[2] From Gortin in County Tyrone, Flanagan attended Sacred Heart College, Omagh before she and her twin sister, Roisin Flanagan, also a distance runner, earned scholarships at Adams State University in Colorado.

[5] In May 2021, Flanagan beat her personal best by 12 seconds to set a new Northern Ireland 3000 metres steeplechase record of 9 mins 40.68 secs at a meeting in Eugene, Oregon.

[6] In July 2021, she was confirmed as selected on the Ireland team for the delayed 2020 Summer Games in Tokyo to compete in the 3000 metres steeplechase.

[8] Later that month Flanagan competed in the 3000 metres steeplechase at the European Athletics Championships in Munich.

[9] In December 2022 Flanagan and her sister participated in the European Cross County Championships in Turin, where they helped secure a bronze team medal for Ireland.