I found a good deal through American Airlines for getting to the world congress. After hours of online searching I found flying to Zurich, Switzerland and taking a train from there was the best option for us. The flight has a stop in Dallas or New York then on to Heathrow airport in London and then a short flight to Zurich all for $638.00 round trip! The train station is at the airport and takes less than three hours to get to Freiberg at around $60.00 dollars. There seemed to be good connections with not very long wait times. The return flight was even better with only one stop in the U.S. before returning to Seattle. Most other flights to Frankfurt or Basil were a couple hundred dollars more but still envolved taking a bus or train to Freiburg. If you have not made reservations yet this seems like a very good rate.