The low-fare Frontier Airlines will begin flying to Los Cabos from McCarran International Airport (LAS) twice weekly, starting on Friday, March 26. Flights to Puerto Vallarta will begin on Thursday, March 25. “Frontier has quickly become a preferred airline in Las Vegas with an established crew base, robust flight schedule and ultra-competitive fares and we look forward to welcoming Nevadans on our two new international routes later this month to the sunny beaches of Los Cabos and Puerto Vallarta,” said Daniel Shurz, senior vice president of commercial, Frontier Airlines.