Hello Mike!

You should proceed as Donna has suggested. The train fare from Erfurt to Frankfurt is about €38.00 and the ride takes 2 hrs 10 mins to 2 hrs 20 mins. Check the timetable of trains operated by German Rail on their website which is also available in English:

http://www.bahn.de/pv/uebersicht/die...l_guests.shtml

We'll catch an Adria Airlines flight from Frankfurt to Vienna that we booked with Opodo at a rate of €109.00 (incl. taxes and fees). You may wanna check out Opodo's UK site at http://www.opodo.co.uk

Mike, are you going to Gelsenkirchen as well? If so, I suggest to book a flight from Vienna to Düsseldorf, which is just around the corner from Gelsenkirchen. We booked an Austrian Airlines flight from Vienna to Düsseldorf at a rate of €80.00 (incl. taxes and fees). We're leaving Vienna on May 30 at 07:15 am, so we'll make it to Gelsenkirchen in time.

I hope this helps. If I can be of any further assistance, please get in touch.

See ya out on the road!