SFO serves dozens of international routes to destinations in Asia, Europe and Central America, making it a key gateway for global travel. The proposal, if implemented, could affect operations at SFO and airports in other major cities.
President Donald Trump first raised the possibility months ago, and Secretary Mullin reiterated the position during an interview Wednesday on Fox News. Mullin said plans are being considered to stop customs processing at airports in cities that do not cooperate with federal immigration enforcement, though no formal policy has been announced.
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Airports in New York, Los Angeles and Seattle - among the busiest in the country - could also be impacted if the proposal moves forward.
Early reaction from local organizations and travelers has been cautious. Many say they are waiting to see whether the administration follows through. Some groups contacted declined to comment, citing the uncertainty surrounding a plan that remains hypothetical.
Officials at San Jose Mineta International Airport and Oakland International Airport said they are not aware of any policy changes and will continue to monitor the situation. ABC7 Eyewitness News has reached out to SFO and is waiting to hear back.
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Industry leaders have raised concerns about the potential fallout. In a statement, the U.S. Travel Association said, "U.S. Travel believes such a move would have devastating consequences for the travel industry and communities that depend on international visitation."
The proposal comes as the FIFA World Cup is set to begin next month, a development that typically brings increased international travel to U.S. cities. Other airports reportedly under consideration include those in Los Angeles, New York City, Chicago and Seattle.
Officials also reached out to the San Francisco city attorney's office to determine whether any legal or policy actions are being considered in response. No additional details have been released.