QUICK ANSWER
AirTrain is the airport people mover connecting terminal areas and major landside facilities.
01
Secure-side routes
Some adjacent gate areas have post-security connections, but your exact route depends on gates and current configuration.
02
International connections
Immigration/baggage processing can force landside movement and security again.
03
Use current map
SFO’s map is the authoritative orientation tool for terminals and AirTrain stops.
Frequently asked questions
Does AirTrain connect SFO terminals?
Yes, AirTrain serves terminal areas and other airport facilities.
Do I always need security again?
No, but it depends on your arrival/departure gates and whether you remain in a connected secure zone.
✓
Sources and verification
Time-sensitive airport, airline, visa, security and transport details should always be confirmed with the relevant official source before travel.