Repetitive exposure, memory, and attention influence time judgments. Empirical research suggests that musical repetition affects the subjective estimation of duration, and that melodic repetition (repetition of melodies) interacts with memory and attention. Nevertheless, the effects of melodic repetition on the subjective estimation of duration remain largely unexplored. We investigate how exact (literal) melodic repetition affects listeners’ feelings of the temporal flow of 12-tone compositions. Musicians heard 16 original monodic keyboard pieces that either contained or avoided repetition, subsequently providing prospective estimates of felt duration and average phrase length (in seconds) for each piece. Compositions were structured in either 4- or 16-s phrases. Repetition occurred without lag (immediate) or after a contrasting melody (intercepted). The findings suggest that repetition contracts listeners’ feelings of the temporal span of entire pieces and their internal melodies, particularly when the latter are short. Brief melodies repeating without lag felt shorter than those intercepted with contrasting material. We consider previous theories of musical repetition (Huron's habituation-fluency, 2013; Margulis’ attention-shift, 2012) to interpret the results.