Originally Posted by
javabytes
It's a combination of two things.
Availability *usually* shrinks as you get closer to departure. This is what prompts DL to state "only XX seats left at this price". But most people have no idea what the fare rules are. You could look today and see fares with no such warning and tomorrow they could be double the price because you no longer meet the advance purchase rule that.
Thanks for the explanation and yes, I guess that is exactly it -- not knowing what the fare rules are.
I'm sort of confused on whether you are looking to save money or looking to buy a higher fare class to improve your upgrade chances.
Normally the former, but in this case the latter -- It's just that yesterday the fare class for the 4/25 flight was "Q" and I feel like I should have bought it. Today, it is down to a "U" and not much cheaper. Oh well, hindsight, 20/20, etc.