Post useful information for visitors to IAD to review Customs/Immigration Everyone arriving at a US airport from an international location must go through C&I, the airport facilities do not support transit areas for connecting passengers (eg coming from europe to asia, via the US - even though you're passing through, you will still need to go through C&I upon arrival in the US) There are two locations at IAD where you might enter the US off an international flight. If flying UA or a *A partner and are connecting to another outbound flight, you'll be processed at the mid-field terminal under C. For anyone terminating their travel at IAD or flying a non-*A airline, they will be processed at the main terminal facilities. Global Entry kiosks are located to the far right as you reach the bottom of the escalator!! In both cases, once you go through the immigration process, you will need to collect your checked luggage, proceed through customs and then (if connecting) re-check your luggage with the airline. Usually airline staff and baggage check facilities are available immediately after customs. Connecting at IAD IAD now has an aerotrain (late 2010) that travels from the main terminal to A then C; or from the main terminal to B. Note that there are long walks associated with the aero train if flying United Express from the Terminal A stop (up and down escalators) and an even longer walk to get to the C terminal from the aerotrain station. If arriving/departing into Terminal D, there are people mover/buses available that will take you to main terminal (not sure if there are any available to A/B with aerotrain) Terminals C and D are connected - it can be a longer walk to go from C1 to Terminal D. Terminals A and B are also connected - and that is also a very long walk from the express A gates all the way to the end of B Terminal Z is for US Airways and is part of the main terminal on a level below ticketing. From the above, note that IAD has a lot of walking required of the passengers transiting the airport. I've heard more than once from people that have selected other airports because of this issue with the airport design. Lounges UA has 3 lounges in Terminal C/D area - they are near C7, C17 and D5 . They now offer free basic wine/beer and some snacks. LH has a *A lounge in the B Terminal right across from the aerotrain stop. It has two levels, *Gold and HON members go upstairs, LH Biz customers are downstairs. They have restaurant service and pretty good food. There is a Virgin clubhouse that is a 2-level lounge Parking Parking is free for the first 20 minutes. You can pay for parking in the terminal at one of the available kiosks, so keep your parking stub with you. Valet Parking - Very expensive. You can use the underground walkway to go from valet to the terminal. I haven't used this recently, but it was convenient. Hourly Parking - don't use this if you're going to be there for more than an hour. The lot is located on the ground directly in front of the terminal Daily Parking - available in the two parking garages built to the right of the terminal (DL side) and across the parking lot with an underground walkway. In both cases, there is also a bus that can bring you to the terminal, I find the walking to be easier in both cases. Economy Parking - remote parking lots are color coded - there are blue, green and gold; for holidays when extra parking is needed, purple is also made available. These are serviced by buses. Buses are supposed to circle a minimum of every 20 minutes, I've called the phone number on the little stop shelter more than once to ask when the next one would be available if it was clear they weren't coming often enough. Cell Phone Parking - there is a free cell phone waiting lot where you are supposed to stay with your car. The buses from parking lots to the terminal have two stops, the first are for airlines like DL, B6, AF, etc and the second lot is mostly for UA, LH Security Security at IAD is generally a nightmare. They have installed the nude-o-scopes upstairs and downstairs. On the baggage level near belt #7 there is an employee checkpoint and directly next to that one, a Diamond line. The "Diamond" is a misnome as the line is used for wheelchairs and anyone else who wants to use it. The line though is usually shorter than heading downstairs and is run a bit better than the one downstairs. It closes at 7m (?) every night. Downstairs security is available from both sides of the terminal, the DL side usually has a shorter line versus the UA side due to the volume of passengers. In both cases, the TSA plays games with the passengers and lines - there are elite lines, but a warning that the id checkers can make the premium line be a much longer experience than the regular line as they throttle the through-put on a regular basis. Check where the lines are feeding to in terms of the ID checker - if the one servicing the premium line is also taking ID from the regular line, plus there is one or more ID checkers helping the regular lines, the regular lines might be the better bet. Once through security, either follow signs downstairs to the Aerotrain or up a level to the people mover or upstairs to Terminal Z (US Airways).