Antonio B. Won Pat International Airport (IATA: GUM, ICAO: PGUM) is the primary international airport serving Guam, a United States territory in the western Pacific Ocean. The airport is located in Tamuning, approximately 5 kilometres (3 miles) east of Hagåtña, the capital, and just 5–10 minutes by car from the Tumon hotel strip.
The airport opened its current international air terminal in January 1982 and was renamed in 1989 in honour of Antonio B. Won Pat, Guam’s first elected Delegate to the U.S. House of Representatives. It is the only civilian commercial airport on Guam and serves as the primary gateway between the island and destinations across Asia, the Pacific, and the United States mainland.
GUM is a hub for United Airlines, which operates extensive services connecting Guam with Japan, South Korea, the Philippines, and the U.S. mainland. The airport handled 1,927,462 passenger movements in Fiscal Year 2024, well below its pre-pandemic peak of 3.8 million passengers recorded in 2019. Air service recovery has been gradual, with new routes added in 2025 including T’way Air’s Osaka–Guam service, Air Seoul’s Seoul–Guam route, and Air Busan’s Busan–Guam service.
The airport operates a single passenger terminal of approximately 768,000 square feet, divided into arrivals on the ground level and departures on the apron level. The terminal underwent significant infrastructure improvements following Typhoon Mawar, including a $21.4 million FAA grant to replace the entire main terminal roof and install approximately 1.6 megawatts of solar power generation.