The name of degree you ultimately gain is probably not significant to an airline. A degree in modern history requires just as sufficiently high level of academic ability as aeronautics. Similarly, you can be interested in English literature whilst dream of a career as a pilot.
People from all sorts of backgrounds are now flying airliners - doctors, teachers, chemists, manual workers, stockbrokers, geoligists, the list is endless.
The important thing is to reach as high an educational standard as you can - without delaying your career too much! This is important for a number of reasons: to avoid being overshadowed by the hundreds of other graduates that may apply for the same opportunities; to show a training organisation (such as CTC) that you have the brains and academic determination to get through the course; and perhaps most importantly, you have something to fall back on if you plans don't work out.
All the very best.
Captain Bloggs