Beginning the season again with a win at the U.S. Classic, Hubbell and Donohue were assigned to consecutive Grand Prix events, the 2018 Skate America and 2018 Skate Canada International. They won gold at both events, becoming the first team to qualify for the Grand Prix Final. After victory at Skate Canada International, Hubbell observed "we wanted to challenge ourselves to become champions in difficult situations and we knew that it was going to be really challenging to do two grand prixs back to back at the beginning of the season." At the Grand Prix Final, they placed first in both programs and won the title.