As an ex-aircraft engineer and current airline pilot and I can confidently say that your choice of degree is immaterial if you then plan a career in commercial flying. An airline is only interested in whether you can pass the type-rating and line training in minimum time and represent the airline in a professional manner. A degree in aeronautical engineering will be quite hard in itself and, unless your heart is in it, soul destroying. Choose a degree course you are interested in and can stick with for 3 or 4 years. One thing won't impress an airline is a tendency to give up when the going gets tough.