Passengers flying Southwest can check in at the dedicated counters in Terminal 1 or use self-service kiosks for faster processing. Security checkpoints in the SFO Southwest terminal are well-equipped and streamlined, minimizing wait times, especially during peak hours. TSA PreCheck and CLEAR services are also available for eligible travelers. https://terminalsworld.com/airlines/southwest-airlines/southwest-airlines-san-francisco-international-airport-sfo-terminal/