Possible Clues:

• Where we wait to check out perhaps, having checked in?
• Exodus - lie about where those taking flight rested?
• Where flight delay may agitate passengers, new plane route urged
• Where to wait before boarding
• Those on the way out frequently go through it
• Space flight succeeds
• In company here you'll be waiting for a rise
• Airport waiting area
• Going to be idle after leaving here?
• Rest after death - whence one heads heavenwards?