[maddalab]

ITA Software, acquired by Google in the last year, has always had this functionality available at [1]. In fact it is more full featured with ability to search international flight and a number of other options. There are even apps for iphone and android. This functionality pales in comparison to what is available there. I do not see the point of building this rather than have people use what is better and currently available.

[1] http://matrix.itasoftware.com/

[tonfa]

How fast is Matrix? How does it scale?