Coping flexibility is a promising approach to understanding risk and resilience, but it has been conceptualized in various ways. The aim of this study was to test convergence of coping-related flexibility measures with other coping-related competencies (coping self-efficacy, emotion regulation, decentering) and ways of coping. Participants were 885 students (Mage = 21.5 years) who completed measures of flexibility (seven subscales), coping self-efficacy, emotion dysregulation, decentering, and ways of coping with recent interpersonal stressors. Breadth of coping was also examined, given its past use as a measure of flexibility. The seven flexibility subscales converged with each other as expected, and all were associated with greater coping-related competence, with moderate or large positive associations between the four measures of coping flexibility ability and other measures of coping-related competence. Regarding associations with ways of coping, multivariate models showed that perceived ability in coping flexibility had positive associations with engagement and negative associations with disengagement coping, but multiple situational/adaptive coping flexibility subscales were associated positively with both engagement and disengagement ways of coping. Additionally, some findings were weak or counterintuitive, especially when ways of coping and breadth were considered, suggesting a need for more attention to precisely conceptualizing and appropriately measuring coping flexibility.