As the whole learning ecosystem is changing because of COVID-19 pandemic outbreak, education institutions and teachers are demanded to cope with technology for online learning and give the best learning experience to their students. The aim of this research is to identify synchronous and asynchronous online learning in English language classrooms in Indonesian schools and universities during COVID-19 pandemic, focusing on technological applications used and challenges faced by both teachers and students. By implementing Systematic Literature Review (SLR) approach from Indonesian Science and Technology Index known as SINTA and SCOPUS database, 31 research papers published between 2020-2022 in the Indonesian context are selected. This research creates a table of synchronous and asynchronous online learning applications used in English language classrooms as well as activities done and challenges faced by both teachers and students during COVID-19 pandemic in the Indonesian context. The results of this research can be used by relevant stakeholders to help incorporate a balanced synchronous and asynchronous online learning in their English language classrooms as well as anticipate and prepare for future learning in their respective schools and universities, especially after COVID-19 pandemic.