Not only Microsoft's, but, of all the logos on

http://www.fairsearch.org/about-fairsearch/

at least 3 of the logos have direct ties to them: Tripadvisor is part of Expedia, which was part of Microsoft before being sold (I don't how how much of it) to Ticketmaster. Kayak is a major partner of Microsoft on Bing (after accusations of Microsoft copying their design) and, obviously, Microsoft itself. Travelocity is also a Windows Azure partner (they are one of the companies Microsoft mentions when they push Azure).

So, no. It's not "Microsoft's" site. But we can sense a connection to it, despite the fact the domain is registered to an undisclosed entity through a company in Portugal. It also runs under Apache/PHP on CentOS.

http://www.fairsearch.org/about-fairsearch/ Microsoft seems to be one of many. Looks like it's mostly Microsoft and plane seat booking sites.