Fandango MSN TicketsFandango today announced a partnership with MSN to become the web portal’s official online and mobile movie ticketer, adding to deals the site already has in place with Yahoo and AOL’s Moviefone. MSN’s sites reach more than 100 million U.S. users per month, according to comScore. Comcast-owned Fandango had its best ever May results in traffic and ticket sales last month, when sales increase 47% year-over-year — it’s biggest monthly haul ever thanks to box office ruler The Avengers — and monthly visitors were up 29% to 34 million. The totals were helped by recent deals with AMC Theatres, Regency Theatres and other exhibition chains.