PurposeThe purpose of this study is to examine the effect of supply chain integration (SCI) in terms of supplier, customer and internal integration on supply chain performance (SCP) and export performance (EXP). The effect of SCP on EXP is also explored. This study further seeks to examine the mediating effect of SCP on the relationship between the types of SCI and EXP.Design/methodology/approachThe population of this study consists of manufacturing companies in different industries in Jordan. Data were gathered using self-administered questionnaires; managers from 271 companies responded to the survey. The study constructs were assessed for validity and reliability, and it was ensured that acceptable levels of these tests were obtained. Structural equation modeling (SEM) was used to test the study hypotheses.FindingsThe findings showed that supplier and customer integration were not drivers of EXP, but internal integration positively impacted EXP. In addition, internal and customer integration positively affected SCP, while supplier integration did not. Also, SCP positively impacted EXP. Furthermore, customer integration and internal integration indirectly impacted EXP through SCP.Practical implicationsManufacturers should establish both intra- and inter-organizational collaborations to improve their performance. Specifically, managers in developing countries need to pay substantial attention to internal integration, as it is the key antecedent of both SCP and EXP. Furthermore, managers must be aware of the essential role of customer integration in improving SCP and subsequently EXP. Therefore, they should make long-term plans to integrate and incorporate key customers. In addition, managers are advised to reconsider their current relationships with suppliers. By failing to take advantage of the valuable expected contribution of supplier integration, manufacturers may lose export opportunities to international competitors.Originality/valueThe present study addresses an evident gap in the available literature regarding the effect of SCI on EXP. It tests a comprehensive model underlining the role of SCP on the relationship between SCI types and EXP. This study is also valuable because it was conducted in a developing country. Generally, manufacturing companies in developing countries face more SC-related difficulties than those in developed countries; these challenges can limit the export abilities of manufacturers in developing countries. The study offers important implications for the managers of manufacturing companies to improve their SCP and, subsequently enhance their EXP.