Opacity calculation for aluminum, iron, and gold plasmas using FLYCHK code

•FLYCHK calculation on Planck and Rosseland mean opacities of Al, Cu, and Au in wide temperature & density ranges is reported.•Comparisons with opacities from PROPACEOS and ATOMIC code provides the validity range of FLYCHK opacity, as well as its limitation.•Correlation of the plasma coupling parameter with opacity, and the sensitivity of LTE and NLTE conditions are reported.•This investigation provide a deeper insight on the opacity related to plasma parameters, and validity of FLYCHK opacity.