Washington airport codes decoded: DCA, IAD, WAS and BWI
Washington does not have one passenger airport code that works for every trip. DCA is Ronald Reagan Washington National Airport, IAD is Washington Dulles International Airport, and WAS is a metropolitan-area search code rather than a single airport. BWI is a separate Maryland airport that also serves many Washington travelers.
First identify the actual airport, then check live information
A Washington-area search can display several airports. Before checking parking, security or transportation, confirm the three-letter code printed beside the actual flight segment.
There is no single Washington airport code
Washington, D.C. is served by multiple airports, so the correct code depends on the actual airport. The FAA currently identifies Reagan National as DCA / KDCA and Washington Dulles as IAD / KIAD.
Airport live checks & travel tools
Use current local conditions, official live-status links and planning calculators before you travel. Airline gate, terminal and flight times can change; your carrier remains the final source for flight-specific details.
Live flight center
Check the airport's official flight board, then confirm any last-minute gate or timing change with the airline.
Current airport-area weather
Useful for planning your trip to the airport. This is model-based local weather, not an aviation METAR or an airline operational forecast.
Quick official checks
Open the source that matches the decision you are making right now.
When should I reach the airport?
A planning estimate based on flight type and common time buffers. Always increase the buffer for severe weather, major holidays, unusual airport alerts or airline instructions.
Connection-risk checker
This is a planning heuristic, not an airline minimum-connection-time rule. International arrivals that require U.S. entry processing, baggage claim and security can need substantially more time.
Parking cost estimator
Uses the airport-specific rates stored in this article's configuration. Rates can change; verify availability and final pricing on the official parking page before driving in.
Passenger pickup readiness
Landing time is not curb-ready time. Add time for taxiing, deplaning, baggage claim, customs when applicable and walking to the correct pickup zone.
| Code | What it identifies | ICAO | Traveler meaning |
|---|---|---|---|
| DCA | Ronald Reagan Washington National Airport | KDCA | Physical airport in Arlington, Virginia, directly connected to Blue and Yellow Line Metro service. |
| IAD | Washington Dulles International Airport | KIAD | Physical airport in Northern Virginia with extensive international and long-haul service; Silver Line Metro. |
| WAS | Washington metropolitan-area code | — | Search/reservation code for the city area, not one airport. Inspect the resulting DCA/IAD/BWI flight. |
| BWI | Baltimore/Washington International Thurgood Marshall Airport | KBWI | Separate airport in Maryland serving Baltimore and the broader Washington region. |
DCA: Ronald Reagan Washington National Airport
DCA is the IATA code for Ronald Reagan Washington National Airport. Although it primarily serves Washington, D.C., the airport is physically located at 2401 Smith Boulevard, Arlington, Virginia 22202.
Direct Metrorail access
The Reagan National Metro station is served by the Blue and Yellow Lines. Covered walkways connect the station with the airport.
Terminal 1
Terminal 1 is a separate passenger area. Current MWAA parking information lists airlines including Air Canada, Frontier and Southwest in connection with Terminal 1 parking guidance.
Terminal 2
Terminal 2 handles airlines including American, Alaska, Delta, JetBlue and United under current MWAA parking guidance.
Ride-app pickup
At Terminal 1, current MWAA instructions direct Uber and Lyft passengers to the third outer curb. At Terminal 2, ride-app pickup is on the Baggage Claim/Arrivals Level outer curb, using Zones 1 through 4.
IAD: Washington Dulles International Airport
IAD is the IATA code for Washington Dulles International Airport. The FAA identifier is IAD and the ICAO code is KIAD. WMATA lists the airport at 1 Saarinen Circle, Dulles, Virginia 20166.
Silver Line
The Dulles Airport Metrorail station connects to the main terminal through an indoor pedestrian tunnel with moving sidewalks.
AeroTrain
AeroTrain moves passengers between parts of the airport after security. Gate location determines whether AeroTrain, walking or a mobile-lounge route is used.
Airport transformation
IAD is undergoing a major modernization program. Current plans include new and replacement concourses, expanded AeroTrain connections and a larger international-arrivals pathway.
IAD rideshare
Uber and Lyft use the third curb on the ground level outside Baggage Claim. Current Dulles guidance directs passengers through Doors 2, 4 or 6 to numbered pickup zones 3A–3H.
What does WAS mean on a Washington flight search?
WAS is not a physical airport. It is used in travel reservation and fare-search contexts to represent the broader Washington metropolitan area.
A search using WAS can therefore produce flights at different airports. Before paying for the ticket, open each itinerary and identify the airport code assigned to the actual flight segment.
Search Washington or WAS
Use the metropolitan search only to compare schedules and fares across the region.
Open the exact flight
Find DCA, IAD or BWI next to the departure or arrival airport.
Book ground travel using that airport
Match parking, Metro, rail, rideshare, rental cars and hotel transportation to the physical airport code rather than WAS.
BWI: Baltimore/Washington International Thurgood Marshall Airport
BWI is a separate airport in Maryland, not another terminal at DCA or IAD. The FAA ICAO identifier is KBWI, and the airport lists its passenger address as 7050 Friendship Road, Baltimore, Maryland 21240.
BWI to Washington by rail
BWI’s MARC/Amtrak station is not inside the passenger terminal. The airport operates a free shuttle between the terminal and rail station. Current BWI guidance says the shuttle normally runs about every 10–15 minutes, with less frequent service in the overnight 1 a.m.–5 a.m. period.
Amtrak travelers from Washington use Union Station for trains to BWI’s rail station. MARC service can also connect Washington and the BWI area depending on the operating schedule.
Ride-app pickup
BWI currently directs app-based rideshare pickup to the outer curb of the Departures/Upper Level between Doors 5 and 12.
Metro and rail options from DCA, IAD and BWI
The airports do not share one ground-transport system. DCA and IAD have direct Washington Metrorail stations, while BWI uses a separate rail station linked to the airport by shuttle.
| Airport | Primary rail option | Airport connection | Important detail |
|---|---|---|---|
| DCA | Blue / Yellow Line Metro | Covered walkway to airport | Station connects directly with Terminal 2 area. |
| IAD | Silver Line Metro | Indoor pedestrian tunnel | Moving sidewalks connect station and main terminal. |
| BWI | MARC / Amtrak | Free airport shuttle | Allow time for shuttle transfer between terminal and rail station. |
Terminals and gate areas are different at each Washington-area airport
Terminal 1 + Terminal 2
DCA has two passenger terminals. Check your airline before choosing parking, Metro walking directions or a pickup point.
Main terminal + gate areas
Dulles uses a main terminal and multiple gate areas, including Z, A, B, C and D. Post-security transportation varies by gate.
Concourses A–E
BWI’s main terminal connects with Concourses A, B, C, D and E. International-arrival facilities are associated with the E side of the complex.
Security and ID rules at Washington-area airports
DCA, IAD and BWI use TSA passenger screening. As of May 7, 2025, TSA no longer accepts non-REAL-ID-compliant state driver’s licenses or state IDs as standard checkpoint identification. Travelers can instead use another acceptable document such as a passport when applicable.
Check your ID
Verify that your driver’s license is REAL ID compliant or carry another TSA-accepted form of identification.
Use live checkpoint information
Airport checkpoint waits change throughout the day. DCA, IAD and BWI provide current security information through their official airport websites.
Follow airline timing
Airport arrival recommendations do not override an airline’s baggage cutoff, international-document check or boarding deadline.
Parking differs significantly between DCA, IAD and BWI
All three airports provide official airport parking, but the products and shuttle requirements differ. Do not choose a parking facility until you know the physical airport.
Parking 1, Parking 2 and Economy
MWAA operates terminal-oriented garages and an economy option. Current DCA guidance includes 24/7 parking shuttle service.
Terminal, Garage and Economy options
Dulles provides Terminal Parking, Garages 1 and 2 and Economy parking. Reservations are useful during high-demand periods.
Hourly, Daily, Express and Long Term
BWI currently publishes four main parking categories, with shuttle service from Daily, Express and Long Term facilities.
DCA, IAD and BWI are not interchangeable terminals
A ticket that arrives at one Washington-area airport and departs from another creates a ground transfer between separate airports. You may need to collect baggage, leave the airport, travel across the region and complete check-in and TSA screening again.
Check whether the airports differ
Look at both flight segments. DCA→IAD, IAD→BWI and BWI→DCA all require an inter-airport ground transfer.
Confirm baggage handling
Ask the airlines whether checked baggage must be collected. Separate tickets make through-checking less likely.
Calculate door-to-door transfer time
Include baggage reclaim, walking, Metro/train wait, traffic, station transfers and time required to enter the next airport.
Add a new security and check-in buffer
Arriving at the second airport is not the same as reaching the gate. Airline cutoff times and TSA screening still apply.
What to do if you go to the wrong Washington airport
Confirm the code on the current itinerary
Find DCA, IAD or BWI. Do not rely on the word “Washington.”
Contact the operating airline if departure is close
The airline can explain your actual check-in or rebooking options. The airport itself normally cannot change an airline ticket.
Recalculate the entire ground journey
Choose Metro, rail, taxi or rideshare based on the two physical airports involved and current traffic or service conditions.
Correct related reservations
Parking, rental cars, hotel shuttles and pickup instructions may also be booked for the wrong airport.
Use the airport-specific guide once you know the code
Reagan National guide
Use the dedicated page for deeper DCA terminal, Metro, parking and pickup information.
Dulles guide
Use the dedicated Dulles page for IAD gates, AeroTrain, international arrivals, Metro and parking.
Washington airport code FAQs
What is the Washington airport code?
What is the airport code for Reagan National?
What is the Washington Dulles airport code?
Is WAS an airport?
Is BWI a Washington, D.C. airport?
Which Washington airports have Metro stations?
Which airport code should I use for downtown Washington?
Where is DCA located?
Where is Dulles Airport?
How do I get from BWI to Washington?
Do I need REAL ID at DCA, IAD or BWI?
Sources and update policy
This page separates stable airport codes from changing operational information. DCA, IAD and BWI codes are stable, while gates, parking capacity, security waits, road traffic and transit service can change quickly.