Boston Airport

Boston Airport, (officially Boston International Airport), is a location in the Commonwealth which is initially deserted but later controlled by the Brotherhood of Steel in 2287.

Background
Before the Great War, Boston International Airport served as a hub for both domestic and international flights. Airlines such as Horizon Airlines and Skylanes Air operated here, providing service to cities such as Chicago and New York and according to a sign near the area where the workshop is located, the airport also handled "private flying" (for example, general aviation or charter flights). Many people who were in the airport hangar and terminals were killed during the Great War.

Layout
Before the war, the airport was composed of several runways, hangars, and support buildings. Struck by rising sea levels after the Great War, the runways and other low-lying buildings were submerged by the adjacent ocean.

The airport is comprised of a central terminal building, which is mostly destroyed, a parking garage and a small garage. There is also a tarmac bearing the remains of several Horizon Airlines jet airliners. The airliners are completely destroyed, with the wings separated and the fuselages torn into three parts. The aircraft interiors have been completely stripped out. The tarmac is also littered with an abundance of junk.

The entire site is inhabited by feral ghouls. There is a glowing one on the top floor of the terminal. The tarmac is sunken into the bay, and mirelurks inhabit the shore. On the lowest floor of the parking garage, there are two police protectrons which can be activated using the Novice locked terminals nearby. After the completion of the Reunions quest, the Brotherhood of Steel will establish a base at the airport, containing a helipad for vertibirds, a gantry to hold the remains of Liberty Prime and a supply depot. The Prydwen will also be anchored over the airport unless destroyed.

The settlement is used as part of several storyline quests for the Brotherhood of Steel. Firstly as a build area to construct parts for the quest Liberty Reprimed and also as a build area to construct the signal interceptor if siding with the Brotherhood in the quest the Molecular Level.

If the Sole Survivor becomes enemies with the Brotherhood of Steel, the Sole Survivor loses control of Boston Airport as a settlement. The settlement cannot be regained until the Prydwen is destroyed through either Rockets' Red Glare, Airship Down, or With Our Powers Combined. The airport ruins must also be cleared of feral ghouls. Otherwise, when attempting to use the workshop, the message "You cannot use this workshop yet" appears.

There is an exterior waiting area at the end of the terminal that contains the workshop. It can be used as a settlement but with severe limitations. Several settlement objects cannot be built, such as:
 * Water purifiers cannot be built since the settlement radius doesn't extend to the water. Only pumps can be used to provide a water supply.
 * Crops cannot be planted nor can garden plots be built.
 * Recruitment radio beacon can not be built.
 * Guard posts and artillery pieces. The only way to improve settlement defense is to use turrets. Vault-Tec type guard posts can be built though if that DLC is installed.
 * Stores and scavenging stations cannot be built.

Inhabitants

 * Knight Sergeant Gavil
 * Knight Lucia
 * Initiate Clarke
 * Proctor Ingram
 * Madison Li (after completing From Within)
 * Professor Scara (after completing Liberty Reprimed, if the player character hasn't recruited Li)

Notable loot

 * There is a fusion core in the generators at the southeastern end of the ground floor of the terminal.
 * There is a mini nuke upstairs guarded by a glowing one.
 * There is a Fat Man in a car, near the water on the runway. From the Boston Airport, fast travel location proceeds east. The nose section of an airplane will be in front of the Sole Survivor. The Fat Man is located in a van on the water's edge behind the nose section.
 * Fishing tournament ad at the airport's ruins, on a magazine shelf behind the information desk terminal computer, at terminal B. Found when clearing ghouls during the quest Duty or Dishonor.
 * Lucia's personal key - On Lucia. It opens her footlocker onboard the Prydwen.
 * Supply log near the terminal and Gavil.
 * Racetrack advertisement at the airport's ruins, next to the information desk terminal computer.
 * There are three sets of BOS II T-60 power armor that can be stolen from sentries. Once their armor is stolen, the sentries will continue to man their posts. If the sentries are killed, they will eventually respawn with new armor.

Appearances
Boston Airport appears only in Fallout 4.

Behind the scenes

 * Boston Airport is based on Boston's Logan International Airport, which has the same international code, "BOS."
 * The Boston airport's international code could be a double entendre, due to the relation between the international code and the resident faction's acronym.

Bugs
If Wasteland Workshop is installed, trapping has been done and a beta wave emitter is controlling aggressive creatures, and/or crafted robots are present, the start of Liberty Reprimed may allow these NPCs to clip through the workshop wall into the previously locked Prime workshop area and kill the attendant scribes. This apparently has no effect in the quest beyond temporarily interrupting Ingram's initial speech script when she runs to defend the scribes.