Dulles International Airport (IAD) Tours and Tickets
Dulles International Airport (IAD)

- There is one Main Terminal. Flights operate from midfield concourses A, B, C, and D and from Z-gates connected to the Main Terminal.
- The International Arrivals Building is a separate annex to the Main Terminal.
- Concourse A is used primarily for international flights.
- Concourse B is used for some international flights and all non-United domestic flights and flights to Canada.
- Concourses C and D are used exclusively for United flights.
- Z-gates are used by Air Canada, Frontier, and United Express.
- Travelers can reach the rental car facility by catching a rental car shuttle. Note that some rental car companies share shuttles.
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