Arrival by Plane:
The easiest way to reach Göttingen is to fly to a nearby airport and take a train or a bus. The closest cities (i.e., between 1 and 2h by train from Göttingen) with airports are: Frankfurt, Hamburg, Bremen, Berlin, Hannover. All of these airports are reachable with low-cost airlines such as Ryanair and Easyjet. You can purchase a train ticket at bahn.de (discounted tickets are available until 1–2 weeks before the date). You can reach Göttingen by bus via flixbus.com.
Arrival by Train:
Göttingen is fairly well connected to various rail networks. For routes and pricing, please consult bahn.de.