There are frequent taxi or van transfers from the airport at reasonable rates.
Proof of citizenship is necessary to cross the border into Mexico.
Upon arrival, visitors are given a Tourist Card which must be turned in upon departure at the airport. At that time, a departure tax is charged and payable in U.S. dollars or Mexican pesos. It's very easy to get to Puerto Vallarta, in high season there are more than 450 flights arriving weekly. Aeromexico flies from Los Angeles. Delta Airlines flies non-stop from Los Angeles.