There are regular connections from international airport Frankfurt/Main as well as Frankfurt Hahn Airport to the city of Frankfurt.
Travelling to the fair from Frankfurt Airport (FRA) or Frankfurt Hahn (HHN)
S-Bahn (fast train) services S8 and S9 (direction Hanau/Offenbach; Ost/Frankfurt Hbf) run at frequent intervals, taking you from the airport to Frankfurt's main train station (Hbf) in about 10 minutes. From there, you can use public transportation to get to the fair. Get more information here.
Alternatively, you can take the "Airport Express" from Terminal 1 via Terminal 2 to the exhibition site.
Public transformation services RMV