Frontier Airlines, the Fastest Growing U.S. Carrier to Mexico, Expands Service with New Flights to Puerto Vallarta from San Jose and Sacramento Frontier Airlines today announced it will add new flights to Puerto Vallarta, Mexico with non- stop service from both Sacramento (SMF) and San Jose (SJC), Calif. Tickets for the new routes are on sale now at FrontierAirlines.com. The new Sacramento route, which will operate four days per week starting Dec. 15, 2007, will offer the comfort of the a...