Antonio B. Won Pat International Airport


August 20, 2022

Antonio B. Won Pat International Airport (IATA: GUM, ICAO: PGUM) is located in Tamuning, about 9.6 km northeast of Hagatna, the capital of American Guam. Also known as Agana International Airport.


It opened as an airfield for the Air Force in 1944 and opened to civilians in 1982, and passenger transport began. It was named after Antonio Borgia Won Pat, a native of Guam who was the first delegate to the US House of Representatives. It is used as a hub for United Airlines.

Customs, Immigration

Security screening of arriving passengers is conducted by Customs and Border Protection (Immigration Only) and Guam Customs and Quarantine Administration. Security screening of departing passengers is conducted by the Transportation Safety Administration.


As Guam is outside the jurisdiction of U.S. Customs, customs screening of passengers arriving in Guam is conducted by the Guam Customs and Quarantine Administration. Only passengers transiting to Honolulu, the only destination for the United States, are subject to US Customs and Border Protection.

Immigration check

The United States Customs and Border Protection screens all passengers arriving from foreign territories. Passengers departing from the Northern Mariana Islands, which have separate visa requirements from the continental United States, are pre-screened before boarding a flight to Guam. Passengers on direct flights to Honolulu are checked for eligibility to enter the United States at the boarding gate of the aircraft. Visa waiver systems for Guam and the Northern Mariana Islands include Nauru, New Zealand, Taiwan (only those registered in Australia), South Korea, Malaysia, Brunei, Singapore, This is because it allows visa-free entry to travelers from the UK, Japan, China, Papua New Guinea, Australia and Hong Kong (Hong Kong ID required). U.S. citizens do not need a passport to enter Guam from the Northern Mariana Islands, and other forms of identification may be used for entry. A passport is required for U.S. citizens traveling from third countries to the United States and Guam. All passengers, except those departing for Honolulu and the Northern Mariana Islands, are subject to U.S. Customs and Border Protection before going to the gate. All departing flights are subject to Guam's customs jurisdiction, so there is no need to resend your baggage.

Security Check

All departing and transit passengers are subject to security screening by the Transportation Safety Administration. Passengers transiting through Guam from the mainland United States or the Northern Mariana Islands are not subject to security screening in Guam as they have already undergone security screening by the Transportation Security Administration at the point of departure. Passengers transiting through Honolulu from Guam will have to go through security screening again by the Transportation Security Administration as baggage from Honolulu goes through inspection by the U.S. Customs and Border Protection.



The first construction of the currently used passenger terminal was completed on September 10, 1996. The 550,000-square-foot (51,000-square-meter) terminal included a new Customs/Immigration Hall and a 710-car car park. Phase 2 of the construction was completed in 1998, and the cost of completing the terminal was 7.41 million US dollars. The terminal is a three-story building, with arrival facilities on the first floor (including customs and baggage collection facilities). On the first floor, there is also an airport police force, entertainment facilities, and Hapa Adai Park. Airline counters exist on the departures floor, and gates, immigration control facilities, and airport offices are located on the 3rd floor. All arriving and departing aircraft must go through customs or immigration procedures, so the area beyond the airport security checkpoint is Departure passengers are not separated. the only