www.CostaRicaTicas.com

Here's a Website giving all manner of info about airlines (route maps, adds/cancel of routes, Websites though not as click-thrus) with extensive maps of routes including nearby airports that particular airline doesn't fly to (General Aviation aiports and the smaller regionals). Quite a handy site--updated frequently.
They also have a "Swine Flu dashboard" with reporting on latest outbreaks etc. etc. This may become more important to us when H1N1 season really hits.
www.TheairDB.com

SHOUT-OUT: to Brother Mysnoatb for triggering my interest--he'd mentioned a train station that had an airport Code and I wondered why...

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"A man accustomed to hear only the echo of his own sentiments, soon bars all the common avenues of delight, and has no part in the general gratification of mankind"--Dr. Johnson
"Amen, brother"-ED