Purpose: This mixed-methods study proposed a digital-storytelling-based (DST-based) online flipped learning approach during the pandemic, and investigated its impact on EFL learners' willingness to communicate (WTC) and their perceptions of the approach. Design/methodology/approach: A 16-week quasi-experiment was carried out in a college English course at a comprehensive university in Chinese mainland. A total of 69 EFL learners were recruited from two intact classes and assigned to either an experimental (the DST-based online flipped learning approach) or comparison (the online flipped learning approach) group, in order to explore the effects of the DST-based online flipped learning approach on learners' WTC. The quantitative data were obtained from the learners' WTC questionnaire. Then, semi-structured interviews were conducted in order to gauge the students' perceptions of the different learning approaches. Findings: The quantitative results demonstrated that the experimental group outperformed the comparison group in terms of WTC at the end of the experiment. Thematic analysis of the qualitative data also lent support to the contribution of this DST-based online flipped learning approach in terms of boosting their English speaking confidence and encouraging more meaningful interaction and collaboration with others. Originality/value: Findings from this study offer insights into integrating the DST-based online flipped learning approach as an instructional implementation of technology-enhanced task-based language learning (TETBLT) in COVID/post-COVID times. Pedagogical suggestions for EFL instructors and researchers are also provided, which would be significant for improving EFL learners' communication skills and would enable them to become more capable and globalized citizens in the twenty-first century.