This article is about the piece on the soundtrack. For the station, see Airlock.
Airlock is a relieving track that plays after Dr. Ryan Stone gets into the ISS Airlock and is able to breathe gulps of oxygen rather than carbon dioxide. Now she can breathe and so can the audience. The track overall is magical and peaceful.
Airlock does not actually play during the ISS airlock "rebirth" scene. Aningaaq does, even though Steven Price specifically composed music for the airlock scene.