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We present a new global fit of neutrino oscillation parameters within thesimplest three-neutrino picture, including new data which appeared since ourprevious analysis~\cite{Forero:2014bxa}. In this update we include newlong-baseline neutrino data involving the antineutrino channel in T2K, as wellas new data in the neutrino channel, data from NO$\nu$A, as well as new reactordata, such as the Daya Bay 1230 days electron antineutrino disappearancespectrum data and the 1500 live days prompt spectrum from RENO, as well as newDouble Chooz data. We also include atmospheric neutrino data from the IceCubeDeepCore and ANTARES neutrino telescopes and from Super-Kamiokande. Finally, wealso update our solar oscillation analysis by including the 2055-day day/nightspectrum from the fourth phase of the Super-Kamiokande experiment. With the newdata we find a preference for the atmospheric angle in the upper octant forboth neutrino mass orderings, with maximal mixing allowed at $\Delta\chi^2 =1.6 \, (3.2)$ for normal (inverted) ordering. We also obtain a strongpreference for values of the CP phase $\delta$ in the range $[\pi,2\pi]$,excluding values close to $\pi/2$ at more than 4$\sigma$. More remarkably, ourglobal analysis shows for the first time hints in favour of the normal massordering over the inverted one at more than 3$\sigma$. We discuss in detail theorigin of the mass ordering, CP violation and octant sensitivities, analyzingthe interplay among the different neutrino data samples.

Status of neutrino oscillations 2018: first hint for normal mass ordering and improved CP sensitivity