Train Info
The S8 train from the Frankfurt Airport to Mainz will not be running.
They are running a bus “S8X”. This leaves from the airport and goes directly to Mainz HBf.
For those of you who are familiar with the Starbucks at the ‘long distance train station’, go there and go out the doors. That is where the S8E bus can be boarded.

The other option is to take the S-bahn to the Frankfurt HBf and catch a regional train from there RE3, RE14, RE2 (depending on the time).
Close