San Francisco International Airport (SFO) is among the busiest of the United States and is mainly used by Alaska and United. The airport SFO is the starting point for more than 40 airlines to the most important domestic and international destinations. It allows the journey of travellers from one side of the continent to the other, from North America to Europe to Asia to Latin America to the Middle East and even to Oceania.
The article gives you a complete guide to the SFO airlines that are working at every terminal, along with the airline’s contact details.
List of Airlines Operating at San Francisco Airport by Terminal
The airport SFO is the main hub of United Airlines and thus offers most of its flights to the San Francisco Airport. Another major airline serving SFO is Delta Air Lines. So do low-cost carriers like JetBlue and Frontier, the airport is still serving at their ends with international flights.
Among SFO international flights, there are airlines such as Emirates, Lufthansa, and Singapore Airlines, which will fly you to 50 of the world’s most famous destinations.
The SFO Airport terminals are split into 4 terminals – Terminal 1, Terminal 2, Terminal 3, and the International Terminal. The International terminal is then split into boarding areas A and G, which by far manage most of the international airlines at SFO.
Here is a comprehensive overview of the airlines at SFO, structured by terminal, and further below
Terminal 1 (Harvey Milk Terminal)
The Harvey Milk Terminal, an alternative name for Terminal 1, is the main hub for SFO domestic airlines such as Southwest and JetBlue. It is also the hub for some international flights, such as WestJet, which connects travelers to important destinations in Canada and Mexico.
Hereunder is the enumeration of the SFO airlines at Terminal 1:
| Airline Name | Code | Phone |
| JetBlue Airways | B6 | 1-800-538-2583 |
| Southwest Airlines | WN | 1-800-435-9792 |
| WestJet | WS | 1-888-937-8538 |
Terminal 2
Terminal 2 is the main base for the two airlines, Alaska Airlines and Delta Air Lines. It is primarily a terminal for international and domestic flights. The terminal serves the most important cities, including Seattle (SEA), Atlanta (ATL), Chicago, and New York. The following is a list of SFO airlines located at Terminal 2:
| Airline Name | Code | Phone |
| Alaska Airlines | AS | 1-800-426-0333 |
| Delta Air Lines | DL | 1-800-221-1212 |
Terminal 3
Terminal 3 at SFO Airport is mainly dedicated to United Airlines’ domestic flights. It has a well-planned flight schedule that serves other major cities, including Chicago, Denver, Houston, and Washington, D.C. As well, it will be the gateway for United Express, which connects the larger airports with the smaller ones, such as Boise, Eugene, and Reno:
| Airline Name | Code | Phone |
| United Airlines | UA | 1-800-864-8331 |
| United Express | UA | 1-800-864-8331 |
International Terminal (Boarding Areas A and G)
The International Terminal serves SFO international flights, which are assigned to two Boarding areas: A and G.
Boarding Area A is the operational center for Emirates, Lufthansa, and Singapore Airlines. On the other hand, Boarding area G serves United Airlines’ long-haul flights and international partners like Air New Zealand. Airports also serve domestic flights from San Francisco, operated by United and Alaska Airlines.
Here is the list of SFO airlines International Terminal (Boarding Area A):
| Airline Name | Code | Phone |
| Aer Lingus | EI | 1-800-474-7424 |
| Air Canada | AC | 1-888-247-2262 |
| Air France | AF | 1-800-237-2747 |
| All Nippon Airways (ANA) | NH | 1-800-235-9262 |
| British Airways | BA | 1-800-247-9297 |
| Cathay Pacific | CX | 1-800-233-2742 |
| Emirates | EK | 1-800-777-3999 |
| EVA Air | BR | 1-800-695-1188 |
| Japan Airlines | JL | 1-800-525-3663 |
| KLM | KL | 1-866-434-0320 |
| Lufthansa | LH | 1-800-645-3880 |
| Philippine Airlines | PR | 1-800-435-9725 |
| Qantas | QF | 1-800-227-4500 |
| Qatar Airways | QR | 1-877-777-2827 |
| Singapore Airlines | SQ | 1-833-727-0118 |
Here is the list of SFO airlines International Terminal (Boarding Area G):
| Airline Name | Code | Phone |
| United Airlines | UA | 1-800-864-8331 |
| Air New Zealand | NZ | 1-800-262-1234 |
| Asiana Airlines | OZ | 1-800-227-4262 |
| Korean Air | KE | 1-800-438-5000 |
SFO is a central hub with a wide variety of flights, tailored to each passenger’s preferences. United and Alaska Airlines are the two leading airlines at SFO, given that they carry the most passengers. The airport also serves Delta and Southwest, as well as global airlines such as Emirates and Lufthansa.
Whether you’re going to take a domestic flight to Los Angeles Airport or an international flight to Tokyo, SFO can still provide you with more than 200 destinations worldwide, all having well-planned flight schedules.
Frequently Asked Questions
Indeed, SFO is home to low-cost airlines including Alaska Airlines, JetBlue, Southwest Airlines, and Frontier Airlines.
For domestic flights, United Airlines operates from Terminal 3; for international flights, it operates from Boarding Area G.
Terminal 1 at SFO is where JetBlue operates.
Direct flights from SFO are offered by airlines such as Lufthansa, British Airways, United Airlines, Air France, and KLM. Cities like London, Frankfurt, Paris, Amsterdam, and Zurich are served by these airlines.
Air France, Emirates, Lufthansa, Singapore Airlines, ANA, British Airways, Cathay Pacific, and Japan Airlines are among the international airlines operating out of SFO.
JetBlue, Southwest, and United Airlines are based out of SFO Terminal 1.
United Airlines, Delta Air Lines, British Airways, Lufthansa, Emirates, and Singapore Airlines are among the full-service airlines that operate out of SFO.
San Francisco International Airport (SFO) is served by several major domestic and international airlines. Some of them are United Airlines, Delta, Alaska Airlines, JetBlue, Lufthansa, and Emirates, to name a few.
