British Airways will close its lounge in Gatwick's North Terminal in January 2016.
The carrier is scheduled to move all flights across to the South Terminal in November 2016, leaving a ten-month period when there will be no BA lounge in the North Terminal.
During that time, passengers will have access to the No.1 Traveller lounge instead of a dedicated BA lounge.
The BA facility is being closed so that construction work can take place. Easyjet is also due to consolidate its South Terminal operations to the North Terminal in November 2016.
A BA spokesperson said: "Our customers are invited to use Gatwick's No.1 lounge from January 2016 when the current British Airways lounge will be closed for building work."
Earlier this month, it emerged that No.1 Traveller will double its capacity in both Gatwick terminals over the next year.
ba.com