Baden Airpark, or as it’s officially known, Flughafen Karlsruhe/Baden-Baden, is situated roughly half way between Karlsruhe and Strasbourg. It ranks 18th on the list of German airports and handles at least 1.2 million people per year. The airport was built in early 1952 as a military base for the Royal Canadian Air Force. It remained a military airport until 1997 when the first commercial flights started, and today it manages flights mainly to Spain and Turkey. Hurry and book your Karlsruhe Airport hotel with HRS before they are all sold out.
There is an interesting and unique museum in Karlsruhe called ZKM. It is dedicated exclusively to interactive art, and should be on your must see list. The city zoo is quite nice and accessible from your Karlsruhe Airport hotel. If medieval villages are interesting to you, then wander over to Durlach. Cycling in the city is excellent and there are many places you can go.
Frankfurt International Airport is only one hour away if you need an international connection. There are regular bus services that run the airport and Baden-Baden. From there you can take a train to your Karlsruhe Airport hotel. The city is very well linked to the ICE high speed rail network. If you are coming to town by car, take the A5 out of Frankfurt or the A8 from Stuttgart. Getting around the city is easiest on foot. It is a compact city and the main sights are all along the Kaiserstrasse.