Lowest prices are usually with 60 30, 21, 14 or 7 day advance purchase.

I'm not trying to scare anybody, but just fyi, this was in the news today:

NEW YORK (Dow Jones)--US Airways Group Inc. (UAIR) brought up the possibility of another bankruptcy filing Friday, as the airline tries to cut labor costs and negotiate with debt holders.

In a filing Friday, the airlines said it is considering all available options, including that of another "judicial restructuring."

In the filing with the Securities and Exchange Commission that included first-quarter financial data, US Airways said it has remained in the red ever since emerging from bankruptcy protection in March, due to the competitive fare environment.

US Airways said in the filing it has a transformation plan to cut costs to a level in-line with low-cost airlines JetBlue Airways Corp. (JBLU) and America West Holdings Corp. (AWA) by changing employee salaries and work rules, marketing and distribution techniques, and airline scheduling and operations.

US Airways wants to implement such changes by mid-year, but that will require changes in the airline's contracts with unions.