There are a whole bunch of these CES-only special flights to/from LAS being added in 2018, including LAS-SMF and LAS-CMH. Internationally, they will have LAS-AMS, LAS-CDG, LAS-NRT and LAS-ICN. Previously they only had LAS-NRT but added LAS-CDG last year; for 2018, LAS-AMS and LAS-ICN are also being added.