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¶ Meeting Venue 
Hilton San Francisco Union Square
333 O'Farrell St,
San Francisco CA 94102
¶ Map 
The following link is a map of restaurants, attractions, hotels, etc. in the area surrounding the IETF venue.
IETF 127 Map of San Francisco
¶ Side Meetings
More information about side meeting signups will be available closer to the meeting date.
¶ Transportation
Traveling to the San Francisco Bay Area can be exciting, but navigating a new city may feel a bit overwhelming, especially if it’s your first time. In San Francisco, most airports, train stations, and major transit stops provide clear English signs, which will guide you to taxi stands, rideshare pickup areas, BART stations, shuttle bus stops, and other key locations.
If you find that signs are unclear or need extra help, don’t hesitate to approach a nearby information desk or airport staff — they are generally friendly and accustomed to assisting travelers from around the world.
Tip: Having your hotel address saved on your phone or written down can make taking taxis or rideshares much easier.
¶ Airport Transportation 
There are three major airports near the San Francisco Bay Area:
¶ San Francisco International Airport (SFO) – Main International Airport
Most international flights arrive at and depart from SFO. It offers convenient transportation options including Uber/Lyft, taxis, airport shuttles, rental cars, and BART (Bay Area Rapid Transit) directly to downtown San Francisco.
¶ Oakland International Airport (OAK)
A popular alternative to SFO, often used by domestic and low-cost airlines. From Oakland International Airport (OAK), travelers can reach downtown San Francisco in approximately 30–45 minutes by Uber, Lyft, or taxi, depending on traffic. The airport also connects to the Bay Area Rapid Transit (BART) system via the Oakland Airport Connector, providing convenient access to San Francisco and East Bay cities. Rental cars and shared airport shuttles are also available for added flexibility.
¶ San Jose Mineta International Airport (SJC)
SJC is the most convenient airport for Silicon Valley, South Bay, and nearby cities. From San José Mineta International Airport (SJC), travelers can reach San Francisco in approximately 45–70 minutes by Uber, Lyft, or taxi, depending on traffic. A shuttle connection to Caltrain provides direct train service to San Francisco, and rental cars and shared airport shuttles are also available.
¶ Train 
¶ Bay Area Rapid Transit (BART): https://www.bart.gov
BART network provides fast, affordable rail service across the Bay Area, linking airports, downtown areas, and major cities. Tickets can be purchased at station machines using cash or credit, and staff are available onsite for assistance.
San Francisco International Airport (SFO) has a BART station inside the International Terminal with direct service to downtown San Francisco (about 30 minutes), the Mission District, Oakland and other East Bay cities, plus many hotels near Market Street and Union Square.
From Oakland International Airport (OAK), take the Oakland Airport Connector to Coliseum Station and transfer to BART trains toward San Francisco.
Trains typically run every 15–20 minutes.BART is often faster than driving during rush hour. It is the recommended option for airport transfers if you are staying near downtown San Francisco.
From San José Mineta International Airport(SJC), travelers can take the airport shuttle to Milpitas BART Station or Berryessa/North San José Station and connect to BART for service to downtown stations such as Powell Street, Montgomery Street, or Embarcadero. Uber, Lyft, taxis, rental cars, and shared airport shuttles are also available for direct door-to-door travel, typically taking 45–70 minutes depending on traffic.
¶ Caltrain: https://www.caltrain.com
Caltrain network provides fast, affordable rail service connecting San José, the Peninsula, and downtown San Francisco. Trains run frequently, and tickets can be purchased at station ticket machines, through the Caltrain mobile app, or using a Clipper Card. Station staff are available to assist if needed.
From San José Mineta International Airport (SJC), take the airport shuttle (Route 60) to Santa Clara Transit Center or San Jose Diridon Station, where you can board Caltrain to San Francisco’s 4th & King Station. From there, local Muni buses, Metro, or a short rideshare can take you to Union Square or nearby hotels.
¶ Bus 
Several public bus systems serve San Francisco and the greater Bay Area, providing convenient connections within cities and between neighboring communities.
San Francisco buses
San Francisco Municipal Transportation Agency (Muni) operates an extensive network of buses and light rail throughout San Francisco. Muni buses are a convenient way to reach neighborhoods not directly served by BART or trains. Fares can be paid using the Clipper Card, the MuniMobile app, or ticket machines at select stops. Muni website: https://www.sfmta.com
East Bay buses
AC Transit provides bus service throughout the East Bay, including Oakland, Berkeley, and surrounding cities. Many routes connect with BART stations, making transfers easy. AC Transit website: https://www.actransit.org
Peninsula & Airport buses
SamTrans serves the Peninsula, including routes to and from San Francisco International Airport (SFO). SamTrans buses connect with both BART and Caltrain stations. SamTrans website: https://www.samtrans.com
¶ Taxi and Rideshare 
Taxis and rideshare services are widely available throughout the Bay Area and are a convenient option for door-to-door travel, especially late at night or when public transit is limited.
Rideshare apps
Uber and Lyft operate across the Bay Area and serve all major airports and cities. You can request rides directly through their mobile apps, choose different vehicle types, and pay digitally.
Pickup areas are clearly marked at major airports, including San Francisco International Airport (SFO) and Oakland International Airport (OAK).
Taxi services
Traditional taxis are also available at hotels, airports, and designated taxi stands in San Francisco and surrounding cities. You can typically pay by credit card, cash, or mobile wallet.
¶ Arrival Coordination 
¶ Departure Coordination 
¶ Language 
USA Official Language is English
¶ Money Conversion 
The official (cash) Currency of USA is the United States Dollar (international abbreviation USD).
XE Currency Conversion Website
¶ Electrical Plug / Outlet 
Electrical Plug and Voltage Information for San Francisco: (https://www.power-plugs-sockets.com/us/united-states-of-america-usa/)
In the United States, power plugs and sockets (outlets) of type A and type B are used. The standard voltage is 120 V at a frequency of 60 Hz.
¶ Telephone/SIM Card 
¶ Emergency Assistance 
In case of an emergency situation, the emergency number in San Francisco (USA) is 911.
A selection of Hospitals are pinned in the above map.
¶ Weather 
Current weather conditions in San Francisco, USA
