www.CostaRicaTicas.com

Just checking flights for the next few months A few sites I have visited Yahoo travel you can also join My Yahoo and set a price and they will e-mail you if a airline meets the price. Once I find the airline I go directly to that airline to save a few more dollars.
be careful of depearture and arivial times some cheap flights require a overnight stay. Right now I can get a flight from Pittsburgh to SJO for 277 plus tax and stuff total would probably be around 350.00 that good till middle of November. Other sites to try is Priceline. Orbitz, and the airline also check sites at different times of the day late at night or early in the morning seems to yield better rates on flights.