Bad Ems is located in the beautiful Lahn valley, about 20 minutes from Koblenz where the rivers Rhine and Mosel meet.

By train:

From Frankfurt train direction "Limburg", change in Limburg to train direction "Koblenz". Travel time between 1h22 and 2h11 depending on your connection. It is a very pretty train ride!

By plane: Frankfurt International Airport or Frankfurt Hahn

By car from Frankfurt International Airport:

https://en.mappy.com/#/2/M2/TItinerary/IFRFrankfurt%20Airport%2C%2060549%20Frankfurt%20on%20the%20Main%20(Germany)|TO56130%20Bad%20Ems%20(Germany)|GP1.396|GTpetrol/N0,0,8.72761,50.37634/Z11/

By train from Frankfurt International Airport: take the subway to Frankfurt central station (Hauptbahnhof), from there see above.

By car from Frankfurt-Hahn Airport (inexpensive car hire):

https://en.mappy.com/#/3/M2/TItinerary/IFRFrankfurt-Hahn%20Airport%2C%2055483%20Lautzenhausen%20(Germany)|TO56130%20Bad%20Ems%20(Germany)|GP1.396|GTpetrol/N0,0,8.13501,50.24113/Z9/

There are also regular buses from Frankfurt-Hahn to Koblenz: http://ma.rmv-bus.de/Hahn/busfahrplan.htm

Bad Ems is a 15 minute pretty train journey from Koblenz.