Maths is always good, and Physics is a bonus.
That said, I failed maths in my Irish Leaving Cert and dropped out of physics in my last year. I went on to study Aeronautical Engineering at degree level and achieve a 2nd class honours (if i wasnt such a slacker i could have managed a 1st).
Airlines tend to appreciate mental ability over what you sweat at school, and will tend to look at things like: did you apply yourself to your chosen subjects? If you did then you have shown that you have an ability to learn.
Even with my grades I have managed to get into final rounds of sponsorship applications, and passed all flying school aptitude tests I have sat so far. I am still holding out that my time will come. Good luck