WestJet was to be the Boeing launch customer for the winglets on the 737-600, but announced in their second-quarter 2006 results that they were not going to move ahead with those plans.
WestJet ía ser o cliente de lanzamento do 737-600 con winglets, pero debido aos resultados no segundo trimestre de 2006 anunciou que non seguiría adiante con ese plan.