Raleigh–Durham International Airport (IATA: RDU, ICAO: KRDU, FAA LID: RDU), locally known by its IATA code RDU, is an international airport that serves Raleigh, Durham, and the surrounding Research Triangle region of North Carolina as its main airport. It is located in unincorporated Wake County, but is surrounded by the city of Raleigh to the north and east, and the towns of Cary and Morrisville to the south. The airport covers 5,000 acres (20 km2) and has three runways.

As of 2025, RDU ranks 35th in passenger arrivals and departures in the US, offering passenger service to over 75 destinations, including 14 international destinations in ten countries. There are more than 400 average daily flights. The RDU Airport Authority is in charge of the airport facilities and operations and is controlled by a board of representatives from the counties of Wake and Durham and the cities of Raleigh and Durham.

Raleigh–Durham International Airport is the second-largest airport in the state of North Carolina, behind Charlotte Douglas International Airport. The main catchment area is central & eastern North Carolina, and southern Virginia. The airport is an operating base for Avelo Airlines and Endeavor Air, as well as a focus city for Delta Air Lines.

In 2024, RDU served a record 15.5 million passengers, which broke the airport's record of 14.5 million passengers set in 2023.