I dont know much about how airlines would view specific degrees (if they would view different ones diferently at all) - I am very much a fresh-out-of-the-box newbie, but...
If you are wanting to do a serious degree (ie, non micky mouse) how about something like Aeronautical Engineering? It will include lots of aviation stuff to keep you interested, is an engineering based degree (obviously a wide genre and a very respectable degree) and it will make the most of your maths and physics studies. I have seen in some prospectusus/prospectus'/ prospectii (???) one of their projects was to design a plane! cool!
I wouldnt worry about your studies all being maths based! - its quite an important subject - all your displaying (assuming good grades
) is that you have mastered it!
Good luck with whatever you do anyway!