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The symmetrical A/B/A structure of multilayer blown films was fabricated in this study. The immiscible low-density polyethylene/polylactic acid (LDPE/PLA) blend was set as a core (B) layer and LDPE was used as skin (A) layers. The compositions of PLA in the core layer were varied from 20 to 50 wt%. The thickness of each layer was 10 μm (total film thickness of~30 μm). In a blown film co-extrusion process, the morphology of the fiber/ribbon-like structures of LDPE/PLA blend was developed.Such structures had interesting effects on gas permeability and aroma barrier properties of the films. For instance, multilayer LDPE films containing 40 and 50 wt% PLA (P40 and P50) showed the reduction of oxygen permeability (PO 2 ) approximately 20% and 43%, respectively, compared with the neat LDPE film. A long tortuous path for gas and aroma transportation through film thickness was created from the developed ribbon-like structures of the PLA minor phase. For durian packaging application, fresh-cut durian of 300 g was packed in the developed multilayer films, LDPE, and HDPE (Control), stored at 4°C for 7 days. Results demonstrated that the steadystate condition of 10% to 13% O 2 and 8% to 10% CO 2 was achieved in all packages except in the HDPE. Moreover, the P40 and P50 films exhibited an outstanding aroma barrier property for three major durian volatiles: diethyl sulfide, ethyl propanoate, and 2-ethyl-1-hexanol. Overall results clearly indicated that the multilayer LDPE films containing PLA exhibited a significantly improved aroma barrier performance with optimum gas permeability desirable for modified atmosphere packaging to retain quality of fresh-cut durian throughout the storage period. KEYWORDS aroma barrier packaging, low-density polyethylene, modified atmosphere packaging, multilayer film, polylactic acid