Chesir continued to improve with a time of 68:36 minutes for third at the Delhi Half Marathon, then 66:57 minutes for fifth at the RAK Half Marathon. This led to her selection for the 2016 IAAF World Half Marathon Championships, where she was sixth in a time of 68:46, but outside of the team rankings behind compatriots Peres Jechirchir, Cynthia Jerotich, and Mary Wacera Ngugi, who swept the top three positions. She placed third in the 10,000 m at the 2016 Athletics Kenya Olympic Trials, but did not get added to the Kenyan team as she had not achieved the required qualification time. She continued on the roads, with top five finishes in Delhi, Copenhagen, and Prague before winning the Lille Half Marathon with her second fastest ever time at that point with 67:49 minutes.