No cathay is not part star alliance its member of One World Alliance
KLM is neither a Star Alliance member or partner. It is however a member of the SkyTeam airline alliance.
No, Air France is a member of the SkyTeam alliance.
Mexicana stopped operating in August 2010. Previously, it was a member of Star Alliance from 2000 to 2004. It was also briefly a member of Oneworld Alliance before going out of business.
No it is a founding member of the oneworld alliance!
No it is not. Very shortly it will be part of the OneWorld alliance.
No, Delta was a founding member of SkyTeam.
No Delta is not part of the Star Alliance and never has been. Delta was a founding member of SkyTeam.
No, Lufthansa's American partner is JetBlue Airlines