Southwest Airlines seeks FAA intervention over San Antonio airport dispute

According to data from Cirium's Diio Mi airline planning tool, Southwest Airlines held a 36.1% market share in San Antonio in 2024, making it the leading airline there. However, Southwest contends that 37% of its passengers will be left behind in an outdated facility while facing disproportionately high rates used to subsidize the new terminal.

Southwest Airlines outlines four principal violations by San Antonio of its Federal obligations concerning terminal space allocation. These include using a cost-allocation approach combining all terminals into one cost center and classifying Southwest as a non-signatory airline during disputes, both alleged violations of the Anti-Head Tax Act (AHTA). Additionally, they claim insufficient consultation during the Terminal Development Program (TDP) and failure to accommodate growth plans.

Southwest urges immediate FAA intervention: “As is supported by the extensive documentation provided in this complaint, Southwest urges the FAA to take immediate action to hold the City accountable to its Federal obligations.” They argue that failing to act would undermine legal protections for airport users under Federal law and FAA policy.

On December 12, 2023, San Antonio approved constructing a new terminal as part of ELEVATE/SAT—an expansion plan aimed at enhancing airport experiences. With completion expected by mid-2028, this project includes adding 17 gates and expanding lounge spaces significantly.