Freiburg is located in the southwest corner of Germany near France and Switzerland, and is near three major airports.
Participants can reach Freiburg easily from Frankfurt Airport (FRA) or from Zürich Airport (ZRH) by train (~2–2½ hours). Train tickets can be booked in advance from bahn.de or at the train stations.
Lufthansa sometimes offers Rail and Fly tickets that include a train ticket with the flight. There are also cheaper long-distance coach connections to Freiburg from Frankfurt Airport Terminal 2 (~4 hours) or from Zürich Central Station (~2¼ hours; Note: does not depart from the airport) that can be booked in advance at meinfernbus.de.
From Freiburg Central Train/Bus Station most of the hotels listed above are easily reached on foot. Taxis can also be found at the central station.
Rental cars are certainly an option for getting to and around Freiburg, and all three airports have stations of the major rental chains. Note that parking spaces are limited in the city center and at the conference venue, and most parking spaces near the conference venue are also metered.