Some might find this link interesting, some not..............
If I owned an airline, I would want to put bums on seats as early as possible and therefore, offer the cheapest seats to those that come first. If my seats sell fast and I have a full aircraft 2 weeks before the departure date, I'd be happy. Therefore, if I only sold half of my seats, I'd punish the later buyers by putting my prices UP. Now, if I still have a few seats left or even half an aircraft empty, I would still only offer 2-3 seats at last minute discount prices as a gesture of goodwill so as not to encourage future passengers to wait until the last minute hoping to get an ultra cheap flight.
During a recession though, I might be offering very good early bird discounts to get as many confirmed bums on seats as early as possible. I probably only need half an aircraft full of passengers to make a profit or break even so why should I upset the early bookers by offering too many last minute discounted tickets or any that are ultra cheap. My ultra cheap last minute tickets are for those that travel light, those backpacker types that wait around airports simply wanting to fly somewhere cheap and not to any particular destination. Of course, as the article linked above says, there are peak and off peak times, get on my early morning or late at night flight and it'll most probably be cheaper than the midday flight. If my airline needs to stop off somewhere causing you a 6 hour flight because you have to wait a couple of hours for the connecting flight to your final destination then, I'll offer that cheaper as well so that folk don't opt for the direct and more expensive flight.
For those that are planning to fly to Bulgaria this spring/summer, shouldn't you be checking on-line now for the cheapest flights as I don't see my airline putting the prices down, only UP the closer it gets to the departure date albeit, none of us knows what is going to happen if the economy gets worse and why, I would want as many confirmed bums on seats as early as possible.