I have been using FareCompare.com lately and found it a great tool. One thing I have noticed though is that in many cases, when a great fare is located using their tool, it's almost impossible to actually book at that rate.

Their site theoretically shows you the dates that the fare is available for, but when I actually try to go and search for that fare, a much higher fare comes up either using their booking engine (Kayak?) or going to the airline site directly. (Note that I'm talking here about fares that are more than 4 hours old, so they should be in the online booking systems).

My question is, on the date selection page, they show you a box with the Fare Rules for the selected city pair (example below)...

---------------------------------
Fare Rules

$557 (w/taxes $596) roundtrip
Created Feb 09 2007
Fare Class TE73D6NX
Min Stay 3 days
Max Stay 60 days
Flt Restr No Restriction
---------------------------------

...is there any way to search by the Fare Class to find dates that this fare is actually valid? This would help me tremendously.

Thanks,

Jonathan