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We propose a model based on the gauge group $SU(3)_{C}\otimesSU(3)_{L}\otimes U(1)_{X}$ with an extra $S_{3}$ flavor symmetry, whichaccounts for the lepton masses and mixing. The small active neutrino masses aregenerated via a double seesaw mechanism. In this scenario, the spectrum ofneutrinos presents very light, light and very heavy masses. The model predictsa quasidegenerate normal hierarchy active neutrino mass spectrum and therelation $\Delta m_{21}^{2}\ll \Delta m_{31}^{2}$ arises from effectivesix-dimensional operators. The obtained neutrino mixing parameters are inagreement with the neutrino oscillation experimental data. We find CP violationin neutrino oscillations with a Jarlskog invariant of about $10^{-2}$.

Lepton masses and mixing in $SU(3)_{C}\otimes SU(3)_{L}\otimes U(1)_{X}$ models with a $S_3$ flavor symmetry