One can find a car hire in Frankfurt in the Frankfurt Airport. Also one can rent a car online on such websites like Kayak, Sixt, Europcar, Bedget or Expedia.
By train or by car
The driving distance from Frankfurt, Germany to Liège, Belgium is 192.84mi / 310.34km
Car or train would be the best.
330 miles or about 528km
244.1mi / 392.84km
10 hours
3 hours by car.
One may rent of a car in Frankfurt at many of the worlds top rental companies. As an example, some of these include Expedia, EuropCar, and Auto Europe.
869 miles
about 1,5 hours by car
there are 60 km between giessen and Frankfurt am main. if you go by car you need a half hour.