Main Terminal (Check-in and Departures)
Dulles International Airport (IAD) centralizes all check-in and baggage drop-off processes in the Main Terminal. Regardless of your airline or destination, you must go to this building to start your journey. The upper level houses the check-in counters, divided into dedicated ticketing zones.
Once you have completed check-in and passed through security screening, passengers proceed to the various concourses using the automated AeroTrain system, Mobile Lounges, or pedestrian walkways, depending on the assigned gate.
Check-in Desks by Zone
Zone 1: Aer Lingus, Aeroméxico, Air China, Air Premia, Allegiant Air, Breeze Airways, British Airways, Delta Air Lines, Egyptair, Ethiopian Airlines, Etihad Airways, ITA Airways, Porter Airlines, Royal Jordanian, Saudia, Sun Country Airlines.
Zone 2: Air France, American Airlines, Brussels Airlines, Contour Airlines, Copa Airlines, Emirates, EVA Air, KLM, Korean Air, Qatar Airways, Royal Air Maroc.
Zone 3: Air Canada, Alaska Airlines, ANA (All Nippon Airways), Austrian Airlines, Avianca, Frontier Airlines, Iberia, Icelandair, Lufthansa, Scandinavian Airlines (SAS), Southern Airways Express, Swiss International Air Lines, TAP Air Portugal, Turkish Airlines, United Airlines.
Airlines and Destinations
Aer Lingus
Nonstop flights to Dublin (DUB) with connections across the UK and Europe.
Official Website | Mobile App
Aeroméxico
Daily flights to Mexico City (MEX).
Official Website
Air Canada / Air Canada Express
Frequent connections to Toronto (YYZ), Montreal (YUL), and Vancouver (YVR).
Official Website
Air China
Flights to Beijing (PEK).
Official Website
Air France
Daily flights to Paris (CDG).
Official Website
Air Premia
Nonstop flights to Seoul-Incheon (ICN).
Alaska Airlines
Flights to the West Coast: Seattle (SEA), Los Angeles (LAX), San Francisco (SFO), San Diego (SAN), and Portland (PDX).
Official Website
Allegiant Air
Seasonal and leisure domestic routes.
All Nippon Airways (ANA)
Nonstop flights to Tokyo-Haneda (HND).
Official Website
American Airlines
Connections to its primary hubs: Dallas/Fort Worth (DFW), Charlotte (CLT), Miami (MIA), Los Angeles (LAX), and Phoenix (PHX).
Official Website
Austrian Airlines
Nonstop flights to Vienna (VIE).
Official Website
Avianca
Flights to Bogotá (BOG), San Salvador (SAL), and Guatemala City (GUA).
Official Website
Breeze Airways
Domestic connections to regional U.S. destinations.
British Airways
Frequent flights to London-Heathrow (LHR).
Official Website
Brussels Airlines
Nonstop flights to Brussels (BRU).
Official Website
Contour Airlines
Regional domestic services.
Copa Airlines
Nonstop flights to Panama City (PTY) with connections throughout Central and South America.
Official Website
Delta Air Lines
Flights to Atlanta (ATL), Detroit (DTW), Minneapolis (MSP), Salt Lake City (SLC), Seattle (SEA), and New York (JFK).
Official Website
EgyptAir
Nonstop flights to Cairo (CAI).
Official Website
Emirates
Nonstop flights to Dubai (DXB).
Official Website
Ethiopian Airlines
Flights to Addis Ababa (ADD).
Official Website
Etihad Airways
Nonstop flights to Abu Dhabi (AUH).
Official Website
EVA Air
Nonstop flights to Taipei (TPE).
Frontier Airlines
Low-cost flights across domestic destinations.
Iberia
Nonstop flights to Madrid (MAD).
Official Website
Icelandair
Nonstop flights to Reykjavik (KEF) with connections to Europe.
Official Website
ITA Airways
Nonstop flights to Rome (FCO).
Official Website
KLM Royal Dutch Airlines
Nonstop flights to Amsterdam (AMS).
Official Website
Korean Air
Nonstop flights to Seoul-Incheon (ICN).
Official Website
Lufthansa
Nonstop flights to Frankfurt (FRA) and Munich (MUC).
Official Website
Porter Airlines
Flights to Toronto-Billy Bishop (YTZ).
Official Website
Qatar Airways
Nonstop flights to Doha (DOH).
Official Website
Royal Air Maroc
Nonstop flights to Casablanca (CMN).
Official Website
Royal Jordanian
Nonstop flights to Amman (AMM).
Saudia
Flights to Jeddah (JED) and Riyadh (RUH).
Official Website
Scandinavian Airlines (SAS)
Nonstop flights to Copenhagen (CPH).
Official Website
Southern Airways Express
Regional flights to DuBois (DUJ), Morgantown (MGW), and Lancaster (LNS).
Official Website
Southwest Airlines
Flights to Denver (DEN), Atlanta (ATL), Chicago (MDW), Orlando (MCO), and more.
Official Website
Sun Country Airlines
Flights to Minneapolis/St. Paul (MSP).
Official Website
Swiss International Air Lines
Nonstop flights to Zurich (ZRH).
Official Website
TAP Air Portugal
Nonstop flights to Lisbon (LIS).
Official Website
Turkish Airlines
Nonstop flights to Istanbul (IST).
Official Website
United Airlines (Primary Hub)
Operates the largest network of destinations from Dulles, serving over 100 domestic cities and extensive long-haul routes to Europe, Asia, Latin America, and the Caribbean.
Official Website | Mobile App
Virgin Atlantic
Nonstop flights to London-Heathrow (LHR).
Official Website
Volaris
Flights to San Salvador (SAL) with onward connections to Central America and Mexico.
Official Website
WestJet
Seasonal flights to Calgary (YYC) and Vancouver (YVR).
Official Website
Concourse Layout
Z Gates (Main Terminal): Located just past security screening within the Main Terminal building. Frequently used by regional and low-cost carriers (Air Canada Express, Frontier, Southern Airways Express).
A and B Concourses: Accessible via the AeroTrain system or the underground moving walkway. Concourse A hosts international carriers and selected United Express regional flights; Concourse B serves the majority of non-United international and U.S. domestic airlines (such as Delta, American, Southwest, and Alaska).
C and D Concourses: Exclusive operational hub for United Airlines. Concourse C is served by the AeroTrain, while Concourse D is accessed via Mobile Lounge shuttles from the Main Terminal or by walking from Concourse C.