Burlington International Airport (IATA: BTV, ICAO: KBTV, FAA LID: BTV) is a public airport serving Burlington, the most populous city in Vermont. The Burlington area also includes such places as South Burlington, the actual location of the airport, Essex Junction and Winooski. The airport is three miles (5 km) east of the central business district of Burlington, in Chittenden County. It covers 942 acres and has two runways.

BTV has flights to many important airline hubs in the East and Midwest including New York, Boston, Philadelphia, Washington, Chicago, Cincinnati, Cleveland, Detroit, and Atlanta.

In 2012, the airport expanded the parking garage by adding two more levels on the north end for a total of 2700 parking spaces. The airport has renovated the upper concourse rest rooms which have needed renovation for many years.

Burlington International represents the country's second fastest growing airport with annual growth at over 9%.

Two military installations are based there. The first is Burlington Air National Guard Base, which includes the 158th Fighter Wing (158 FW), an Air Combat Command (ACC)-gained unit of the Vermont Air National Guard, flying the F-16C Fighting Falcon. The 158 FW consists of approximately 1000 Air National Guard personnel, both full-time Active Guard and Reserve (AGR) and Air Reserve Technician (ART) personnel and traditional part-time Air National Guardsmen.

The second installation is an Army Aviation Support Facility (AASF) of the Vermont Army National Guard, supporting the 1st Battalion, 103d Aviation Regiment and the 86th Medical Company (Air Ambulance).