I have flown on AA many times and they are fine. I assume you are flying into San Jose. I think you are cutting it WAY to close. Assuming you arrive on time, you will have to clear customs and immig. Plus, San Jose is in the middle of the country. You will have a haul to get to the coast. (Which ever side you are leaving from. I stayed in Puntarainis (sp?) on the Pacific side, and it took us a couple hrs to get there. (Winding skinny road with lots of traffic). I think your best bet would be to arrive a day early and spend the night in San Jose.