Baltimore Washington (BWI): The Complete Layover Guide

BWI is a single curved terminal with five concourses hanging off it, and the only thing you really need to memorize is the split: A, B and C live behind one set of checkpoints, D and E behind another.

Departures run along the upper level, arrivals and baggage claim along the lower. Checkpoints A, B and C all feed the same secure zone, so once you are through any of them you can walk the full A to C stretch airside in roughly 8 minutes. The separate D and E checkpoint feeds the other secure zone, where a connector lets you walk between D and E gates in about 5 minutes without leaving security.

What you cannot do is walk airside from the A, B, C group to the D, E group. That trip means exiting past the exit lanes, walking the public corridor, and joining a new security line. On a quiet afternoon it takes 20 minutes. With a Southwest morning bank in full swing, it can eat 45. Treat any connection that crosses the split as a real transfer, not a gate change.

Southwest is the landlord here, carrying most of BWI's passengers and filling Concourses A and B with a spillover into C. The airport has spent recent years rebuilding the A and B complex with a new connector and expanded screening; the final layout of that project is to be confirmed, so expect some construction detours on that end of the terminal.

The other thing that sets BWI apart from its Washington area rivals is rail. A free shuttle links the terminal to the BWI Rail Station, where Amtrak and MARC commuter trains run to Washington Union Station in about 30 to 35 minutes. The MTA Light Rail stops right outside the terminal itself, near the Concourse E end, and trundles into downtown Baltimore for a couple of dollars. Neither Dulles nor Reagan National gives you two cities this cheaply.

BWI has two airside lounges, and only one of them is dependable. Plan around that and you will be fine.

The Club BWI in Concourse D near Gate D10 is the workhorse. It takes Priority Pass, Lounge Key and Lounge Club, sells day passes, and admits Amex Platinum cardholders through the Amex lounge program. Entry is permitted up to three hours before your scheduled departure. The catch for most BWI travelers: it sits in the D and E secure zone, so if you are flying Southwest from A, B or C, using it means a full exit and rescreen each way. With less than 3 hours, that math rarely works.

The Chesapeake Club Lounge in Concourse E is built around British Airways, serving its premium passengers ahead of the evening London departure, with limited Priority Pass windows listed as well. Travelers report the published hours are inconsistent in practice, and current opening times are to be confirmed, so do not build a layover plan around getting in. If the door is open, lovely. If not, you were warned.

The USO center on the lower level of the terminal, outside security, serves active duty military, reservists, retirees and their dependents. It is a proper rest stop for those who qualify, and not accessible to the general public. Everyone else should know the Observation Gallery between B and C is a public viewing area with seating and runway views, not a lounge, no matter what an old forum post promises.

BWI is one of the better US airports to sleep in, with one big caveat: the secure side empties out overnight.

The landside terminal stays open around the clock, and the Observation Gallery on the upper level between Concourses B and C is the established camp spot, with padded benches, power outlets and USB ports nearby, and floor to ceiling views of the runway when you wake up. Airside, Concourses C, D and E have padded seating without armrests, but once the checkpoints close late at night you cannot enter or remain airside until screening reopens in the early morning, so an overnight at BWI is a landside affair.

For a real bed inside security during the day, Minute Suites near Gate C3 sells private rooms by the hour. For a real bed full stop, there is no hotel inside the terminal; the closest properties, including a Holiday Inn about a mile away and the BWI Airport Marriott, run 24 hour shuttles, and several more options sit within a couple of miles. On a long overnight gap, a shuttle hotel beats the bench by more than the fare difference suggests.