Frustrating: FlyingBlue Award Calendar Eliminates Flexible Date Search

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I love a loyalty program that makes it easy to search and book award flights online. What are the characteristics of a perfect award search tool?

— The ability to search award availability for weeks at a time with the click of a button
— The ability to specify that you just want nonstop flights, or want to fly a particular airline
— Actually showing award availability for all partner airlines online, rather than just a subset of them
— Having accurate information displayed (which is one of the biggest challenges websites seem to have)

For example, I think American’s website is great for the airlines they show availability on. The interface is easy, you can search availability for a month at a time, and you can specify that you just want to fly American (which is useful on transatlantic flights, where you want to avoid British Airways due to the fuel surcharges).