The over-popularity of Centurion Lounges was not just exclusive to the San Francisco location, although it saw some of the highest demand among the AMEX network of lounges. AMEX eliminated $50 day passes for non-Platinum cardholders. Overcrowding became such an issue that American Express began enforcing time limits at the lounge with most cardholders only allowed in within three hours of a departing flight, and limiting the number of guests a member could bring in with them. At peak times, there was frequently a line out the door to get in, and no where to sit once you entered. The lounge was a huge hit before COVID-19 crushed air travel demand. The current lounge space (which cost $12 million to build in 2014) will expand into an adjacent area located in the terminal’s mezzanine level that’s currently being used as airport offices and storage space. Passengers departing from the International Terminal’s G gates can walk to the lounge via a post-security walkway. The lounge is located beyond the security checkpoints in United's Terminal 3, across from Gates F1 and F2. Negotiations for the expansion pre-date the COVID-19 pandemic, which forced a temporary closure that lasted through Oct. The spokesperson did not reveal when construction would begin or the projected completion date for the project.

Details on what that might entail are being kept under wraps, for now.

The space will also undergo a “refresh” during the expansion. A spokesperson said the lounge will expand to 15,287 square feet, almost twice the size of its current footprint.

Amex centurion lounge sfo