Baltimore Washington International Airport (BWI): The Complete Guide

BWI Airport Overview

Baltimore/Washington International Thurgood Marshall Airport (BWI) is one of the three major airports serving the Washington DC and Baltimore metro area, along with DCA (Reagan National) and IAD (Dulles). BWI serves more than 28 million passengers per year and is the busiest of the three DC-area airports for Southwest Airlines — Southwest accounts for more than 70 percent of BWI's passenger traffic, making it one of the most Southwest-dominated major airports in the United States.

The airport is completing the largest capital project in its history — a massive renovation and expansion that was announced in 2022 and is expected to complete in summer 2026. This project is improving security checkpoints, expanding concession space, and upgrading infrastructure throughout the terminal.

Terminal and Concourse Layout

BWI has one main terminal with five concourses: A, B, C, D, and E. The concourses are arranged so that A, B, and C share a connected secure zone, while D and E share a separate secure zone. This means passengers can move freely between A, B, and C after security, and between D and E, but cannot cross from the ABC zone to the DE zone without exiting and re-entering security.

Concourses A and B (30 gates total)

Concourses A and B are interconnected and primarily serve Southwest Airlines. These are the busiest concourses at BWI given Southwest's 70 percent market share. Concourse A also handles some Southwest international service to the Caribbean and Mexico.

Concourse C (14 gates)

Concourse C is utilized by Southwest Airlines, American Airlines, and Contour Airlines. It connects directly to Concourses A and B in the same secure zone.

Concourse D (23 gates)

Concourse D accommodates a mix of domestic and international airlines including Delta, United, Alaska, Frontier, Spirit, and Air Canada. Concourse D and E share a separate secure zone from A, B, and C.

Concourse E (11 gates, international)

Concourse E is dedicated to international flights, with 11 gates including four arrival-only gates. Airlines operating international service include British Airways, Icelandair, Norwegian, Condor, and others depending on the season. International arrivals clear customs and immigration at Concourse E before connecting to baggage claim or onward flights.

Airlines at BWI

Southwest Airlines dominates BWI's traffic by a wide margin. Other carriers include American Airlines, Delta Air Lines, United Airlines, Alaska Airlines, Frontier Airlines, Spirit Airlines, and Air Canada. International carriers serving Concourse E include British Airways (London Heathrow), Icelandair (Reykjavik), Norwegian, Condor (Germany), and various seasonal European and Caribbean services.

Getting To and From BWI

MARC Train and Amtrak

BWI has a dedicated rail station — BWI Marshall Airport Station — connected to the terminal by a free shuttle that runs every 10 minutes. From the station, you can board MARC commuter trains (for local service to Baltimore Penn Station and Washington Union Station) or Amtrak trains (for faster intercity service). MARC Penn Line to Baltimore Penn Station takes about 15 minutes. MARC Penn Line or Amtrak to Washington Union Station takes 30 to 40 minutes. This is an excellent transit option for both Baltimore and Washington-bound travelers.

Light Rail BWI

The MTA Maryland Light Rail connects BWI's remote parking area to downtown Baltimore in about 45 minutes. A free shuttle connects the Light Rail station to the terminal. This is a cheaper option than MARC for Baltimore-only trips.

Rideshare and Taxi

Uber and Lyft pick up at the designated ground transportation area. Downtown Baltimore is about 20 to 30 minutes and $25 to $40. Downtown Washington DC is about 40 to 60 minutes and $55 to $85 depending on traffic on the BW Parkway and I-295. Annapolis is about 25 to 30 minutes and $30 to $45.

Rental Cars

All major rental car brands operate at BWI. The consolidated rental car center is accessible from the terminal. A rental car is useful for trips to Annapolis, the Maryland Eastern Shore, and destinations not served by the rail network.

Parking

BWI has terminal garages and economy lots. Daily garage rates run $22 to $28. Economy lots are $10 to $15 per day with shuttle service. The economy lots are a strong value for multi-day trips given the MARC/Amtrak rail alternative for getting to/from the airport.

Lounges

• American Airlines Admirals Club (Concourse C) — Available to Admirals Club members and eligible American passengers.
• United Club (Concourse D) — Available to United Club members and eligible United passengers.
• Delta Sky Club (Concourse D) — Available to Sky Club members and eligible Delta passengers.

Southwest does not operate a traditional lounge. Priority Pass holders should check their network for any additional options at BWI.

Dining and Shopping

BWI has a strong selection of dining across all five concourses, with a good mix of regional Maryland concepts and national chains.

• Phillip's Seafood — A Maryland institution serving blue crab, crab cakes, and Chesapeake Bay seafood. One of the best regional dining experiences in any DC-area airport.
• Obrycki's Crab Cakes — Another Maryland seafood staple with airport presence. The crab cakes are legitimately excellent.
• Vino Volo — Wine bar with a curated list and light food options. A good choice for longer waits.
• Starbucks, Chick-fil-A, Dunkin' — National quick-service chains available throughout all concourses.

Wi-Fi and Connectivity

BWI offers free Wi-Fi throughout the terminal and concourses. The expansion project improving in 2026 includes Wi-Fi upgrades. TSA PreCheck and CLEAR lanes are available at the security checkpoints. Power outlets are available at gate areas, with additional charging stations being added as part of the expansion.

Tips for Navigating BWI

• Know your concourse zone. Concourses A, B, and C are one connected zone; D and E are another. If you are connecting between an airline in Zone ABC and one in Zone DE, you must exit and re-enter security. Allow extra time for this.
• MARC train is excellent for Baltimore and DC. The free shuttle to BWI Marshall Station and then MARC or Amtrak is by far the most reliable way to reach downtown Baltimore or Washington DC, especially during rush hours when road traffic can be severe.
• Eat Maryland crab. Phillip's Seafood and Obrycki's are both genuinely good versions of Maryland crab cakes. This is the authentic regional food experience at BWI — take advantage of it.
• BWI vs. DCA vs. IAD. BWI is best for Southwest flights and for travelers going to Baltimore or northern Virginia/Maryland suburbs. DCA is best for downtown DC access and most non-Southwest airlines. IAD is best for United hub connections and international Dulles flights.
• Construction through summer 2026. The major expansion project may cause temporary changes to concession availability and some terminal areas. Follow airport signage for the most current routing.

Nearby Hotels

The BWI Airport Marriott is directly adjacent to the terminal with covered walkway access. The Westin Baltimore Washington Airport is within a 5-minute shuttle. Downtown Baltimore's Inner Harbor area — about 20 to 25 minutes by MARC or rideshare — has excellent hotel options including the Hyatt Regency Baltimore Inner Harbor and the Four Seasons Baltimore.