The link I posted suggests possible treatments.
It's basically all about debunging yer tubes 
So, steam, menthol crystals, short-term decongestant sprays or tablets, longer-term nasal steroid sprays (as an anti-inflammatory), antihistamines all have a role to play.
Blowing up balloons can be good too as it gently pushes pressure up the ET while you 'push' air into the expanding balloon.
Glue ear in adults, while possible, is not that common because adults are bigger than children - it's purely a size problem. Bigger head, bigger tubes, better drainage. Of course just as the shape of everybody's nose is different, everybody will have a subtly different size/shape of ET, so some people are much more prone to these problems than others.
I know I am deaf for about 3 days after flying. It wears off or 'pops' if I yawn in just the right way 
What treatment have you had so far? Have you spoken to your GP about it?