.  It is the country's largest international airport by number of passengers handled—85% of international traffic—and is a hub for international flights of Aerolíneas Argentinas and LATAM Argentina.  Aerolineas Argentinas and its subsidiary Austral Lineas Aereas do operate limited domestic or "cabotaje" air service from Pistarini Airport as well.  Covering 3,475 hectares (13.42 sq mi; 8,590 acres), the airport serves Buenos Aires and its metropolitan area.  It has been operated by "Aeropuertos Argentina 2000 S.A." since 1998.

Southwest Airlines Flight 1248: Southwest Airlines Flight 1248 (WN1248, SWA1248) was a scheduled passenger flight from Baltimore-Washington International Airport, in Baltimore, Maryland, to Chicago Midway International Airport, in Chicago, Illinois, to Salt Lake City International Airport in Salt Lake City, Utah, and then to McCarran International Airport in Las Vegas, Nevada.  On December 8, 2005, the airplane slid off a runway at Chicago-Midway while landing in a snowstorm and crashed into automobile traffic, killing six-year-old Joshua Woods.  This is the first, and so far, only accident involving Southwest Airlines to result in a fatality.  It is also the first accident involving the airline to result in the death of someone not on the plane itself.

Champion Air: Champion Air was an airline based in Bloomington, Minnesota, USA.  It operated general charter services to sports teams, vacation wholesalers and government agencies.  It also offered limited scheduled service.  Its main base was Minneapolis-Saint Paul International Airport, with hubs at Denver International Airport, Dallas-Fort Worth International Airport, Detroit Metropolitan Wayne County Airport, McCarran International Airport in Las Vegas, Lambert-St.  Louis International Airport, and Will Rogers World Airport in Oklahoma City.  The airline ceased all operations on May 31, 2008.  Until its shutdown, the airline was a prime contractor for the Justice Prisoner and Alien Transportation System.

Montoursville, Pennsylvania: Montoursville is a borough in Lycoming County, Pennsylvania, in the United States.  As of the 2000 census, the borough population was 4,777.  It is part of the Williamsport, Pennsylvania Metropolitan Statistical Area.  The Williamsport Regional Airport is located in Montoursville.

McCarran International Airport: McCarran International Airport (IATA: LAS, ICAO: KLAS, FAA LID: LAS) is the primary commercial airport serving the Las Vegas Valley, a major metropolitan area in the U.S. state of Nevada.  It is located in Paradise, about 5 mi south of Downtown Las Vegas.  The airport is owned by Clark County and operated by the Clark County Department of Aviation.  It is named after the late U.S. Senator Pat McCarran, a member of the Democratic Party who contributed to the development of aviation both in Las Vegas and on a national scale.

McCarran Airport Connector: The McCarran Airport Connector (MAC) is a limited-access roadway system located in Paradise, an unincorporated town in the Las Vegas Valley, Clark County, Nevada, United States.  Composed of State Route 171 (SR 171), the Airport Tunnel, and arterial streets, the airport connector provides vehicular access to the passenger terminals at McCarran International Airport.

Ivanpah Valley Airport: Ivanpah Valley Airport is a planned relief airport for McCarran International Airport in the Las Vegas metropolitan area, to be located in the Ivanpah Valley of the Mojave Desert, within Clark County, Nevada.

IPT135: IPT135 Aircraft Charter Service is a charter company based at Williamsport Regional Airport in Williamsport, Pennsylvania. .  The company offers chartered flights to airports in the United States, Canada and the Caribbean.  Most flights depart from the regional airport in Williamsport, Pennsylvania.

Supporting paragraphs: Williamsport Regional Airport McCarran International Airport
Answer: McCarran International Airport