If he went to school in the UK, then they spend 3 years in university, but it's equivalent to the US "4 year degree".

Yes the BBA degree is from an UK university.

@Sniper

BBA - Bachelor of Business Administration
B.Com - Bachelor of Commerce

While enrolled in college, I got my BS in math and computer science. I also enrolled at the school's aviation school. I graduated with my CFI/CFII/MEI and about 500 hours without any BS/certificate of completion in the college of aviation. I didn't take any of the psychology classes/non-flying classes that are required for such a degree. The only real downside was that when it came to registering for a flight slot, I was always the last one to get to choose because those actually pursuing an aviation degree always got first pick. I almost always got a Tues-Thurs-Sat 8a slot, but I didn't really mind. I just couldn't party on Fridays ;) I recommend going the route I did. Most colleges will let you take some aviation courses without actually getting a degree. It might help if you, as I did, transfer into those courses with at least a PPL (I had my PPL and IRA).

If it comes down to a choice between an aviation degree and a non-aviation degree, I would personally go with the non-aviation degree. It’s better to have a backup in case your flying career goes down the dumps.
In the case of getting an interview/job, all the airlines look for is that you have a degree, period. Flight time and experience is the biggest criteria that they are looking at, not if you have a degree in aviation management or biology.
That being said, if you are planning on making a career out of the aviation industry having a degree in something aviation related may help you with getting a job.