How to get there
by Air
Local Airports Erfurt-Weimar and Leipzig Halle are low traffic. Frankfurt/Main is the major Airport hub and in equal distance to Weimar then Berlin. Cochstedt is a Budget-Airline airport. If you are planning to take the train from the Airport you should inquire with your travel agent or airline if they offer a Rail to Fly ticket which costs only 25,-€ from any airport to any destination in Germany.
Train
Trains are the standard way to travel in Germany, but it may be expensive if you book last minute. Booking well in advance will save you up to 75% but is bound to one specific train and not transferable. Deutsche Bahn even offers special deals from other European countries from 39,- but the availability is limited. There used to be a non-stop IC connection to Berlin every two hours, but for some reason it doesn't exist any more. Many ICE stops in Weimar were cut as well. Sign a partition here.
<display_points service="openlayers" layers="osm-oepnv,osm-mapnik,osmarender" zoom="7"> 50.975714,11.330031|Weimar, Germany </display_points>
Bicycle
There is a good network of bicycle routes but it takes some planning. <display_points service="openlayers" layers="osm-cyclemap,osm-mapnik,osmarender" zoom="9"> 50.975714,11.330031|Weimar, Germany </display_points>
Bus/Coach
There is a coach service to Berlin, Frankfurt and other cities operated by BerlinLinienBus.
Car
Obviously you may also travel by car. <display_points service="openlayers" layers="osm-mapnik,osmarender,bing" zoom="7"> 50.975714,11.330031|Weimar, Germany </display_points>