Originally Posted by
be_rettSEA
Typically crediting to AS Wallet is instantaneous. Most cases I've seen it take close to 7 days are when you're within 24 hr of purchase and still eligible for full refund, but I think it's taken a day once or twice when beyond that before, too.
Given it's a pretty significant amount of fare difference, I'd probably take the risk on cancelling hoping it shows up immediately.
If you have a multi-leg itinerary and one of the legs goes down in price, is there any way to change just that one leg (to the same flight) and get the credit for the price difference?