Benson began the 2015 season with a 10k on the road at Vancouver Sun Run where she ran 35:49. In April 2015, she had a personal best of 2:07. Benson started a string of personal best on May 30, 2015 at the 2015 Christie-Phoenix Insurance Victoria Run Series where she won in 2:01.58. She then won the 2015 Victoria International Track Classic in a then personal best time of 2:01.02. She ran the team standard to represent Canada at the 2015 World Championships in Athletics, where she again ran a personal best time of 1:59.59 in the semi-finals of the 800 metres, placing 17th overall.