Frankfurt Airport has two railway stations
The long-distance railway station is at the AIRail Terminal, right next to Terminal 1. Trains arrive at and depart from platforms 4 to 7. Upon arrival at long-distance train station, passengers can drop off their flight baggage immediately at the “Baggage check-in at the AIRail Terminal”. Please inform yourself in advance whether your airline is offering Check-In-Service at AIRail Terminal.
In addition, there is a local railway station for S-Bahn, regional and local trains at Terminal 1, Level 1. Trains arrive at and depart from platforms 1 to 3.
Both railway stations are linked to Terminal 2 via buses and the Sky Line.
This is how you get there:
From the platform (Level 0, Area B) go one floor higher up, following signs to Terminal 2. When in Area B or C, get on a free Shuttle Bus to Terminal 2. The service runs between 05:00 and 00:30 hrs (5am to 12:30am). Alternatively, follow signs to the Sky Line in Hall B. This service to Terminal 2 runs at 2-minute intervals.
Important: You are not permitted to take trolleys onto a Sky Line train.