I have a son in year 11 who wants to fly for the airlines. My strong recommendation to him is Swinburne or RMIT.
For years I used to hire Decathlons from GFS and over that time saw many Swinburne graduates going into the airlines.
If he wants to change careers in 20 years time, his bachelors degree in aviation would still be a good basis for post-graduate study in another area.
Even without the career benefits of a degree, I'd still recommend going to uni. Education for the sake of education has a lot of virtue.