From Frankfurt: Take the A3 towards Cologne for about 150 km until the Bonn/Siegburg interchange. Change to the A560 towards Bonn. At the St. Augustin-West interchange, take the A59 until the Bonn‑Beuel interchange. Continue on the A565 towards Altenahr/Koblenz and take the Bonn‑Endenich exit. Keep right at the exit, turn towards Duisdorf, then turn right again before the next traffic light into “Auf dem Hügel.” House number 71 is on the left. If you miss the Endenich exit, continue to the Lengsdorf exit, turn right towards Endenich, and after about 2.5 km, turn left into “Auf dem Hügel.”

From Düsseldorf: Take the A44 towards Ratingen until the Ratingen interchange, then continue on the A3 towards Cologne/Frankfurt until the Heumar interchange.
Option A: Take the A59 via the Gremberg interchange to the A565 towards Altenahr/Koblenz (Bonn‑Beuel interchange).
Option B: Take the A4 towards Aachen until the Cologne‑South interchange, continue on the A555 to the Bonn‑North interchange, then take the A565 towards Altenahr/Koblenz. In both cases, take the Bonn‑Endenich exit.

From Cologne/Bonn Airport: Take the express bus SB60 to Bonn Central Station (approx. 30 minutes). The bus stop is located directly opposite the main airport building. Continue with bus line 610 (towards Duisdorf) or 611 (towards Lessenich) to the “Immenburgpark” stop, which is directly opposite the institute building.
If you prefer to take a taxi from Cologne/Bonn Airport (25 km from Bonn city center), contact a Bonn-based taxi company. This is usually much cheaper than taking a taxi directly from the airport.

From Düsseldorf Airport: There is a direct train connection to Bonn.

From Frankfurt/Main Airport: There is a direct train connection to Bonn.

Please note that only IC/EC trains go directly to Bonn Central Station. ICE trains on the new high-speed line do not stop in Bonn. In that case, get off at Siegburg/Bonn and continue with the S-Bahn line 66, or get off at Cologne Central Station and continue to Bonn from there.