Do you have to go through security again for a connecting flight in SFO?

Connecting Flights at SFO: Security Considerations

San Francisco International Airport (SFO) is a major hub for international travel, and connecting flights are common. However, travelers connecting through SFO need to be aware of potential security procedures, as they may encounter a second security screening.

While many connecting flights within SFO’s terminals may allow seamless movement between gates without requiring a second security checkpoint, this isn’t always the case. If your connecting flight involves a change of terminal or a significant delay in your journey, you may need to go through security screening again, even if you already passed through it for your initial flight.

Crucially, the most important factor in avoiding a second security check is maintaining secure access within the airport. This means remaining within the secure areas of the terminal where your first flight originated. If you leave those secured areas, you might need to undergo security screening again, even for a connecting flight within the same terminal.

Key considerations for avoiding a second screening:

• Itinerary: Carefully review your flight itinerary for details on the connection. Sometimes, specific instructions regarding security protocols for connecting flights are included.
• Airport Signage: SFO utilizes signage to guide passengers through the airport. Pay close attention to signs indicating security procedures for connections, particularly if you are transferring to a different terminal or face a significant delay.
• Terminal Information: Before your flight, familiarize yourself with the layout and security procedures for the terminals involved in your connection. Knowing the rules of each terminal will be crucial.

If your connection requires a second security check, it is advisable to arrive at the airport well in advance of your connecting flight to account for potential delays and ensure you have ample time to navigate the airport and go through security. Checking the status of your connecting flight and any potential delays is also recommended.

Important Note: This information is based on general practices at SFO. It is crucial to check the latest official airport guidelines and/or contact your airline directly if there is any uncertainty about the specific security requirements for your connecting flight. This will ensure a smoother and more stress-free travel experience.