Kammala wannan jumla: A ranar 14 ga Janairu, 2012, Flanagan ya lashe gasar Olympics na Marathon na Amurka a Houston, ya kafa rikodin a cikin 2: 25:38. Ta ci gaba da wakiltar Team USA a gasar Olympics ta mata a London, inda ta gama ta 10 tare da lokacin 2: 25:51. Ta ci nasara a fagen tsere a Lisbon Half Marathon a watan Maris, inda ta yi rikodin lokaci na 1:08:52. Ta zo a 25th a cikin
2012 Gasar Rabin Marathon ta Duniya ta IAAF.