Navigating the sprawling expanse of San Francisco International Airport can be a daunting task, especially when your journey involves a move from Terminal 1 to Terminal 3. Whether you are catching a connecting flight or simply exploring the different offerings of the airport, understanding the distance, available transit options, and estimated time is crucial for a smooth experience. This guide breaks down everything you need to know about traveling between these two specific terminals.
Understanding the Distance and Layout
Terminal 1 and Terminal 3 are situated on the southern end of the SFO airfield, but they are not directly adjacent. The physical distance between the two terminals is approximately 1.1 miles, which translates to roughly 1.8 kilometers. While this might seem manageable, the sheer size of the airport and the layout of the terminals mean that simply walking is usually not the most efficient option, especially when factoring in security checkpoints or the time pressure of a tight connection.
The AirTrain System: Your Primary Connection
The most reliable and recommended method for moving between Terminal 1 and Terminal 3 is the SFO AirTrain. This automated people mover system is designed specifically to connect the airport’s terminals and the remote Garage G parking facility. It operates on a continuous loop, making it a convenient choice for travelers regardless of their flight schedules. The AirTrain provides a fast, safe, and climate-controlled environment, ensuring you arrive at your destination without exposure to the elements.
AirTrain Route and Key Stops
To travel from Terminal 1 to Terminal 3, you will board the AirTrain at the station located directly outside the arrivals level of Terminal 1. The train will then travel counter-clockwise around the terminal loop. The journey includes a stop at the International Terminal (also known as Terminal 2) before proceeding to Terminal 3. The entire trip typically takes between 10 to 15 minutes, depending on the specific route and any brief dwell times at intermediate stations.
Walking Between the Terminals: An Alternative Option
For travelers with ample time and a preference for stretching their legs, walking between Terminal 1 and Terminal 3 is technically possible. The route is covered and generally follows the perimeter of the airport structure. However, this walk is exposed and lacks the comfort of the AirTrain. It is also important to note that you must pass through security screening again if you are re-entering the secure zone of Terminal 3, which adds significant time to your journey and is a step many travelers overlook.
Important Considerations for International Arrivals
If you are arriving on an international flight into Terminal 1 and need to proceed to Terminal 3 for a domestic connection, the process is slightly more complex. After deplaning, you will exit the secure area and take the AirTrain to Terminal 3. Upon arrival, you will need to go through the full security checkpoint before accessing the gates. This includes TSA screening, which can add 20 to 40 minutes to your transfer time, making it essential to account for this buffer in your schedule.
