Travelinformation
Flying to COLOGNE (CGN) Airport
 
The most convenient airport to arrive at is the Köln-Bonn Flughafen, known internationally simply as Cologne(CGN).  http://www.airport-cgn.de
 
There are many direct flights from European cities, especially from budget airlines (EasyJet, GermanWings, TUIfly, Air Berlin...) but also from Lufthansa and other national carriers. There is a BUS service (line SB60) to the Bonn Central Railway Station (Bonn "Hauptbahnhof" or "Hbf") leaving from outside the terminal 1 building, stand A / T1, roughly every 30 mins (this varies with time of day and day of the week).
For plan see:  Bus terminal 1 at Cologne-Bonn Airport
 
See timetable:
 #SB60 Cologne-Bonn Airport - Bonn (HBF)
 
The journey time is 34 minutes. A single ticket costs ca. EUR 7.10 + Schnellbuszuschlag (additional fee for express bus) EUR 2.60
The ticket is also valid for the onward journey from Bonn Hbf to the MPIfR (see below).
The cost of a TAXI to Bonn or the MPIfR is about EUR 35-40.
Flying to DUSSELDORF (DUS) and FRANKFURT (FRA) Airports
 
see:  http://www.dus-int.de/dus_en
see:  http://www.airportcity-frankfurt.com
 
Both these airports are within reasonable reach of Bonn Hbf by TRAIN.
For train times consult:  reiseauskunft.bahn
 
There are train services from Düsseldorf Airport to Bonn Hbf; direct connections take just over 1 hour. There are also a few direct train connections from Frankfurt Airport to Bonn Hbf, taking about 1h 50m. There is a more frequent (and faster) ICE train service to Siegburg (38 mins) from which there is a direct connection by TRAM ("S-Bahn") line 66 to Bonn Hbf (25 mins). A single tram ticket costs ca. EUR 4.60 (see below)
 
See tram timetable:
 #66 Siegburg - Bonn (HBF)
Busses:
There is a city-bus connection from the hotels located in the centre of Bonn (Günnewig, Stern etc).
 
Please take the busses:

 #610 / #611 from Hauptbahnhof - Hbf (Central Station) to the
Max-Planck-Institute for Radioastronomy Bus Stop: Immenburg Park ( EUR 2.60 )
 
#610
Platform D2: (direction: Duisdorf Bahnhof) Departure every 20 minutes
 
#611
Platform D2: (direction: Lessenich/Meßdorf Meßdorf Sportplatz) Departure every 20 min
 
 Single tickets for bus and tram journeys within Bonn cost EUR 2.60. They can be purchased from a kiosk near the bus stands, or from a number of machines or in bus. When you start your journey the ticket needs to be stamped in the machine in the bus or tram. (This ticket allows you to transfer from one line to another with no extra charge, providing this is a single journey within Bonn of duration less than 2 hours.)
 
It is also possible to buy a strip of 4 tickets for the reduced charge of EUR 9.40. To use them the individual sections should be stamped by the machine in the bus or tram.