Quickest 4h 29min
There are 4 buses1 flight from Dortmund to Groningen.
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There are 2 ways to travel from Dortmund to Groningen. 4 buses and 1 flight are possible between the two areas. The bus from Recklinghausen to Groningen is the cheapest and fastest.
It's important to check each mode when booking your ticket so that you can find the best method for you. The cost of each type varies differently, so be sure to use Faretrotter to keep an eye out!