Four years after competing in her first Olympics, Koschischek qualified for her second Austrian team, as a 25-year-old, at the 2012 Summer Olympics in London, by attaining a B-standard entry time of 58.80 seconds in the women's 100 m butterfly. She challenged seven other swimmers on the third heat again, including former Olympic champion Otylia Jędrzejczak of Poland. She came only in last place by one tenth of a second (0.10) behind Portugal's Sara Oliveira, outside her national record time of 1:00.54. Koschischek, however, failed to advance into the semifinals, as she placed thirty-seventh out of 42 swimmers in the preliminary heats.