Originally Posted by
oceanscape
Is it best to just ask at the check-in desk on the day?
That's what I used to do - I'd say something about paying for an upgrade to make it clear that I wasn't just chancing my arm. I think my hit rate was nigh on 100% across various long haul routes in terms of them offering me a price to move to WTP, but the price wasn't always one I was willing to pay. The price to move to J was usually 3-4x that of to WTP which I almost never considered good value.