Capot's comment on fuel is probably one of the most important in this thread. Not the price of fuel now, but the forward price at which the companies buy it is critical to their financial health.
As for the suggestion that things may get worse towards the winter - I think quite the opposite is the case.
Confidence is gradually returning to the markets plus anyone wanting a bargain will be buying their winter tickets now while the price is lower. Money paid in advance is money in the airlines' bank accounts early which adds a significant advantage to their balance sheets.