San Francisco International Airport (SFO) Terminal Guide To Move Around Easily
San Francisco International Airport (SFO) is a major travel hub for Indian students, NRIs, and travellers flying to or from India. But with 4 separate terminals, T1, T2, T3, and the International Terminal, it’s easy to feel lost if you don’t know where your airline operates.
To make it convenient, we have some context. SFO is a hub for United and Alaska Airlines, with Virgin America also actively operating from here. The airport offers direct flights to 50+ international destinations and nearly 90 cities within the USA.
Every year, more than 58 million passengers pass through SFO airport, and the number is growing, especially on the USA to India routes. That’s why understanding the SFO terminal layout before you fly can save you from a lot of stress. So whether you’re switching flights, changing terminals, or just getting through security and baggage claim, this guide will make it easier to get around SFO.
A Quick Overview of San Francisco International Airport
Below, we have listed a few facts to help you understand the layout and features of SFO at a glance. Have a look:
| Category | Details |
|---|---|
| Airport Code | SFO |
| Year of Establishment | 1927 |
| Area Covered | 5,207 acres |
| Distance from Downtown San Francisco | 13 miles (21 km) |
| Number of Terminals | 4 (T1, T2, T3 & International Terminal) |
| Concourses | 7 (A–G) |
| Number of Runways | 4 |
| AirTrain Service | 24/7 free automated terminal transit |
| Main Airlines | United Airlines (hub), Delta, American, Air India, Emirates |
| Facilities | Lounges, meals, shopping, yoga rooms, spas, showers & childcare facilities |
San Francisco Airport (SFO) Terminal Guide
SFO is structured in a way that keeps domestic and international operations clearly separated. Below is a terminal-wise breakdown for travelers:
| Terminal | Type of Flights | Major Airlines |
|---|---|---|
| Terminal 1 (Harvey Milk) | Domestic | American Airlines, JetBlue, Southwest |
| Terminal 2 | Domestic + limited international codeshares | Alaska Airlines, Air Canada, Delta |
| Terminal 3 | Domestic | United Airlines (primary hub) |
| International Terminal – Concourses A & G | Long haul / International | Air India, Emirates, Japan Airlines, Lufthansa, and others |
Tip: Terminal assignments can change, so always reconfirm your terminal and gate via your airline’s app or boarding pass before heading to the airport.
SFO Terminal 1 – Harvey Milk Terminal
Terminal 1 (Harvey Milk Terminal) at SFO is the newest and most modern terminal. It primarily serves Southwest Airlines, JetBlue, and a few other domestic carriers. The terminal features updated gates, enhanced security screening, and a spacious, light-filled layout designed for faster passenger flow.
Terminal 1 at SFO is also famous for its sustainability and traveler-first design. Some of the best amenities include:
- Wide, lounge-style seating with charging ports
- Updated security checkpoints
- Kids play areas
- Local Bay Area dining options
- Modern restrooms and water refill stations
Lounges at SFO Terminal 1
The lounges in Terminal 1 include The Club SFO, Alaska Lounge, American Airlines Admirals Club, and the USO Lounge.
SFO Terminal 2 – Calm and Convenient
Terminal 2 at SFO serves as the main terminal for Alaska Airlines and Delta Air Lines. It’s famous for being one of the first terminals in the U.S. to be LEED Gold-certified, focusing on sustainability, fresh design, and wellness. The main airlines operating at SFO Terminal 2 are:
- Alaska Airlines
- Delta Air Lines
SFO’s Terminal 2 is curated to make travel more relaxing, featuring:
- Bright, airy interiors with natural lighting
- A yoga room
- Comfortable lounge-style seating with power outlets
- High-quality Bay Area dining
- Modern art displays
- Dedicated family-friendly spaces
Lounges at Terminal 2
- Delta Sky Club
- American Express Centurion Lounge
SFO Terminal 3 – The United Airlines Hub
Terminal 3 at SFO airport—previously known as the North Terminal—is the main home of United Airlines for all domestic flights. The terminal is organized into 36 gates across two easy-to-navigate concourses:
- Concourse E: Gates E1–E13
- Concourse F: Gates F1–F22
SFO’s Terminal 3 is the most modern and eco-friendly terminal. It features solar-powered infrastructure, wide walkways, and upgraded traveler amenities designed for convenience and speedy access. You’ll find:
- Relaxed, lounge-style seating
- A dedicated yoga room
- Children’s play areas
- Plenty of power outlets and USB ports
- Clean, renovated restrooms
- Simple connections to other SFO terminals via walkways and AirTrain
Lounges in Terminal 3
If you’re flying United or holding premium status, Terminal 3 offers access to:
- United Club lounges (multiple locations)
- American Express Centurion Lounge
Both lounges include premium dining, business spaces, and fast internet—ideal during long layovers.
SFO International Terminal (Terminal A & Terminal G)
The International Terminal at SFO is divided into two primary boarding zones—Boarding Area A and Boarding Area G—and manages all international departures and arrivals.
- Boarding Area A – Used by many SkyTeam and oneworld partners
- Boarding Area G – Primarily used by United Airlines & Star Alliance carriers
The purpose of this terminal is to facilitate travel throughout the world by facilitating long-distance flights and the transition between different routes. The airlines operating at the International terminal are:
- United Airlines (Boarding Area G)
- Lufthansa, ANA, Air India, Singapore Airlines (Star Alliance)
- Cathay Pacific, Japan Airlines, British Airways (oneworld)
- AeroMexico, Air France, KLM, Korean Air (SkyTeam)
- Many independent international carriers
International Terminal Highlights
- Spacious check-in halls
- Easy connections to Terminals 2 & 3 via AirTrain and walkways
- Global food options
- Duty-free shopping
- Airline lounges in both Boarding Areas A & G
- Automated passport control and Global Entry kiosks
International Lounges at SFO
- United Polaris Lounge
- United Club (International)
- Delta Sky Club (International flights)
- Cathay Pacific Lounge
- British Airways Lounge
- China Airlines Lounge
- Multiple Star Alliance partner lounges
(The exact mix may vary depending on operational changes.)
How to Move Between Terminals at SFO
Use the AirTrain, a free shuttle that runs between all terminals, the BART station, the rental car centre, and the parking garages.
- Red Line connects all terminals and parking
- Blue Line goes to the rental car centre too
Runs every 4–5 minutes, 24/7!
Flying from SFO to India?
Be it a last-minute trip or a planned family visit, you can book cheap flights from SFO to Delhi with Flyopedia. Apart from this, we have other options such as:
- SFO to Mumbai
- SFO to Bangalore
- SFO to Hyderabad
- SFO to Chennai
Call Flyopedia to get the best offline deals from SFO to India flights.
FAQs for SFO Travellers
Q1) Does SFO provide baggage storage or lockers?
A) Yes, luggage storage is available in the International Terminal, Main Hall, near the G gate security checkpoint.
Q2) Where do I clear customs and immigration at SFO?
A) All international arrivals go through customs and immigration at the International Terminal (Arrival Level, Level 2).
Q3) How can I travel from SFO to downtown San Francisco?
A) You can use BART (rapid transit), taxis, ride-shares (Uber/Lyft), airport shuttles, or rental cars. BART is the fastest and budget-friendly option.
Q4) Is there a hotel inside SFO airport?
A) Yes, the Grand Hyatt at SFO is directly connected to the terminals via AirTrain (Blue Line). Ideal for long layovers or early flights.
Q5) How can I move between SFO terminals?
A) SFO provides 24/7 AirTrain service, connecting Terminals 1, 2, 3, and the International Terminal, along with parking garages, BART station, and the rental car center. The AirTrain is free, wheelchair-accessible, and runs every 4–6 minutes, making inter-terminal travel quick and easy.
Q6) Does SFO offer special assistance for disabled or senior passengers?
A) Absolutely—wheelchair assistance, mobility support, elevators, and accessible restrooms are available. Book assistance with your airline in advance.
Q7) Is there parking available at all SFO terminals?
A) Yes, each terminal has a dedicated parking garage or lot, with options for short-term and long-term parking. Most garages are directly connected or accessible via AirTrain.
