The main bus station is right next to the central train station.
There is a direct buslink to Bremen (€19, one-way) and Oldenburg.
You can get a ticket directly from and to Bremen Airport at the VVV office in Groningen. A single is €20 and a retour ticket (valid over at least a week) is €30.
Also the direct bus to Lelystad, via Heerenveen, Lemmer and Emmeloord leaves there.
The Most Frequently Asked Travel Questions about Groningen
Where To Stay & Best Hotels in Groningen - updated May 2024
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Groningen Travel Guide from Wikitravel. Many thanks to all Wikitravel contributors. Text is available under Creative Commons Attribution-ShareAlike 3.0, images are available under various licenses, see each image for details.