There's also a really good viewing area from the departure lounge overlooking the apron. You can't get photo's of aircraft at the gates, but when they push back or taxi in, you get good views and the the windows don't have much of a tint.
I had a look around the airport and there aren't many accessible areas to photograph from, apart from the beach. The sun is on the right side there as well. You might be able to find a spot from the golf course adjacent to the airport, but you'll need a long lens. Puerto Vallarta itself is a great place. And you never know what might float past you!
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Photo © Darren Wilson
Equipment: 2x Canon EOS 50D; Sigma 10-20 EX DC HSM, 50-500 EX APO DG, Canon 24-105 f/4 L, Speedlite 430EX