You might want to buy a Sunday copy of the Los Angeles Times. There's always all kinds of ads in the Travel Section for places all over the world, including Mexico.

Also, you may want to go to the various airlines or travel search engines to find the cost of a flight from Vancouver, San Francisco and Los Angeles.

I know now a flight can be booked from Los Angeles for anywhere between $250 to $300 from LAX to Guadlajara, which I believe is level with PV but further East.

Good luck, Rose - Los Angeles