Located 26 miles west of downtown Washington, D.C., in Northern Virginia, Washington Dulles International Airport spans 13,000 acres. As the 24th-busiest airport in the United States, it handles over 29 million passengers annually and serves as the primary international gateway for the National Capital Region, processing roughly 90% of the area's international passenger traffic.
The airport is structured around Eero Saarinen's acclaimed Main Terminal for ticketing and baggage claim, alongside midfield concourses housing gates A, B, C, and D. Dulles acts as a major hub for United Airlines and its United Express partners, hosting extensive domestic and international connections along with numerous Star Alliance member airlines.
01 Terminals & concourses
Designed by architect Eero Saarinen, this iconic terminal handles passenger processing, security checks, baggage claim, and ground transport connections.
Linked to the Main Terminal by an underground walkway and AeroTrain, Concourse B hosts low-cost airlines and international arrivals.
Serving as United Airlines' primary hub facility, these midfield concourses are accessible via AeroTrain or mobile lounges.
Airport map
The free OpenStreetMap layer below shows the whole airport — terminals, concourses, access roads and the parking garages. Zoom in for gate-level detail.
Map: © OpenStreetMap contributors (ODbL, free). Official gate/terminal maps are copyrighted — we link to them.
02 Which terminal does my airline use?
Airlines are grouped by alliance and region. Always confirm the concourse printed on your boarding pass — assignments can change seasonally.
Show all airlines by terminal ›
Grouped by terminal — check the concourse on your boarding pass before you fly; assignments can change seasonally.
Lost, delayed or damaged baggage at IAD
If your checked bag doesn't turn up on the belt, act before you leave the baggage-claim area — that's where every airline keeps its Baggage Service Office.
- Go to your airline's Baggage Service Office in the baggage-claim hall of your arrival terminal.
- File a Property Irregularity Report (PIR) and get your file reference (WorldTracer) number. Keep your bag-tag receipt and boarding pass.
- Track it online using that reference on your airline's baggage-tracking page — most bags are located within 24–48 hours.
- Claim your essentials. On delayed bags airlines reimburse reasonable interim purchases (toiletries, clothing) — keep receipts. International trips are covered by the Montreal Convention.
- If it's truly lost (generally after 21 days) or damaged, file the claim at the same office — damage must be reported before you leave the airport.
Left something in the terminal (not a checked bag)? That's handled by the airport Lost & Found. Items left at a TSA security checkpoint are held by the TSA, not the airline.
03 Getting to & from IAD
These are the ground-transport options connecting the airport with the city. Fares and schedules change — check the operator before you travel.
| Option | Details |
|---|---|
| Metro | Washington Metro Silver Line passenger rail line connects the terminal directly to the regional transit network. |
| People Mover | AeroTrain underground train system and traditional mobile lounges transport travelers between the main terminal and midfield concourses. |
| Road | A dedicated limited-access highway connects the airport to the Capital Beltway (I-495) and Interstate 66. |
04 Lounges & amenities
United Airlines operates a 20,000 square foot Polaris Lounge on Concourse C for international passengers.
Washington Dulles International Airport in pictures
