Greensboro Piedmont Triad International Airport (GSO) is a public airport located in Greensboro, North Carolina, United States. It is owned and operated by the Piedmont Triad Airport Authority and serves the cities of Greensboro, Winston-Salem, and High Point. The airport was originally established in 1927 as the Greensboro Municipal Airport, and it was renamed to its current name in 1987 in recognition of its service to the Piedmont Triad region.

The airport has seen significant growth over the years, and in 2019, it was the second-largest airport in North Carolina, serving over 1.28 million passengers. It is a hub for both passenger and cargo flights, with over 130 daily flights operated by major carriers such as American Airlines, Delta Air Lines, and United Airlines. The airport also serves as a regional hub for freight carriers such as UPS and FedEx.

The airport's three-letter identifier, GSO, was chosen in accordance with the IATA (International Air Transport Association) Airport Code System. The first two letters of the code indicate the city, and the third letter usually corresponds to the first letter of the airport's name. In this case, G stands for Greensboro, S for Piedmont Triad International Airport, and O for the airport's original name, Greensboro Municipal Airport.

The airport offers a wide variety of services and amenities, including two full-service restaurants, two cafes, a snack bar, and a hotel. It also features a shopping area with stores and services, a USO lounge, a pet relief area, and a variety of ground transportation options.

Greensboro Piedmont Triad International Airport is a major contributor to the local economy, providing over 5,700 jobs and generating over $600 million in economic activity each year. It is also a major international gateway, connecting the Piedmont Triad region with destinations around the world. The airport is currently served by over 130 daily flights, and it is expected to continue to grow in the coming years.